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RM
RM
667052
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
40185
B. E. Nelson
1997
6
16
167
U.S.A.
Wyoming
Carbon
[location and coordinates withheld]
2097
2128
Ridge with bands of sandstone, soil, and siltstone. Phenology: flowering & fruiting.
RM
RM
679868
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
38231
B. E. Nelson
1996
6
13
165
U.S.A.
Wyoming
Park
[location and coordinates withheld]
1646
1737
Slopes back of gypsum rim. Phenology: flowering.
RM
RM
667051
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
40221
B. E. Nelson
1997
6
16
167
U.S.A.
Wyoming
Carbon
Upper North Platte and Laramie River Drainages: ca 3 air mi WSW of Halfway Hill between First and Second Sand creeks, ca 8.8 air mi SW of Medicine Bow; ca 9.5 air mi NE of Elk Mountain (town).
-106.3139
41.8057
2149
2210
Breaks and sandstone slopes below rim of ridge. Phenology: flowering & fruiting.
RM
RM
679869
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
54426
Ronald L. Hartman
1996
6
9
161
U.S.A.
Wyoming
Park
Northern Absaroka Area: Sheep Mountain 13-14 air mi SW of Cody (center).
-109.2648
44.479
1707
2073
Lower flanks to cut in limestone and plains on northwest corner of mountain. Phenology: flowering.
RM
RM
679870
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
54621
Ronald L. Hartman B. E. Nelson
1996
6
12
164
U.S.A.
Wyoming
Park
Northern Absaroka Area: rugged canyons and ridges near Bennett Creek, 5.5-6 air mi NW of Clark.
-109.229
44.9514
1432
1707
Rocky-sandy drainage, slopes, and ridges. Phenology: flowering.
RM
RM
679871
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
54886
Ronald L. Hartman
1996
6
16
168
U.S.A.
Wyoming
Park
Northern Absaroka Area: southeast end of Rattlesnake Mountain.
-109.1639
44.5079
2073
2317
Limestone outcrops and rocky slopes. Phenology: flowering.
RM
RM
679872
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
55003
Ronald L. Hartman David Rosenthal
1996
7
10
192
U.S.A.
Wyoming
Park
Northern Absaroka Area: Sheep Mountain, north-central access from 1.2-1.4 air mi S of County Road 6FU on west branch of central drainage.
-109.3253
44.4501
2042
2195
Open areas and rocky slopes, calcareous. Phenology: flowering & fruiting.
RM
RM
680961
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
16626
B. E. Nelson
1989
6
19
170
U.S.A.
Wyoming
Park
Northern Absarokas: Bald Ridge above Clarks Fork Yellowstone River, ca 23 air mi NW of Cody.
-109.33056
44.78889
2195
Moist swale. Phenology: flowering.
RM
RM
680960
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
16714
B. E. Nelson
1989
6
21
172
U.S.A.
Wyoming
Park
Northern Absarokas: slope above Reef Creek, ca 1.5 mi E of Cathedral Cliffs, ca 32 air mi NW of Cody.
-109.55222
44.83333
2347
Open slope with scattered limber pine and Douglas fir. Phenology: flowering.
RM
USFS
905368
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
16759
B. E. Nelson
1989
6
21
172
U.S.A.
Wyoming
Park
Beartooth Mountains: just S of Lily Lake, ca 44 air mi NW of Cody.
-109.71833
44.93583
2378
Sagebrush grassland. Phenology: flowering.
RM
RM
680959
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
16933
B. E. Nelson
1989
6
26
177
U.S.A.
Wyoming
Park
Northern Absarokas: at the Reef just W of Lodgepole Creek, ca 1.8 air mi SW of Crandall Ranger Station, ca 36 air mi NW of Cody.
-109.67472
44.81889
2195
2225
Open grassy area. Phenology: flowering.
RM
RM
680966
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
1101
David Rosenthal
1997
6
20
171
U.S.A.
Wyoming
Park
Northern Absaroka Area: Shoshone National Forest: from Four Bear Trailhead to peak 8245T (Jim Mountain Quad), E of Jim Mountain and NW of Four Bear, ca 2.5 mi E of town of Wapiti on U.S. Hwy 14, 16, and 20.
-109.406
44.5079
2134
2286
Sagebrush slopes leading to meadows on north facing slopes. Phenology: flowering.
RM
RM
680965
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
1211
David Rosenthal
1997
6
22
173
U.S.A.
Wyoming
Park
Northern Absaroka Area: Shoshone National Forest: unnamed meadow, slopes, and plateau, S of Chief Joseph Hwy ca 1 mi SE of Dead Indian Pass; Forest Road leading to Dry Creek Road.
-109.3947
44.7178
2545
2708
Spruce/fir forest to ridge with limestone outcrops. Phenology: flowering.
RM
RM
680964
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
1294
David Rosenthal
1997
6
24
175
U.S.A.
Wyoming
Fremont
Wind River Range: Dubois Recreation Area Overlook, ca 1/4 mi NE of Windriver Road on U.S. Hwy 26.
-109.6395
43.5474
2263
2294
Sparsely vegetated, sandy soil with sagebrush on slopes. Phenology: flowering & fruiting.
RM
RM
680963
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
1388
David Rosenthal
1997
6
25
176
U.S.A.
Wyoming
Fremont
Wind River Range: East Fork Big Game Winter Range, ca 3.5 air mi NNE of Dubois.
-109.5798
43.5906
2286
2317
Heavily grazed grassland with Artemisia in draws; some redbeds. Phenology: flowering & fruiting.
RM
RM
680962
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
2924
David Rosenthal
1997
7
22
203
U.S.A.
Wyoming
Park
Northern Absaroka Area: Shoshone National Forest: Northern Absaroka Wilderness: up Crandall Trail, ca 36 air mi WNW of Cody.
-109.739
44.8191
2225
2378
Spruce/fir forest with steep, open slopes and ridges. Phenology: fruiting.
RM
RM
667050
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
41082
B. E. Nelson
1997
6
26
177
U.S.A.
Wyoming
Carbon
Upper North Platte and Laramie River Drainages: Seminoe Mountains: along Hanna-Leo or County Road 291, ca 20.5 air mi NNW of Hanna; ca 35 air mi NE of Rawlins.
-106.7344
42.1374
2280
2359
Moist draw and swale with limber pine. Phenology: fruiting.
RM
RM
680915
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
729
David Rosenthal Cathy Binger
1997
6
14
165
U.S.A.
Wyoming
Park
Northern Absaroka Area: Shoshone National Forest: pack trail up main drainage W of Signal Peak (across river from Laughing Pig Rock), ca 5 air mi E of town of Wapiti on U.S. Hwy 14, 16, and 20.
-109.5435
44.4763
2073
2195
Forested slopes of pine and spruce, open ridges, and volcanics. Phenology: flowering.
RM
RM
680914
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
947
David Rosenthal Cathy Binger
1997
6
18
169
U.S.A.
Wyoming
Park
Northern Absaroka Area: Shoshone National Forest: footslope of unnamed peaks on north side of entrance to Sunlight Basin, ca 24 air mi NE of Cody.
-109.4757
44.7757
2073
2560
Forested slopes with mostly Douglas fir and some pine and spruce; some meadows and rocky outcrops. Phenology: flowering.
RM
RM
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
56444
B. E. Nelson Peter Ebertowski
2002
6
9
160
U.S.A.
Wyoming
Weston
Thunder Basin National Grassland and Vicinity: on the divide between Cottonwood and Horse creeks along Cheyenne River Road and S, ca 39.5 air mi SW of Newcastle.
-104.8904
43.5726
1329
1384
Mosaic of sagebrush-sedge-grassland. Phenology: flowering.
RM
RM
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
56508
B. E. Nelson Peter Ebertowski
2002
6
9
160
U.S.A.
Wyoming
Weston
Thunder Basin National Grassland and Vicinity: N of Keyton Creek off Keyton Creek or Forest Road 937, ca 47 air mi WSW of Newcastle; ca 23 air mi NNE of Bill.
-105.03
43.516
1341
1365
Sagebrush-grassland. Phenology: flowering.
RM
RM
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
56688
B. E. Nelson Peter Ebertowski
2002
6
11
162
U.S.A.
Wyoming
Converse
Thunder Basin National Grassland and Vicinity: along Lake Creek and area to the E, ca 14 air mi NE of Bill; ca 46 air mi NNE of Douglas.
-105.0906
43.3844
1353
1381
Greasewood flats above the creek. Phenology: flowering & fruiting.
RM
RM
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
56708
B. E. Nelson Peter Ebertowski
2002
6
11
162
U.S.A.
Wyoming
Converse
Thunder Basin National Grassland and Vicinity: west side of Cow Creek Buttes on an east branch of Coal Draw, ca 14 air mi E of Bill; ca 41 air mi NNE of Douglas.
-104.9708
43.2695
1426
1463
Sandstone along draw with scattered ponderosa pine and grassy areas. Phenology: flowering & fruiting.
RM
RM
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
56776
B. E. Nelson Peter Ebertowski
2002
6
11
162
U.S.A.
Wyoming
Converse
Thunder Basin National Grassland and Vicinity: on the divide between Cow Creek and head of Deer Creek W of Cow Creek Buttes, ca 12 air mi ENE of Bill; ca 40 air mi NNE of Douglas.
-105.0307
43.2839
1463
1481
Clay slopes with scattered sagebrush. Phenology: flowering.
RM
RM
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
56833
B. E. Nelson Peter Ebertowski
2002
6
13
164
U.S.A.
Wyoming
Weston
Thunder Basin National Grassland and Vicinity: between Buffalo Creek Road and Alkali Draw along a tributary, ca 3 air mi NNW of Goose Butte, ca 8.5 air mi W of Upton.
-104.8118
44.0902
1375
1396
Sagebrush-grassland. Phenology: flowering.
RM
RM
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
56848
B. E. Nelson Peter Ebertowski
2002
6
13
164
U.S.A.
Wyoming
Weston
Thunder Basin National Grassland and Vicinity: Pine Ridge, ca 1 air mi W of Wyo Hwy 116, ca 4.5 air mi N of Upton.
-104.6108
44.1464
1368
1408
Shaly sagebrush flats near bentonite quarries. Phenology: flowering.
RM
RM
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
56988
B. E. Nelson Peter Ebertowski
2002
6
13
164
U.S.A.
Wyoming
Weston
Thunder Basin National Grassland and Vicinity: Sixmile Basin off Forest Road 918, ca 8.5 air mi SSE of Osage; ca 9 air mi W of Newcastle.
-104.3896
43.8657
1219
1250
Sagebrush-grassland slope. Phenology: flowering.
RM
RM
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
57179
B. E. Nelson
2002
6
18
169
U.S.A.
Wyoming
Campbell
Thunder Basin National Grassland and Vicinity: ridge at the heads of Short and Logan creeks, ca 4 air mi W to WSW of Soda Well; ca 24-25 air mi N of Gillette.
-105.3798
44.6292
1310
1378
Idaho fescue meadow, scattered sagebrush, disturbed patches, and edge of ponderosa pine forest on scoria ridge. Phenology: flowering & fruiting.
RM
RM
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
57266
B. E. Nelson
2002
6
18
169
U.S.A.
Wyoming
Campbell
Thunder Basin National Grassland and Vicinity: along West Fork Duck Creek, ca 7.5 air mi NE of Soda Well, ca 28 air mi NE of Gillette.
-105.1975
44.7173
1201
1219
Grassland and sagebrush-grassland. Phenology: flowering & fruiting.
RM
RM
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
1015
Peter J. Ebertowski
2002
7
3
184
U.S.A.
Wyoming
Niobrara
Thunder Basin National Grassland and Vicinity: tributary of Mule Creek, 6.5 mi SE of Mule Creek Junction on U.S. Hwy 18, ca 36 air mi S of Newcastle; ca 42 air mi NNE of Lusk.
-104.1307
43.3193
1219
1250
Gently sloping grassland, soils somewhat clayey. Phenology: fruiting.
RM
RM
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
1195
Peter J. Ebertowski
2002
7
5
186
U.S.A.
Wyoming
Campbell
Thunder Basin National Grassland and Vicinity: tributary S of Keyton Creek on Rochelle Hills or Forest Road 933, ca 26 air mi SE of Wright, ca 23.5 air mi NNE of Bill.
-105.0899
43.5443
1463
1530
Rocky soil in ravine with patches of ponderosa pine. Phenology: fruiting.
RM
RM
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
141
Peter J. Ebertowski
2002
6
18
169
U.S.A.
Wyoming
Campbell
Thunder Basin National Grassland and Vicinity: along ridge running N-S, E and above Short Creek, ca 26 air mi NNE of Gillette; ca 3 air mi W of Weston.
-105.3798
44.6439
1286
1378
Idaho fescue grassland. Phenology: flowering & fruiting.
RM
RM
667049
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
56751
Ronald L. Hartman Amy J. Roderick
1997
5
30
150
U.S.A.
Wyoming
Carbon
Upper North Platte and Laramie River Drainages: Lone Tree Road (BLM 3141) N of Wyo Hwy 487 adjacent to Shirley Ridge, ca 8 air mi NW of Shirley Basin Townsite.
-106.3061
42.3975
2134
2225
Break in Shirley Ridge with limber pine and some Douglas fir below rim, calcareous outcrops, some sandy areas, and a shrub zone below. Phenology: flowering.
RM
RM
667048
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
56782
Ronald L. Hartman Amy J. Roderick
1997
5
30
150
U.S.A.
Wyoming
Carbon
[location and coordinates withheld]
2256
2317
Barren calcareous areas with cushion plants below, robust sagebrush on east slope, and sparse vegetation on west slope. Phenology: flowering.
RM
RM
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
230
Peter J. Ebertowski B. E. Nelson
2002
6
18
169
U.S.A.
Wyoming
Campbell
Thunder Basin National Grassland and Vicinity: ca 1 mi SW of York or Forest Road 900; ca 11 air mi E of Soda Well; ca 28 air mi NE of Gillette.
-105.238
44.6439
1201
1243
Clay and coal breaks with grassy draws. Phenology: flowering.
RM
RM
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
245
Peter J. Ebertowski B. E. Nelson
2002
6
20
171
U.S.A.
Wyoming
Weston
Thunder Basin National Grassland and Vicinity: Cow Camp on Buck Creek, off of Forest Road 926, ca 25 air mi E of Wright; ca 41 air mi WSW of Newcastle.
-105.0101
43.7568
1341
1371
Sagebrush and grassy draw. Phenology: flowering & fruiting.
RM
RM
667047
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
56911
Ronald L. Hartman Amy J. Roderick and B. A. Packer
1997
6
5
156
U.S.A.
Wyoming
Albany
Upper North Platte and Laramie River Drainages: Boot Heel, ca 7 air mi SW of Marshall.
-105.9556
42.2241
2195
2256
Sandstone outcrops and sandy slopes. Phenology: flowering.
RM
RM
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
313
Peter J. Ebertowski
2002
6
20
171
U.S.A.
Wyoming
Weston
Thunder Basin National Grassland and Vicinity: Hay Creek and vicinity on Mush Creek or County Road 58, ca 27 air mi WSW of Newcastle; ca 21 air mi SSW of Upton.
-104.7308
43.7992
1301
1314
Sagebrush/grassland. Phenology: flowering & fruiting.
RM
RM
667046
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
57054
Ronald L. Hartman Amy J. Roderick and B. A. Packer
1997
6
5
156
U.S.A.
Wyoming
Carbon
Upper North Platte and Laramie River Drainages: ca 0.5 air mi N of Chalk Draw near Chalk Hills.
-106.0919
42.3397
2195
Sandstone and calcareous outcrops. Phenology: flowering.
RM
RM
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
381
Peter J. Ebertowski
2002
6
22
173
U.S.A.
Wyoming
Weston
Thunder Basin National Grassland and Vicinity: hill N of Lone Tree Creek on Grieves or County Road 5, ca 19.5 air mi SW of Newcastle; ca 26 air mi SSE of Upton.
-104.5513
43.7284
1274
1310
Rocky slopes and hilltop of broken sandstone. Phenology: fruiting.
RM
RM
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
403
Peter J. Ebertowski
2002
6
22
173
U.S.A.
Wyoming
Weston
Thunder Basin National Grassland and Vicinity: ridge W of Alkali Creek, on Cheyenne River or County Road 54, ca 24 air mi SW of Newcastle; ca 40 air mi SSE of Upton.
-104.4316
43.5443
1219
1262
Sandy hill and ravine. Phenology: fruiting.
RM
RM
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
482
Peter J. Ebertowski
2002
6
24
175
U.S.A.
Wyoming
Converse
Thunder Basin National Grassland and Vicinity: ridge separating Bear Creek and Coal Draw, off Jenney Trail or County Road 34, ca 19.5 air mi WNW of Bill; ca 41 air mi NNW of Douglas.
-105.6288
43.3208
1548
1597
Mosaic of sagebrush and grassland. Phenology: flowering & fruiting.
RM
RM
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
53
Peter J. Ebertowski B. E. Nelson
2002
6
16
167
U.S.A.
Wyoming
Converse
Thunder Basin National Grassland and Vicinity: on a four wheel drive road off Forest Road 944 above and E of Dugout Creek, ca 10 air mi NNW of Bill; ca 43 air mi N of Douglas.
-105.3103
43.37
1439
1451
Sandstone ridge with sandy pockets; scattered sagebrush, rabbitbrush, and skunkbush. Phenology: flowering & fruiting.
RM
RM
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
606
Peter J. Ebertowski
2002
6
24
175
U.S.A.
Wyoming
Converse
Thunder Basin National Grassland and Vicinity: junction of Forest roads 942 and 944, S and above East Logan Draw, ca 26 air mi SSE of Wright; ca 12.5 air mi NNW of Bill.
-105.3103
43.3988
1487
1515
Sagebrush/grassland. Phenology: fruiting.
RM
RM
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
658
Peter J. Ebertowski
2002
6
26
177
U.S.A.
Wyoming
Weston
Thunder Basin National Grassland and Vicinity: above Darlington Draw and S of Tepee Benchmark on Forest Road 923, ca 32 air mi E of Wright; ca 34 air mi WSW of Newcastle.
-104.8505
43.7284
1396
1445
Sagebrush with sandstone outcrops. Phenology: fruiting.
RM
RM
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
909
Peter J. Ebertowski
2002
6
30
181
U.S.A.
Wyoming
Weston
Thunder Basin National Grassland and Vicinity: tributary of Lodgepole Creek off Grieves or County Road 5, ca 23 air mi SW of Newcastle; ca 33 air mi SSE of Upton.
-104.5513
43.6151
1274
1292
Sandy slopes of creek bed. Phenology: fruiting.
RM
RM
667012
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
57137
Ronald L. Hartman Amy J. Roderick
1997
6
9
160
U.S.A.
Wyoming
Carbon
Upper North Platte and Laramie River Drainages: Ferris Mountain Ranch Road, ca 2-2.5 air mi NNE to NE of Lamont.
-107.4353
42.253
2057
2118
Sagebrush flats and rocky ridge. Phenology: flowering & fruiting.
RM
RM
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
3776
Peter J. Ebertowski
2003
5
25
145
U.S.A.
Wyoming
Weston
Thunder Basin National Grassland and Vicinity: ridge between Wildlife Draw and Rock Creek near intersection of Forest roads 923 and 924, ca 30 air mi E of Wright; ca 34 air mi W of Newcastle.
-104.8904
43.7568
1390
1439
Grassland with rocky outcrops and broad ravines. Phenology: flowering.
RM
RM
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
3819
Peter J. Ebertowski
2003
5
25
145
U.S.A.
Wyoming
Weston
Thunder Basin National Grassland and Vicinity: ridge and ravines E of Fields Draw, off dirt road, ca 34 air mi ESE of Wright; ca 32 air mi WSW of Newcastle.
-104.8306
43.6718
1329
1359
Narrow ravine with snowberry, currant and chokecherry. Phenology: flowering.
RM
RM
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
3955
Peter J. Ebertowski
2003
5
28
148
U.S.A.
Wyoming
Campbell
Thunder Basin National Grassland and Vicinity: badlands immediately N of Coal Creek, on Wyo Hwy 59, ca 24 mi ENE of Gillette; ca 31 air mi NW of Moorcroft.
-105.319
44.6145
1152
1164
Sagebrush grassland with rocky outcrops. Phenology: flowering.
RM
RM
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
3997
Peter J. Ebertowski
2003
5
28
148
U.S.A.
Wyoming
Campbell
Thunder Basin National Grassland and Vicinity: western edge of Duck Creek Breaks, immediately E of Duck Creek on two track road, ca 35 air mi NE of Gillette; ca 15 air mi NW of Oshoto.
-105.1772
44.732
1170
1219
Hilly grassland with rocky and clayey bare patches and ravines with ponderosa pine and Rocky Mountain juniper.
RM
RM
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
4106
Peter J. Ebertowski
2003
5
30
150
U.S.A.
Wyoming
Campbell
Thunder Basin National Grassland and Vicinity: badlands SW of Antelope Creek, on two-track road, ca 34 air mi NNE of Gillette; ca 37 air mi NNW of Moorcroft.
-105.2785
44.7467
1176
1213
Mosaic of sagebrush grassland, grassland and clay balds. Phenology: flowering.
RM
RM
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
4140
Peter J. Ebertowski
2003
6
2
153
U.S.A.
Wyoming
Converse
Thunder Basin National Grassland and Vicinity: hills forming southwest portion of Archie Draw on Forest Road 962, ca 13 air mi ENE of Bill; ca 26 air mi NW of Lance Creek.
-105.0107
43.2839
1448
1478
Wyoming big sagebrush grassland intermixed with yucca. Phenology: flowering.
RM
RM
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
4254
Peter J. Ebertowski
2003
6
4
155
U.S.A.
Wyoming
Weston
Thunder Basin National Grassland and Vicinity: ridge S and E of Patrick Creek and Thornton on County Road 32, ca 7 air mi NW of Upton; ca 13 air mi SE of Moorcroft.
-104.7314
44.1464
1323
1371
Sagebrush grassland with rocky clay patches. Phenology: flowering.
RM
RM
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
4321
Peter J. Ebertowski
2003
6
4
155
U.S.A.
Wyoming
Weston
Thunder Basin National Grassland and Vicinity: ridges by radio tower W of West Fork Buffalo Creek on dirt road (continuation of County Road 18), ca 14 air mi SW of Upton; ca 30 air mi WNW of Newcastle.
-104.8319
43.9639
1500
1536
Sagebrush grassland with slopes of little bluestem and rock outcrops. Phenology: flowering.
RM
RM
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
4350
Peter J. Ebertowski
2003
6
6
157
U.S.A.
Wyoming
Weston
Thunder Basin National Grassland and Vicinity: ridge along Lodgepole Creek on Cheyenne River or County Road 54, ca 24 air mi SW of Newcastle; ca 52 air mi ESE of Wright.
-104.5114
43.5726
1256
1286
Depressions of fine sand and sandstone in grassland. Phenology: flowering.
RM
RM
667011
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
57233
Ronald L. Hartman Amy J. Roderick
1997
6
9
160
U.S.A.
Wyoming
Carbon
Upper North Platte and Laramie River Drainages: Whiskey Gap and E up hogback.
-107.4159
42.3252
2134
2317
Sandstone and limestone south exposure and Douglas fir north exposure. Phenology: flowering & fruiting.
RM
RM
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
4935
Peter J. Ebertowski
2003
6
16
167
U.S.A.
Wyoming
Weston
Thunder Basin National Grassland and Vicinity: ridge and ravines SE of and draining to Horse Creek, on two-track off Cheyenne River or County Road 54, ca 33 air mi SE of Wright; ca 37 air mi SW of Newcastle.
-104.8904
43.5726
1353
1378
Grassland, Stipa comata and Carex filifolia abundant. Phenology: flowering & fruiting.
RM
RM
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
5236
Peter J. Ebertowski
2003
6
20
171
U.S.A.
Wyoming
Campbell
Thunder Basin National Grassland and Vicinity: hills W of Little Powder River S of Coal Creek on dirt road off of Wyo Hwy 59, ca 23 air mi NNE of Gillette; ca 31 air mi NW of Moorcroft.
-105.3595
44.5998
1204
1353
Watercourses between clay hills and creek. Phenology: fruiting.
RM
RM
667010
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
57361
Ronald L. Hartman Amy J. Roderick
1997
6
9
160
U.S.A.
Wyoming
Natrona
Upper North Platte and Laramie River Drainages: ca 1 mi E of Beulah Bell Lake.
-107.1209
42.5403
1826
1862
Sagebrush flats and slope. Phenology: fruiting.
RM
RM
667009
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
57427
Ronald L. Hartman Amy J. Roderick and Cherie Winner
1997
6
11
162
U.S.A.
Wyoming
Natrona
[location and coordinates withheld]
1670
1676
Shale hills and sandy areas and badlands. Phenology: fruiting.
RM
RM
667008
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
57496
Ronald L. Hartman Amy J. Roderick
1997
6
11
162
U.S.A.
Wyoming
Natrona
Upper North Platte and Laramie River Drainages: ca 15 air mi SE of junction of Wyo Hwy 487 and Wyo Hwy 220; ca 2 air mi SE of Twin Buttes.
-106.3935
42.5112
2057
2103
Calcareous cap and upper slopes, sandy below. Phenology: flowering & fruiting.
RM
RM
667007
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
58351
Ronald L. Hartman Amy J. Roderick
1997
6
25
176
U.S.A.
Wyoming
Albany
Upper North Platte and Laramie River Drainages: ca 3 air mi NE of north end of Wheatland Reservoir No. 3.
-105.6543
41.9221
2149
Calcareous slope, common. Phenology: fruiting.
RM
RM
725171
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
10258
Erwin F. Evert
1986
6
22
173
U.S.A.
Wyoming
Park
North Fork Shoshone River Drainage: Absaroka Mountains: north-south ridge S of The Wall and W of Big Creek, ca 5-6 mi N of U.S. Hwy 14, 16, and 20.
-109.6175
44.544
2439
2621
Sagebrush-grassland communities.
RM
RM
725082
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
9936
Erwin F. Evert
1986
6
13
164
U.S.A.
Wyoming
Park
North Fork Shoshone River Drainage: Absaroka Mountains: ridge, 0.5 mi NW of Signal Peak, ca 1 mi N of U.S. Hwy 14, 16, and 20.
-109.6643
44.4763
2134
Open, rocky areas with Artemisia, Haplopappus, and Koeleria. Phenology: flowering & fruiting.
RM
RM
731003
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
12044
Erwin F. Evert
1987
6
11
162
U.S.A.
Wyoming
Park
[location and coordinates withheld]
2134
2195
In rocky, open sagebrush-grassland community. Phenology: flowering.
RM
RM
753557
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
14170
Erwin F. Evert
1988
6
5
157
U.S.A.
Wyoming
Park
[location and coordinates withheld]
2195
2347
In meadows dominated by Festuca idahoensis, Leucopoa kingii, Astragalas miser var decumbens and Oxytropis campestris on substrate derived from volcanic rocks. Phenology: flowering & fruiting.
RM
RM
753363
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
14431
Erwin F. Evert
1988
6
14
166
U.S.A.
Wyoming
Park
[location and coordinates withheld]
2195
2317
Summit and north facing slopes below in Douglas fir woodland and rocky openings. Phenology: flowering & fruiting.
RM
RM
753146
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
14692
Erwin F. Evert
1988
6
22
174
U.S.A.
Wyoming
Park
North Fork Shoshone River Drainage: Absaroka Mountains: along Trout Creek trail, ca 1/4 mi N of Gunnysack Creek and ca 4 mi N of U.S. Hwy 14, 16, and 20.
-109.4352
44.5295
2378
Open, rocky, Douglas fir forest with a ground layer of Arnica cordifolia, Festuca idahoensis, and Leucopoa kingii. Phenology: flowering.
RM
RM
751755
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
14968
Erwin F. Evert
1988
6
27
179
U.S.A.
Wyoming
Park
[location and coordinates withheld]
2500
2560
Meadows and rocky ridge-top on limestone substrates, prominent species included: Festuca altaica ssp. hallii, Festuca idahoensis, Avenochloa hookeri, and Oxytropis campestris var. gracilis. Phenology: flowering & fruiting.
RM
RM
752852
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
15061
Erwin F. Evert
1988
6
28
180
U.S.A.
Wyoming
Park
[location and coordinates withheld]
2652
Meadow and forest edge, prominent species included: Festuca altaica ssp. hallii, Festuca idahoensis, Oxytropis campestris var. gracilis, and Trifolium haydenii. Phenology: flowering.
RM
RM
618758
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
18738
Erwin F. Evert
1990
6
10
161
U.S.A.
Wyoming
Park
Bighorn Basin: ca 1/4-1/8 mi S of Sand Coulee Road, ca 4 mi E of Wyo Hwy 120, ca 25 mi N of Cody.
-109.1082
44.7889
1493
Sagebrush-saltbrush-grassland. Phenology: flowering & fruiting.
RM
RM
619286
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
18998
Erwin F. Evert
1990
6
17
168
U.S.A.
Montana
Carbon
Pryor Mountains: Custer National Forest: ca 1/2 mi E of Sage Creek Campground, ca 18 mi ESE of Bridger.
-108.5501
45.2109
1768
Around springs on ridge with Juncus balticus, Iris missouriensis and Crepis runcinata. Phenology: flowering.
RM
RM
619448
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
19222
Erwin F. Evert
1990
6
21
172
U.S.A.
Wyoming
Park
Bighorn Basin: ridge ca 3 mi E of Wyo Hwy 120, ca 9 mi N of Meeteetse.
-108.8637
44.2918
1737
Rocky ridge in sagebrush grassland and limber pine woodland mosaic with Pentstemon laricifolius, Cymopterus hendersonii, Carex filifolia and Stipa comata. Phenology: fruiting.
RM
RM
619698
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
19426
Erwin F. Evert
1990
6
30
181
U.S.A.
Montana
Beaverhead
Henrys Lake Mountains: on Continental Divide, 1/4-1/2 mi N of Red Rocks Pass and Road, ca 25 mi WSW of West Yellowstone. Also Fremont Co, Idaho.
-111.5283
44.6008
2195
2286
Sagebrush-grassland with Artemisia tridentata var. vaseyana, Festuca idahoensis, Arnica fulgens and Potentilla diversifolia. Phenology: fruiting.
RM
RM
738392
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
20440
Erwin F. Evert
1991
6
9
160
U.S.A.
Montana
Madison
Madison Range: ca 2 mi S of McAtee Bridge (over the Madison River): ca 1 mi W of U.S. Highway 287, on both sides of fishing access road.
-111.6691
45.0658
1676
Grassland-forbland dominated by Carex filifolia, Bouteloua gracilis, Phlox longifolia, Astragalus terminalis, and Poa secunda. Phenology: flowering.
RM
RM
738459
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
20599
Erwin F. Evert
1991
6
10
161
U.S.A.
Montana
Madison
[location and coordinates withheld]
1402
1432
Shrubland and narrow riparian area with Toxicodendron rydbergii, Symphoricarpos occidentalis, and Prunus virginiana. Phenology: flowering.
RM
RM
739447
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
21185
Erwin F. Evert
1991
6
27
178
U.S.A.
Montana
Carbon
Beartooth Mountains: Custer National Forest: Sand Dunes Picnic Ground, ca 17 mi NW of Red Lodge.
-109.5965
45.2508
1676
Meadow opening in lodgepole pine forest with Lupinus wyethii, Delphinium bicolor, Arnica sororia, and Koeleria macrantha. Phenology: flowering.
RM
RM
739573
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
21252
Erwin F. Evert
1991
6
28
179
U.S.A.
Montana
Stillwater
[location and coordinates withheld]
1890
Grassland with Festuca idahoensis, Castilleja pallescens, Geum triflorum, and Cerastium arvense. Phenology: flowering.
RM
RM
739278
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
21558
Erwin F. Evert
1991
7
8
189
U.S.A.
Montana
Gallatin
Gallatin Range: Gallatin National Forest: along Trail Creek, ca 1 mi W of Tom Miner Campground.
-111.0773
45.1387
2347
Douglas fir forest-meadow mosaic with Balsamorhiza sagittata, Zigadenus venenosus, Delphinium bicolor, and Lupinus sericeus.
RM
RM
739117
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
21722
Erwin F. Evert
1991
7
11
192
U.S.A.
Montana
Park
Absaroka-Beartooth Mountains: Gallatin National Forest: along incomplete trail to George Lake, above Cascade Creek, ca 14-15 mi S of Livingston.
-110.5395
45.4578
2134
Dry, rocky openings above creek with Hackelia patens, Cymopterus nivalis, and Penstemon deustus. Phenology: flowering.
RM
RM
754694
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
22821
Erwin F. Evert
1992
6
12
164
U.S.A.
Montana
Stillwater
Ca 1/4-1/2 mi S of Cliff Swallow fishing access site, ca 10 mi W of Absarokee.
-109.6345
45.5161
1432
Sagebrush-grassland with Festuca idahoensis, Koeleria macrantha, Zigadenus venenosus, and Artemisia tridentata var. vaseyana. Phenology: flowering & fruiting.
RM
RM
753961
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
22928
Erwin F. Evert
1992
6
12
164
U.S.A.
Montana
Stillwater
[location and coordinates withheld]
1829
Meadow openings in forest with Geum triflorum, Zigadenus elegans, Balsamorhiza sagittata, and Lupinus wyethii. Phenology: flowering & fruiting.
RM
RM
753856
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
23034
Erwin F. Evert
1992
6
21
173
U.S.A.
Montana
Park
[location and coordinates withheld]
1536
Grassland with a few scattered Juniperus scopulorum and with Stipa comatat, Carex filifolia, Bouteloua gracilis, and Zigadenus venenosus. Phenology: fruiting.
RM
RM
753817
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
23099
Erwin F. Evert
1992
6
22
174
U.S.A.
Montana
Park
Gallatin Range: Gallatin National Forest: along north side of Pine Creek and Forest Road 978, ca 20 mi SE of Bozeman.
-110.7657
45.5161
1890
Clearcut in former Engelmann spruce-lodgepole pine forest with Castilleja miniata, Lupinus argenteus, and Carex geyeri. Phenology: flowering.
RM
RM
754955
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
23421
Erwin F. Evert
1992
7
7
189
U.S.A.
Idaho
Teton
Big Hole Mountains: Targhee National Forest: Idaho Ridge, ca 1/4 mi S of Packsaddle Road (Forest Road 235); ca 12 mi WNW of Driggs.
-111.3211
43.7417
2164
2210
Sagebrush-grassland with Purshia tridentata, Festuca idahoensis, and Danthonia californica. Phenology: fruiting.
RM
RM
24630
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
24630
Erwin F. Evert
1993
6
2
153
U.S.A.
Montana
Stillwater
[location and coordinates withheld]
1402
Grassland on south side of creek with Cerastium arvense, Festuca idahoensis, and Castilleja sessiliflora. Accession number duplicated in the database; this specimen not verified. Phenology: flowering.
RM
RM
612491
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
24743
Erwin F. Evert
1993
6
3
154
U.S.A.
Montana
Sweet Grass
[location and coordinates withheld]
1524
1585
Ridge and draw with open ponderosa pine forest and grassland with Pseudotsuga menziesii var. glauca, Leucopoa kingii, Festuca idahoensis, and Arenaria congesta var. lithophila. Accession number is duplicated in the database; this specimen not verified. Phenology: flowering.
RM
RM
612549
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
24806
Erwin F. Evert
1993
6
4
155
U.S.A.
Montana
Sweet Grass
[location and coordinates withheld]
1524
1585
Sagebrush-grassland with scattered Douglas fir and ponderosa pine. Phenology: flowering.
RM
RM
612008
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
24899
Erwin F. Evert
1993
6
4
155
U.S.A.
Montana
Park
[location and coordinates withheld]
1615
Grassland with Zigadenus venenosus, Carex stenophylla, Balsamorhiza incana, and Cerastium arvense. Phenology: flowering.
RM
RM
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
25044
Erwin F. Evert
1993
6
19
170
U.S.A.
Idaho
Fremont
Targhee National Forest: Island Park Plateau: ridge ca 0.5 mi NW of Blue Creek Reservoir, ca 16 mi NNW of Ashton.
-111.6053
44.238
2042
Shrubland with a few scattered juniper and Douglas fir, and with Ceanothus velutinus, Symphoricarpos albus, Purshia tridentata, and Penstemon deustus.
RM
RM
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
25206
Erwin F. Evert
1993
6
20
171
U.S.A.
Idaho
Teton
Targhee National Forest: Big Hole Mountains: along south side of Milk Creek Road, ca 4 mi S of Idaho Hwy 33.
-111.3296
43.8179
2088
Sagebrush-grassland with Viola vallicola, Microseris nutans, Phlox longifolia, and Wyethia amplexicaulis.
RM
RM
611714
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
25418
Erwin F. Evert
1993
6
27
178
U.S.A.
Wyoming
Hot Springs
Southeastern Absarokas: foothills and ridge ca 0.5 mi W of Enos Creek, ca 20 mi SSW of Meeteetse.
-108.8225
43.9246
2012
Sagebrush-grassland with Festuca idahoensis, Leucopoa kingii, Antennaria rosea, Cerastium arvense, and with a few scattered Pinus flexilis and Juniperus scopulorum. Phenology: fruiting.
RM
RM
611775
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
25445
Erwin F. Evert
1993
6
28
179
U.S.A.
Wyoming
Hot Springs
Southeastern Absarokas: south side of Sanford Draw, in foothills ca 0.5 mi N of Grass Creek, ca 28 mi SSW of Meeteetse.
-108.9228
43.8655
2195
Meadow openings and Pinus flexilis woodland with Lupinus polyphyllus var. humicola, Iris missouriensis, Geum triflorum, and Carex vallicola. Phenology: flowering & fruiting.
RM
RM
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
25695
Erwin F. Evert
1993
7
8
189
U.S.A.
Montana
Sweet Grass
Beartooth Mountains: Custer National Forest: along Meyers Creek, in foothills ca 10 mi NW of Nye just W of the county line.
-109.9428
45.4869
1798
Meadow opening in Douglas fir-spruce forest with Festuca idahoensis, Antennaria anaphaloides, Geum triflorum, and Cerastium arvense.
RM
RM
780316
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
26700
Erwin F. Evert
1994
6
5
156
U.S.A.
Montana
Carbon
[location and coordinates withheld]
1237
1304
Sagebrush-grassland with scattered limber pine and juniper; on north/south trending ridge with sandstone outcroppings. Phenology: fruiting.
RM
RM
780274
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
26741
Erwin F. Evert
1994
6
5
156
U.S.A.
Montana
Carbon
[location and coordinates withheld]
1676
1707
Forb-grassland with Arnica fulgens, Balsamorhiza incana, Lupinus wyethii, and Zigadenus venenosus.
RM
RM
780453
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
27100
Erwin F. Evert
1994
6
15
166
U.S.A.
Montana
Madison
Henry's Lake Mountains: Gallatin National Forest: along Sheep Creek, ca 1 1/2 mi S of the Madison River.
-111.4266
44.8028
2012
2073
Openings in Douglas fir forest with Antennaria anaphaloides, Conimitella williamsii, Geum triflorum, and Fragaria vesca. Phenology: flowering.
RM
RM
781463
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
27289
Erwin F. Evert
1994
6
18
169
U.S.A.
Montana
Madison
Madison Valley: along west and east sides of U.S. Highway 287, ca 5 mi S of Cameron.
-111.6691
45.124
1658
Disturbed grassland with Melilotus officinalis, Agropyron spicatum, Stipa comata, and Erigeron pumilis. Phenology: flowering & fruiting.
RM
RM
782565
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
29055
Erwin F. Evert
1995
6
15
166
U.S.A.
Montana
Park
Paradise Valley: Gallatin National Forest: former Yankee Jim Campground, ca 13 mi NW of Gardiner.
-111.8679
45.1823
1585
Disturbed, rocky, open Douglas fir forest with Agropyron spicatum, Festuca idahoensis, Allium textile, and Lomatium triternatum. Phenology: flowering & fruiting.
RM
RM
782681
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
29200
Erwin F. Evert
1995
6
16
167
U.S.A.
Montana
Park
[location and coordinates withheld]
1676
1707
Sagebrush-grassland with Festuca idahoensis, Agropyron spicatum, Antennaria umbrinella, and Arenaria congesta. Phenology: flowering.
RM
RM
782711
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
29231
Erwin F. Evert
1995
6
17
168
U.S.A.
Montana
Park
Absaroka-Beartooth Mountains: Gallatin National Forest: ridge just N of the confluence of Anderson Creek and Mill Creek, ca 17 mi SE of Emigrant.
-110.4629
45.2667
1981
Opening in lodgepole pine forest with Phlox multiflora, Zigadenus venenosus, Microseris nutans, and Geum triflorum. Phenology: flowering.
RM
RM
782849
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
29373
Erwin F. Evert
1995
6
23
174
U.S.A.
Wyoming
Fremont
[location and coordinates withheld]
2225
Saltbush-forbland with Atriplex gardneri, Allium textile, Lomatium foeniculaceum, Penstemon eriantherus, and Artemisia pedatifida. Phenology: flowering & fruiting.
RM
RM
782892
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
29423
Erwin F. Evert
1995
6
23
174
U.S.A.
Wyoming
Fremont
[location and coordinates withheld]
2256
Saltbush steppe with Atriplex gardneri, Atriplex confertifolia, Phlox muscoides, and Carex filifolia. Phenology: flowering.
RM
RM
783730
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
29671
Erwin F. Evert
1995
6
25
176
U.S.A.
Wyoming
Fremont
Southeastern Absarokas: Shoshone National Forest: along the southeast side of Horse Creek ca 1/3 mi NE of Horse Creek Campground, ca 10 mi N of Dubois.
-109.62694
43.6758
2393
Sagebrush-grassland on calcareous substrate with Festuca idahoensis, Geum triflorum, Artemisia tridentata var. vaseyana, and some scattered limber pine and Douglas fir. Phenology: flowering.
RM
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
29847
Erwin F. Evert
1995
7
6
187
U.S.A.
Montana
Sweet Grass
Beartooth Mountains: Gallatin National Forest: along West Bridger Creek, ca 15 mi SSE of Big Timber.
-109.8607
45.618
1573
Meadow opening with Festuca idahoensis, Delphinium occidentale, Microsteris gracilis, and Arnica fulgens.
RM
RM
783560
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
30052
Erwin F. Evert
1995
7
8
189
U.S.A.
Montana
Sweet Grass
Beartooth Mountains: Gallatin National Forest: along East Boulder River, ca 4 mi ESE of East Boulder Campground, ca 24 mi S of Big Timber.
-110.087
45.5161
1875
Meadow opening in lodgepole pine-Douglas fir forest with Trifolium repens, Polygonum bistortoides, and Lupinus sericeus. Phenology: buds.
RM
RM
782258
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
30174
Erwin F. Evert
1995
7
17
198
U.S.A.
Montana
Park
Beartooth Mountains: Gallatin National Forest: Vernon Lake, ca 5 mi E of Cooke City.
-109.828
45.006
2408
Rock outcroppings west of lake; mostly vernally moist shallow soil over granitic bedrock with Allium brandegei, Lewisia triphylla, Danthonia intermedia, and Mimulus breweri. Phenology: flowering.
RM
RM
788732
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
30727
Erwin F. Evert
1996
6
4
156
U.S.A.
Montana
Carbon
Ridge 2.5 mi SW of Fromberg and 3/4 mi W of U.S. Highway 310.
-108.9352
45.3559
1150
Sagebrush-grassland with Atriplex confertifolia, Sarcobatus vermiculatus, and Carex filifolia. Phenology: flowering & fruiting.
RM
RM
788025
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
30866
Erwin F. Evert
1996
6
5
157
U.S.A.
Montana
Stillwater
Ridge ca 1/4 mi E of Montana Highway 78, 1 mi NE of Absarokee.
-109.4288
45.5306
1268
Disturbed sagebrush grassland with Allium textile, Agropyron spicatum, and Artemisia frigida. Phenology: flowering & fruiting.
RM
RM
787046
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
31081
Erwin F. Evert
1996
6
14
166
U.S.A.
Montana
Gallatin
Along East Gallatin River just N of the Burlington Northern tracks, 3 mi E of Bozeman.
-110.9714
45.6616
1493
Disturbed railroad right-of-way and cutbanks. Phenology: flowering & fruiting.
RM
RM
787180
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
31199
Erwin F. Evert
1996
6
14
166
U.S.A.
Montana
Park
Gallatin Range foothills: ridge 1/8-1/4 mi N of Cokedale Road, 6 mi W of Livingston.
-110.6834
45.6471
1554
1615
Grassland/forbland on south facing slope and rocky breaks with scattered juniper and limber pine. Phenology: flowering & fruiting.
RM
RM
787572
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
31348
Erwin F. Evert
1996
6
21
173
U.S.A.
Montana
Park
Absaroka Mountains foothills: Gallatin National Forest: 2 1/2 mi NE of Gardiner, 0-1/3 mi N of the Jardine Road.
-110.668
45.0513
1935
2012
Sagebrush-grassland on south facing slope with Artemisia nova, Agropyron spicatum, Koeleria macrantha, and Balsamorhiza sagittata. Phenology: flowering & fruiting.
RM
RM
787316
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
31454
Erwin F. Evert
1996
6
22
174
U.S.A.
Montana
Park
Absaroka-Beartooth Mountains: Gallatin National Forest: Casey Lake, 3 mi NE of Gardiner.
-110.668
45.0659
2189
Mesic-dry meadow above lake with Geum triflorum, Zigadenus venenosus, Festuca idahoensis, and Clematis hirsutissima. Phenology: flowering & fruiting.
RM
RM
788375
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
31803
Erwin F. Evert
1996
6
29
181
U.S.A.
Montana
Gallatin
Madison Range: Gallatin National Forest: ridge 1/2 mi E of Hell Roaring Creek and 1/2 mi W of Montana Highway 191, 26 mi SW of Bozeman.
-111.2387
45.4433
1756
Open Douglas fir forest and trail side with Festuca idahoensis, Physocarpus malvaceus, and Valeriana dioica var. sylvatica. Phenology: flowering & fruiting.
RM
RM
788716
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
32180
Erwin F. Evert
1996
7
19
201
U.S.A.
Montana
Park
Absaroka Mountains: Gallatin National Forest: along Bear Creek Trail, 1/2 to 1 mi E of Knox Lake (Castle), ca 13 mi NE of Gardiner.
-110.5862
45.1387
2439
Spruce-fir and lodgepole pine forest with Vaccinium scoparium, Thalictrum occidentale, and vaccinium membranaceum. Phenology: flowering & fruiting.
RM
RM
818270
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
32881
Erwin F. Evert
1997
6
11
162
U.S.A.
Montana
Carbon
Ridge immediately N of County Road 421 and E of Monahan Road, 1.3 mi W of Joliet.
-109.0175
45.487
1219
Disturbed ponderosa pine-grassland on sandstone outcroppings with Agropyron spicatum, Alyssum desertorum, and Bromus tectorum. Phenology: fruiting.
RM
RM
818530
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
33123
Erwin F. Evert
1997
6
21
172
U.S.A.
Wyoming
Hot Springs
Absaroka Mountains: ridge ca 1/3 mi N of the Middle Fork Owl Creek, ca 6 mi WNW of Anchor Reservoir; 40 mi WNW of Thermopolis.
-108.9429
43.6916
2164
Grassland with some Artemisia tridentata var. vaseyana, and with Koeleria macrantha and Carex filifolia as dominants. Phenology: flowering.
RM
RM
818791
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
33443
Erwin F. Evert
1997
6
28
179
U.S.A.
Montana
Park
Ridge and draw immediately E of the Yellowstone River, ca 2.5 mi S of Livingston.
1463
1493
Grassland with some scattered limber pine and Douglas fir. Phenology: flowering & fruiting.
RM
RM
820217
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
34827
Erwin F. Evert
1998
6
2
153
U.S.A.
Montana
Carbon
Wolf Canyon 1 mi S of the Yellowstone River, ca 14 mi WSW of Laurel.
-109.0381
45.5889
1097
1128
Sides of canyon in rocky open ponderosa pine forest with Agropyron spicatum, Festuca idahoensis, and Rhus trilobata in the understory. Phenology: flowering & fruiting.
RM
RM
820325
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
35158
Erwin F. Evert
1998
6
13
164
U.S.A.
Wyoming
Fremont
Bridger Mountains: along Birdseye Road in canyon 13 mi NE of Shoshoni.
-108.1022
43.4207
1859
Juniper woodland on limestone outcroppings with Heuchera parvifolia, Physocarpus monogynus, and Cymopterus terebinthinus. Phenology: flowering.
RM
RM
820595
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
35421
Erwin F. Evert
1998
7
1
182
U.S.A.
Montana
Park
Yellowstone National Park: northwest side of Mt. Everts, 3 mi SE of Gardiner.
-110.668
45.0077
2195
Meadow openings in Douglas fir forest with Cerastium arvense, Geum triflorum, and Zigadenus venenosus var. gramineus. Phenology: flowering & fruiting.
RM
RM
667061
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
1097
Amy J. Roderick B. E. Nelson
1997
6
25
176
U.S.A.
Wyoming
Carbon
[location and coordinates withheld]
2236
2256
Rough breaks of various sagebrushes with reclaimed areas. Phenology: fruiting.
RM
RM
820855
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
35725
Erwin F. Evert
1998
7
10
191
U.S.A.
Montana
Sweet Grass
Beartooth Mountains: Gallatin National Forest: along East Fork Boulder Trail, ca 3 mi SE of Box Canyon Guard Station, 45 mi SW of Big Timber.
-110.2171
45.3392
2250
Meadow openings in spruce-fir forest with Festuca idahoensis, Erigeron peregrinus, and Penstemon procerus. Phenology: flowering & fruiting.
RM
RM
822272
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
36491
Erwin F. Evert
1999
6
4
155
U.S.A.
Montana
Stillwater
Coal Mine Coulee, ca 10 mi SE of Columbus.
-109.1409
45.5743
1128
Grassland and open ponderosa pine forest with Koeleria macrantha, Agropyron spicatum, Bouteloua gracilis, and Balsamorhiza incana. Phenology: flowering & fruiting.
RM
RM
822408
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
36607
Erwin F. Evert
1999
6
5
156
U.S.A.
Montana
Stillwater
Ridge just N of the Huntley Creek Road, 4 mi SW of Columbus.
-109.326
45.618
1189
1219
Grassland and open ponderosa pine forest on south-facing slope with Koeleria macrantha, Cerastium arvense, Pediomelum esculentum, and Zigadenus venenosus var. gramineus. Phenology: flowering.
RM
RM
822424
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
36645
Erwin F. Evert
1999
6
5
156
U.S.A.
Montana
Sweet Grass
Ridge ca 1 mi S of the Yellowstone River and 2 mi WSW of Reed Point.
-109.5728
45.7053
1219
1250
Grassland and open ponderosa pine forest with Purshia tridentata, Geum triflorum, Arnica sororia, and Astragalus miser var. decumbens. Phenology: flowering.
RM
RM
822486
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
36716
Erwin F. Evert
1999
6
11
162
U.S.A.
Montana
Park
Absaroka Mountains: Yellowstone National Park: Black Canyon of the Yellowstone, along the Yellowstone River between Crevice Lake and Knowles Falls.
-110.5862
45.0077
1707
1737
Douglas fir forest and openings with Zigadenus venenosus var. gamineus, Geum triflorum, and Collinsia parviflora. Phenology: flowering & fruiting.
RM
RM
822610
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
36828
Erwin F. Evert
1999
6
20
171
U.S.A.
Wyoming
Park
Yellowstone Plateau: Yellowstone National Park: along the east side of Hellroaring Creek, ca 1 mi N of the Yellowstone River.
-110.4506
44.9649
2012
Sagebrush-grassland with Phlox longifolia, Festuca idahoensis, and Erigeron linearis. Phenology: flowering & fruiting.
RM
RM
822750
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
37025
Erwin F. Evert
1999
7
10
191
U.S.A.
Wyoming
Park
Absaroka Mountains: Yellowstone National Park: along Slough Creek Trail, ca 3 mi NE of trailhead.
-110.2877
44.9504
2012
Meadow openings in coniferous forest with Melica spectabilis, Stipa richardsonii, Hedysarum sulphurescens, and Helianthella uniflora. Phenology: flowering.
RM
RM
673355
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
31220
B. E. Nelson Laura Welp
1994
6
7
158
U.S.A.
Wyoming
Sweetwater
Great Divide Basin Area: Great Divide Basin: Windy Hill on Riner Cutoff or BLM Road 3203, ca 23 air mi NE of Wamsutter; ca 18.5 air mi WNW of Rawlins.
-107.6
41.847222
2088
2149
Steep banks of deep gully where snow drifts accumulate; with sagebrush and snowberry. Phenology: flowering & fruiting.
RM
RM
673357
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
1160
Laura Welp
1994
6
23
174
U.S.A.
Wyoming
Carbon
Great Divide Basin Area: Great Divide Basin: base and slopes of sandstone rim by Separation Creek, ca 16.5 air mi SW of Rawlins; ca 14 air mi SE of Creston Junction.
-107.479722
41.643889
2164
2195
Narrow, shaded drainage with steep sloughing sides; sagebrush and tall graminoids dominant. Phenology: fruiting.
RM
RM
673356
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
1804
Laura Welp
1994
7
6
187
U.S.A.
Wyoming
Fremont
[location and coordinates withheld]
2201
2219
Side of slough and associated drainage on north-facing slope; grazed graminoids dominant, forbs diverse; moist, silty, rocky soil. Phenology: flowering.
RM
RM
673360
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
295
Laura Welp
1994
6
13
164
U.S.A.
Wyoming
Fremont
Great Divide Basin Area: Sweetwater River Drainage: north of Silver Creek, ca 14 air mi E of Atlantic City; ca 19 air mi NE of Continental Peak.
-108.4692
42.4889
2192
2225
Draws and depressions where moisture persists; dry sandy soil; dense, low sagebrush and snowberry dominant; forbs in shelter of shrubs. Phenology: flowering & fruiting.
RM
RM
673359
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
711
Laura Welp
1994
6
18
169
U.S.A.
Wyoming
Fremont
Great Divide Basin Area: Sweetwater River Drainage: Dickie Spring and moist drainage, ca 4.5 air mi N of Oregon Buttes; ca 8 air mi WNW of Continental Peak.
-108.8558
42.3008
2335
Moist edge of spring; dense grasses and Juncus dominant, forbs diverse; moist, peaty soil, sandy in some areas. Phenology: flowering.
RM
RM
673358
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
824
Laura Welp
1994
6
20
171
U.S.A.
Wyoming
Fremont
Great Divide Basin Area: Green Mountain: near West Cottonwood Creek, ca 6.5 air mi ENE of Crooks Peak; ca 12.5 air mi W of Three Forks.
-107.765
42.4131
2140
2164
Bottom of drainage; dense graminoids dominant; moist, dark soil. Phenology: flowering & fruiting.
RM
RM
673354
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
46164
Ronald L. Hartman
1994
6
21
172
U.S.A.
Wyoming
Fremont
Great Divide Basin Area: Green Mountain, ca 7 air mi W of Muddy Gap.
-107.6097
42.3547
2134
2256
Streamside, rocky slopes, and lodgepole pine covered slopes. Phenology: fruiting.
RM
RM
674874
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
35613
B. E. Nelson
1995
6
26
177
U.S.A.
Wyoming
Carbon
Great Divide Basin Area: Great Divide Basin: W of U.S. Hwy 287 ca 1.5 air mi NW of Ninemile Hill on the Continental Divide, ca 10 air mi NNW of Rawlins.
-107.3181
41.9208
2182
2265
Stony sagebrush-grassland with Artemisia nova. Phenology: fruiting.
RM
RM
674875
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
35682
B. E. Nelson
1995
6
27
178
U.S.A.
Wyoming
Fremont
Great Divide Basin Area: Green Mountain: Stratton Rim on the southeast end of Green Mountain ca 4 air mi WSW of Whiskey Peak; ca 16.5 air mi SE of Jeffrey City; ca 5.5 air mi NW of Bairoil.
-107.6464
42.2969
2500
2652
Stony toe ridge with sagebrush on the lee side of the rim. Phenology: flowering.
RM
RM
674876
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
5570
Laura Welp
1995
6
22
173
U.S.A.
Wyoming
Carbon
[location and coordinates withheld]
2189
2237
Partially vegetated west facing slope with grasses and scattered low sagebrush; sandy soil with sandstone outcrops. Phenology: flowering & fruiting.
RM
RM
674877
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
5850
Laura Welp
1995
6
30
181
U.S.A.
Wyoming
Sweetwater
Great Divide Basin Area: Great Divide Basin: Cyclone Rim, ca 9.5 air mi NE of Bastard Butte; ca 4.5 air mi SW of Flattop Buttes.
-108.2261
42.2267
2176
2225
Drainage on south facing slope of rim with sagebrush; fine soil with gravel. Phenology: flowering & fruiting.
RM
RM
674878
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
5903
Laura Welp
1995
7
1
182
U.S.A.
Wyoming
Fremont
Great Divide Basin Area: Great Divide Basin: rimtop ca 3 air mi NNE of Continental Peak; ca 11 air mi WSW of St. Marys Peak.
-108.6806
42.315
2286
2353
Partially vegetated west facing slope of wide draw on rim with rocky sandstone soil. Phenology: flowering & fruiting.
RM
RM
674879
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
5947
Laura Welp
1995
7
1
182
U.S.A.
Wyoming
Fremont
Great Divide Basin Area: Great Divide Basin: ca 8 air mi ENE of Continental Peak; ca 7 air mi SW of St. Marys Peak.
-108.5642
42.3142
2256
2329
Steep south facing slope on rim; silty, rocky soil. Phenology: flowering & fruiting.
RM
RM
674880
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
6122
Laura Welp
1995
7
7
188
U.S.A.
Wyoming
Fremont
Great Divide Basin Area: Great Divide Basin: slopes of Continental Peak, ca 7 air mi E of Oregon Buttes; ca 11 air mi W of Circle Bar Lake.
-108.7778
42.2864
2329
2414
Sagebrush swale on north facing slope of peak; rocky soil. Phenology: flowering & fruiting.
RM
RM
674881
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
6406
Laura Welp
1995
7
15
196
U.S.A.
Wyoming
Fremont
Great Divide Basin Area: Popo Agie River Drainage: Dilabaugh Buttes and Dilabaugh Spring, ca 6 air mi W of Schoettlin Mountain; ca 12 air mi E of Roundtop Mountain.
-108.5119
42.5317
2103
2225
Moist spring at base of buttes with dense graminoids, willows, and aspen; organic soil. Phenology: flowering & fruiting.
RM
RM
674873
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
6979a
Laura Welp
1995
7
31
212
U.S.A.
Wyoming
Fremont
Great Divide Basin Area: Great Divide Basin: ca 4 air mi W of Continental Peak; ca 5 air mi NE of Oregon Buttes.
-108.7778
42.2864
2308
2317
Spring at base of slope; dense graminoids, organic soil. Phenology: flowering & fruiting.
RM
RM
667060
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
1495
Amy J. Roderick
1997
6
30
181
U.S.A.
Wyoming
Carbon
Upper North Platte and Laramie River Drainages: Freezeout Mountains: ca 1 air mi from junction of Wyo Hwy 77 and Wyo Hwy 487, ca 22 air mi NW of Medicine Bow.
-106.2672
42.1807
2121
Sagebrush grassland. Phenology: fruiting.
RM
RM
655131
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
51030
Ronald L. Hartman Stuart Markow
1995
6
22
173
U.S.A.
Wyoming
Teton
Mount Leidy Highland Area: South Fork Ditch Creek, ca 0.2-1 air mi upstream from Ditch Creek Road.
-110.5565
43.6916
2225
2271
Moist stream bottom. Phenology: flowering.
RM
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
51278
Ronald L. Hartman
1995
6
26
177
U.S.A.
Wyoming
Teton
Mount Leidy Highland Area: Gros Ventre River Road, ca 2 air mi E of Forest boundary; just W to overlooking Slide Lake, on the N side.
2256
2378
Steep slopes with outcrops of sandstone and limestone. Phenology: flowering & fruiting.
RM
RM
785998
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
2596.1
Paul B. Marcum Daniel T. Busemeyer, Mary Ann Feist, Loy R. Phillippe
2004
6
17
169
U.S.A.
Wyoming
Washakie
Tensleep Preserve, The Nature Conservancy: southwest flank, foothills of the Big Horn Mountains, ca 10 mi E of Ten Sleep. Onion Gulch quad.
-107.2015
44.0035
2181
Growing on an open gently sloping west-facing ridgeline; associates include Artemisia tridentata, Juniperus scopulorum, Lupinus sp., Geum triflorum, and Delphinium nuttallianum. Phenology: flowering & fruiting.
RM
RM
667059
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
1532
Amy J. Roderick Pamela Foster
1997
7
3
184
U.S.A.
Wyoming
Fremont
Upper North Platte and Laramie River Drainages: E of Agate Flat or BLM Road 2404, ca 15.7 air mi NW of Three Forks Junction; ca 9 air mi NE of Jeffrey City.
-107.6714
42.4966
1920
1935
Sagebrush grassland in sandy soil. Phenology: fruiting.
RM
RM
667058
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
1611
Amy J. Roderick
1997
7
3
184
U.S.A.
Wyoming
Natrona
Upper North Platte and Laramie River Drainages: Middle Fork Sage Hen Creek S of Beaver Divide and W of Rattlesnake Hills, 21.2 road mi NE along Agate Flat or BLM Road 2404 from U.S. Hwy 287.
-107.4748
42.7589
2195
2210
Riparian area along creek. Phenology: flowering & fruiting.
RM
RM
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
50774
B. E. Nelson Joy Handley
2000
7
16
198
U.S.A.
Idaho
Adams
Payette National Forest and Vicinity: West Mountains: just NNE of Potato Knob below Forest Road 214, ca 15 air mi SE of Council; ca 21 air mi E of Cambridge.
-116.2596
44.5494
1731
1768
Low areas and drainage channels in semibarren volcanic field. Phenology: flowering & fruiting.
RM
RM
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
3986
Joy Handley
2000
5
21
142
U.S.A.
Idaho
Idaho
Payette National Forest and Vicinity: Salmon River Canyon: Vinegar Creek boat ramp to Huntz Gulch along Forest Road 103, ca 13 air mi N of Burgdorf; ca 11-14 air mi ENE of Riggins Hot Springs.
-115.9114
45.4648
579
640
North facing slope of river canyon dominated by Pinus ponderosa and Pseudotsuga menziesii. Phenology: flowering.
RM
RM
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
4156
Joy Handley
2000
5
23
144
U.S.A.
Idaho
Adams
Payette National Forest and Vicinity: Weiser River Valley: along old U.S. Hwy 95 S of Fruitvale, ca 4.5-5.5 air mi N of Council; ca 14 air mi SSW of New Meadows.
-116.4215
44.7956
914
Roadside grass and shrubland. Phenology: flowering.
RM
RM
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
4347
Joy Handley
2000
5
27
148
U.S.A.
Idaho
Washington
Payette National Forest and Vicinity: Hitt Mountains: area around open pit mine between heads of 4th of July and Dennett creeks, ca 16 air mi NW of Midvale; ca 18 air mi W of Cambridge.
-117.049
44.5639
1554
1737
Steep, mostly southwest-facing hillside dominated by Elymus spicatus and Lupinus. Phenology: flowering.
RM
RM
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
4418
Joy Handley
2000
7
28
210
U.S.A.
Idaho
Washington
Payette National Forest and Vicinity: Buckwheat Flats Research Natural Area: along Sage Creek, ca 5 air mi SW of Midvale; ca 12 air mi SW of Cambridge.
-116.8428
44.4468
914
1036
Steep canyon slopes dominated by Elymus spicatus and other grasses. Phenology: flowering & fruiting.
RM
RM
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
4651
Joy Handley
2000
6
1
153
U.S.A.
Idaho
Adams
Payette National Forest and Vicinity: Hells Canyon-Seven Devils Scenic Area: along Forest Road 454 at Schoolmarm Gulch, ca 7 air mi N of Cuprum; ca 16 air mi NNE of Oxbow Dam.
-116.7079
45.1874
548
640
Roadside of steep canyon dominated by grasses and shrubs, especially Rhus. Phenology: flowering & fruiting.
RM
RM
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
4868
Joy Handley
2000
6
4
156
U.S.A.
Idaho
Washington
Payette National Forest and Vicinity: Hitt Mountains: along logging road off Forest Road 573 (Hill Creek Road); ca 10 air mi NW of Midvale; ca 11 air mi W of Cambridge.
-116.9073
44.5494
1600
1737
Open Pseudotsuga menziesii with xeric forbs and grasses. Phenology: flowering.
RM
RM
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
4994
Joy Handley
2000
6
8
160
U.S.A.
Idaho
Washington
Payette National Forest and Vicinity: Hitt Mountains: along logging road just E of Wash Pan Creek, ca 13 air mi NW of Cambridge; ca 23 air mi WSW of Council.
-116.887
44.6653
1524
1615
Mixed conifer overstory with many areas of recent timber harvest. Phenology: flowering & fruiting.
RM
RM
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
5074
Joy Handley
2000
6
10
162
U.S.A.
Idaho
Washington
Payette National Forest and Vicinity: Weiser River Valley: along Keith Creek Road just W of Shoe Peg Valley, ca 5.5 air mi NW of Midvale; ca 8 air mi SW of Cambridge.
-116.8263
44.5205
945
1097
Open grass and shrub dominated rangeland. Phenology: fruiting.
RM
RM
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
5300
Joy Handley Denise L. Fairbanks
2000
6
13
165
U.S.A.
Idaho
Washington
Payette National Forest and Vicinity: Hitt Mountains: along 4WD trail at the top of Neil Gulch, just N of Arrowhead Spring, ca 17 air mi NW of Cambridge; ca 19 air mi NW of Midvale.
-116.9882
44.6798
1524
1692
Pinus ponderosa plantation (approx. 25 yrs old) in mixed conifer forest. Phenology: flowering & fruiting.
RM
RM
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
5452
Joy Handley Denise L. Fairbanks
2000
6
15
167
U.S.A.
Idaho
Valley
Payette National Forest and Vicinity: Long Valley: Ponderosa State Park: N of McCall, ca 10 air mi E of New Meadows.
-116.0758
44.9554
1524
Mixed conifer forest with open meadows and marshes. Phenology: flowering & fruiting.
RM
RM
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
5592
Joy Handley Denise L. Fairbanks
2000
6
17
169
U.S.A.
Idaho
Adams
Payette National Forest and Vicinity: Salmon River Mountains: Bear Basin and along Forest Road 452, ca 4 air mi NW of McCall; ca 7 air mi ESE of New Meadows.
-116.137
44.9554
1615
1646
Roadside, moist, mixed conifer overstory. Phenology: flowering.
RM
RM
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
5650
Joy Handley
2000
6
19
171
U.S.A.
Idaho
Adams
Payette National Forest and Vicinity: Weiser River Valley: just NE of Granger Butte, ca 7 air mi S of Indian Valley; ca 15 air mi SE of Cambridge.
-116.4236
44.4613
1036
Grass and shrub rangeland. Phenology: flowering & fruiting.
RM
RM
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
5708
Joy Handley
2000
6
20
172
U.S.A.
Idaho
Adams
Payette National Forest and Vicinity: Salmon River Mountains: west-facing slope of Meadows Hill, just N of Fish Lake, ca 5 air mi SE of New Meadows; ca 6 air mi W of McCall.
-116.2185
44.9119
1463
1585
West-facing grassy slope. Phenology: flowering & fruiting.
RM
RM
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
6007
Joy Handley Phillip G. Lawrence
2000
6
25
177
U.S.A.
Idaho
Washington
Payette National Forest and Vicinity: Cuddy Mountains: Cuddy Mountain, just S of East Brownlee Creek, ca 14 air mi NNE of Cambridge; ca 18 air mi W of Council.
-116.7858
44.7522
1737
1920
Overstory dominated by Pseudotsuga menziesii with patches of Populus tremuloides. Phenology: flowering.
RM
RM
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
6093
Joy Handley Phillip G. Lawrence
2000
6
27
179
U.S.A.
Idaho
Washington
Payette National Forest and Vicinity: Cuddy Mountains: Boundary Trail, just S of Grizzly Basin, ca 8 air mi N of Cambridge; ca 13 air mi W of Council. Also SE/14
-116.6846
44.6943
1219
1432
Mostly south-facing slopes along fence line with moist drainages. Phenology: flowering & fruiting.
RM
RM
667057
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
1668
Amy J. Roderick
1997
7
3
184
U.S.A.
Wyoming
Fremont
Upper North Platte and Laramie River Drainages: Cranner Rock N of U.S. Hwy 287, ca 9.3 air mi NW of Three Forks Junction; ca 16.8 air mi ESE of Jeffrey City.
-107.5534
42.4529
1920
Sandy area dominated by sagebrush at the base of granite rocks. Phenology: fruiting.
RM
RM
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
1271
Joy Handley
1999
7
1
182
U.S.A.
Idaho
Washington
Payette National Forest and Vicinity: Cuddy Mountains Area: Forest Road 048 between Olive and Dry creeks, ca 11.5 air mi NW of Council; ca 18 air mi N of Cambridge.
-116.6239
44.8242
1341
1432
Ridge and northwest-facing slope; basalt soil; Elymus spicatus/Festuca idahoensis with mixed shrubs and scattered Pinus ponderosa. Phenology: flowering & fruiting.
RM
RM
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
1801
Joy Handley
1999
7
12
193
U.S.A.
Idaho
Adams
Payette National Forest and Vicinity: Smith Mountain just SW of lookout on Forest Road 073, ca 10 air mi NNE of Bear; ca 19 air mi NW of New Meadows.
-116.6059
45.1294
2073
2164
Rocky outcrops in open, subalpine meadow; with Festuca idahoensis and Artemisia tridentata. Phenology: flowering & fruiting.
RM
RM
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
33
Joy Handley
1999
6
8
159
U.S.A.
Idaho
Washington
Payette National Forest and Vicinity: Lorton Pass Gulch above Mill Creek Road and Blue Spring Creek, ca 10.5 air mi WNW of Cambridge; ca 13 air mi NW of Midvale.
-116.887
44.6215
1341
1432
Riparian area of steep walled, rocky, ephemeral stream; basalt soil; dominated by Physocarpus malvaceus/Prunus emarginata in Artemisia tridentata/Purshia tridentata/Elymus spicatus grassland. Phenology: flowering.
RM
RM
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
465
Joy Handley
1999
6
18
169
U.S.A.
Idaho
Adams
Payette National Forest and Vicinity: above Fawn Creek, above Forest Road 123, ca 15 air mi WNW of New Meadows; ca 21 air mi NNW of Council.
-116.5855
45.0134
1615
1676
Rocky basalt soil; grassland dominated by Elymus spicatus, Allium tolmiei var. persimile, also Balsamorhiza sagittata and Artemisia tripartita; south to southwest-facing slope, moderately steep. Phenology: flowering.
RM
RM
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
550
Joy Handley
1999
6
19
170
U.S.A.
Idaho
Adams
Payette National Forest and Vicinity: West Mountains Area: above Forest Road 180, near Fourbit Creek, ca 11 air mi SE of Indian Valley; ca 20 air mi SSE of Council.
-116.6059
44.9989
1631
1737
Steep, mostly south-facing slope; rocky basalt soil, much of it moist from seeps; dominated by Artemisia ludoviciana, Lomatium, and Allium tolmiei var. persimile. Phenology: flowering.
RM
RM
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
92
Joy Handley
1999
6
8
159
U.S.A.
Idaho
Washington
Payette National Forest and Vicinity: Middle Brownlee Creek Road, above Middle Brownlee Creek and below road, ca 14.5 air mi NW of Cambridge; ca 18.5 air mi NNW of Midvale.
-116.9072
44.7084
1219
1250
Bench and ridge; basalt, rocky soil; Artemisia tridentata/Purshia tridentata/Elymus spicatus with scattered Pinus ponderosa. Phenology: flowering & fruiting.
RM
RM
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
64229
Ronald L. Hartman Joy Handley
1999
6
1
152
U.S.A.
Idaho
Adams
Payette National Forest and Vicinity: road to Blue Creek and mouth of Indian Creek along Snake River.
-116.8302
44.9844
524
646
Dry canyonland, dispersed powerline road, sumac/annual grass, rocky volcanic soil. Phenology: flowering & fruiting.
RM
RM
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
64292
Ronald L. Hartman Joy Handley
1999
6
2
153
U.S.A.
Idaho
Adams
Payette National Forest and Vicinity: trail from Eagle Bar to Red Ledge Mine along Snake River, 18 air mi W of Pinehurst.
-116.7099
45.2179
536
987
Rocky volcanic canyon land along river; Elymus spicatus and annual grasses with scattered shrubs. Phenology: flowering.
RM
RM
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
64494
Ronald L. Hartman Joy Handley
1999
6
5
156
U.S.A.
Idaho
Washington
Payette National Forest and Vicinity: Dennett Creek, 3-6 mi E of Snake River.
-117.0894
44.5636
890
1402
Sagebrush slopes, streamside, juniper and Douglas fir above on gravelly shale. Phenology: flowering & fruiting.
RM
RM
667056
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
1716
Amy J. Roderick
1997
7
5
186
U.S.A.
Wyoming
Carbon
Upper North Platte and Laramie River Drainages: Ferris Mountains: south side below Youngs Pass, ca 31 air mi N of Rawlins; ca 11 air mi SE of Three Forks Junction.
-107.2991
42.253
2408
Limber pine and Douglas fir with red sandy soil and big sagebrush. Phenology: fruiting.
RM
RM
571889
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
425
Nancy Kastning Lee Huston and Sunny Kastning
1988
6
30
182
U.S.A.
Wyoming
Carbon
Sierra Madre/Park Range: Sierra Madre: ca 6 air mi E of Divide Peak.
-107.0122
41.3015
2698
Riparian habitat. Phenology: flowering.
RM
RM
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
23641
Ronald L. Hartman Nancy Kastning
1988
6
14
166
U.S.A.
Wyoming
Carbon
Sierra Madre/Park Ranges: Sierra Madre: ca 14 air mi NNW of Bridger Peak.
-107.2023
41.3885
2408
Shortgrass prairie on bench land high in calcium carbonate; on slopes.
RM
RM
608689
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
45438
Ronald L. Hartman Tom Cramer and Charmaine Refsdal
1994
5
26
146
U.S.A.
Wyoming
Lincoln
Southern Salt River Range and Vicinity: Hams Fork Plateau: Dempsey Ridge Road, ca 5 air mi NW of Kemmerer.
-109.4553
41.8678
2195
2256
Sagebrush slopes, rock outcrops, and windswept ridges. Phenology: flowering.
RM
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
45492
Ronald L. Hartman Tom Cramer and Charmaine Refsdal
1994
5
26
146
U.S.A.
Wyoming
Lincoln
Southern Salt River Range and Vicinity: Hams Fork Plateau: Schuster Basin, ca 14 air mi NW of Kemmerer.
-110.737778
41.931944
2256
2378
Sagebrush slopes, steep calcareous outcrops on slumped slopes, and aspen woodlands. Phenology: flowering.
RM
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
45646
Ronald L. Hartman Tom Cramer
1994
5
28
148
U.S.A.
Wyoming
Lincoln
Southern Salt River Range and Vicinity: Wheat Creek to Windy Gap and Oyster Ridge, ca 14 air mi N of Kemmerer.
-110.505
41.999722
2256
2439
Sagebrush slopes, sandstone and limestone outcrops, cushion plant communities on ridge, wet draws, and stream margins. Phenology: flowering.
RM
RM
608686
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
45712
Ronald L. Hartman Tom Cramer
1994
5
28
148
U.S.A.
Wyoming
Lincoln
Southern Salt River Range and Vicinity: badlands area ca 1 air mi N of Round Mountain; ca 11 air mi NE of Kemmerer.
-110.4019
41.9006
2134
2280
Partially barren slopes with shrubs in ravines, cushion plant communities, and redbeds. Phenology: flowering.
RM
RM
644313
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
35804
B. E. Nelson
1995
6
29
180
U.S.A.
Wyoming
Lincoln
Southern Salt River Range and Vicinity: Sublette Range: ridge between Mill and Corral creeks, ca 7 air mi NNE of Cokeville; ca 32.5 air mi NW of Kemmerer.
-110.9035
42.1809
2048
2097
Sagebrush-grassland slopes. Phenology: flowering.
RM
RM
644312
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
35935
B. E. Nelson
1995
6
30
181
U.S.A.
Wyoming
Lincoln
Southern Salt River Range and Vicinity: Salt River Range: along Smiths Fork at and above the mouth of Hobble Creek, ca 20 air mi N of Cokeville; ca 44 air mi NNW of Kemmerer.
-110.8496
42.3841
2118
2256
Sagebrush slope on the lee side of the ridge. Phenology: flowering.
RM
RM
644314
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
5419
Thomas Cramer
1995
6
3
154
U.S.A.
Wyoming
Lincoln
Southern Salt River Range and Vicinity: ca 3 air mi N of Sage at Boulder Ridge.
-110.9567
41.852
1920
2073
Rocky sagebrush hillside. Phenology: flowering.
RM
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
622
Kevin J. Taylor
1997
5
26
146
U.S.A.
Colorado
Delta
Northern Gunnison Basin: ca 5 air mi NNE of Crawford.
-107.5639
38.7636
2286
2591
Pinyon-juniper and oak scrub. Phenology: flowering.
RM
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
767
Kevin J. Taylor
1997
6
1
152
U.S.A.
Colorado
Delta
Northern Gunnison Basin: ca 5 air mi NE of Crawford.
-107.5266
38.7489
2439
2591
Oak shrubland with interspersed Peraphyllum and Amelanchier. Phenology: flowering & fruiting.
RM
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
56269
Ronald L. Hartman Kevin J. Taylor
1997
5
16
136
U.S.A.
Colorado
Delta
Northern Gunnison Basin: Elephant Hill, west portion, ca 2.5 air mi ESE of Paonia.
-107.5453
38.8516
1774
2048
Squaw-apple, serviceberry, mountain mahogany, and juniper zone below and sparsely vegetated shale slopes above with some pinyon-juniper. Phenology: flowering & fruiting.
RM
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
56359
Ronald L. Hartman Kevin J. Taylor
1997
5
17
137
U.S.A.
Colorado
Delta
Northern Gunnison Basin: Jumbo Mountain, ca 4 air mi ENE of Paonia.
-107.5266
38.8956
2225
2393
Squaw-apple and serviceberry zone and pinyon-juniper slopes above with sandstone and shales. Phenology: flowering.
RM
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
56396
Ronald L. Hartman Kevin J. Taylor
1997
5
17
137
U.S.A.
Colorado
Delta
Northern Gunnison Basin: ca 4.5-7 air mi E to ESE Hotchkiss.
-107.6198
38.7929
1707
2097
Rolling hills with sagebrush and saltflats, ridges with some pinyon-juniper. Phenology: fruiting.
RM
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
56529
Ronald L. Hartman Kevin J. Taylor
1997
5
19
139
U.S.A.
Colorado
Delta
Northern Gunnison Basin: Needle Rock, south and east slopes to north side, rock face, ca 3.5 mi NE of Crawford.
-107.5453
38.7196
2103
2225
Boulder slopes and shrub zone where soil developed. Phenology: flowering.
RM
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
56620
Ronald L. Hartman Kevin J. Taylor
1997
5
20
140
U.S.A.
Colorado
Montrose
[location and coordinates withheld]
2225
2256
Juniper woodland, severely disturbed. Phenology: flowering.
RM
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
56664
Ronald L. Hartman Kevin J. Taylor
1997
5
20
140
U.S.A.
Colorado
Delta
Northern Gunnison Basin: Youngs Peak and lower intrusive mountain immediately SE; adjacent to Crawford.
-107.6011
38.7049
2012
2256
Pinyon-juniper woodland. Phenology: flowering & fruiting.
RM
775823
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
4923
Kevin J. Taylor
1998
5
15
135
U.S.A.
Colorado
Delta
Northern Gunnison Basin: ca 4 air mi NW of Crawford.
-107.657
38.7489
1661
Sagebrush and saltbush meadow. Phenology: flowering.
RM
775822
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
5028
Kevin J. Taylor
1998
5
19
139
U.S.A.
Colorado
Montrose
Northern Gunnison Basin: along north edge of Gould Reservoir, ca 7 air mi SSE of Crawford.
-107.5842
38.6122
2149
2240
Juniperus, pinyon pine, Amelanchier, and Symphoricarpos. Phenology: flowering.
RM
775821
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
5044
Kevin J. Taylor
1998
5
19
139
U.S.A.
Colorado
Montrose
Northern Gunnison Basin: slope north of Gould Reservoir, ca 6.5 air mi SSE of Crawford.
-107.5842
38.6122
2195
2286
Juniperus, pinyon pine, Amelanchier, and Symphoricarpos. Phenology: flowering.
RM
RM
667055
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
1880
Amy J. Roderick
1997
7
7
188
U.S.A.
Wyoming
Carbon
Upper North Platte and Laramie River Drainages: Freezeout Mountains: west end of range S of Red Draw, ca 14 air mi NW of Medicine Bow townsite.
-106.3527
42.0676
2134
Sagebrush/snowberry draw in sandy soil. Phenology: fruiting.
RM
728765
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
1216
C. Lynn Kinter Eric Inberg
1995
6
24
175
U.S.A.
Wyoming
Fremont
Upper Wind River Watershed: Spring Mountain: ca 6 air mi NNE of Dubois; south face of Spring Mountain, near spring.
2489
Grassland. Plot 93047 CW1/2, NE, SW Phenology: flowering.
RM
RM
728762
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
235
C. Lynn Kinter Susanne Neumiller
1994
6
7
158
U.S.A.
Wyoming
Fremont
Upper Wind River Watershed: Dennison Mountain exclosure: ca 9 air mi NE of Dubois; inside elk exclosure.
2451
Grassland. Plot 94001 NW, NW, SW Phenology: flowering & fruiting.
RM
728766
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
2442
C. Lynn Kinter John Tamsen
1997
5
17
137
U.S.A.
Wyoming
Fremont
Upper Wind River Watershed: Wind River Badlands, Mason Draw: ca 1.5 air mi NE of Dubois.
2182
Plot spans a gully at the bottom of a steep draw in sagebrush. Plot 94009 SE, NE, C Phenology: buds.
RM
728767
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
2472
C. Lynn Kinter John Tamsen
1997
6
7
158
U.S.A.
Wyoming
Fremont
Upper Wind River Watershed: Mason Draw grassland: ca 2 air mi NE of Dubois; old 2-track, which is the beginning of a nature trail; at fence corner, and just before trail leaves 2-track, go left (N) ca 50yds.
2234
Grassland. Plot 94008 NE, NE, NW Phenology: flowering.
RM
728768
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
2585
C. Lynn Kinter
1997
7
3
184
U.S.A.
Wyoming
Fremont
Upper Wind River Watershed: bench above Tappan Creek: ca 2.3 mi N of Dubois; E of 2-track that runs up through draw.
-109.6446
43.57533
2246
Sagebrush. Plot 94012 SW, NW, NE Phenology: fruiting.
RM
728763
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
350
C. Lynn Kinter Susanne Neumiller
1994
6
15
166
U.S.A.
Wyoming
Fremont
Upper Wind River Watershed: Mason Draw grassland: ca 2 air mi NE of Dubois; old 2-track, which is the beginning of a nature trail; at fence corner, and just before trail leaves 2-track, go left (N) ca 50yds.
-109.60574
43.54986
2234
Grassland. Plot 94008 NE, NE, NW Phenology: flowering & fruiting.
RM
728764
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
431
C. Lynn Kinter Chris Queen
1994
6
23
174
U.S.A.
Wyoming
Fremont
Upper Wind River Watershed: bench above Tappan Creek, ca 2.3 mi N of Dubois; E of 2-track that runs up through draw.
2246
Sagebrush. Plot 94012 SW, NW, NE Phenology: fruiting.
RM
RM
560031
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
3560
Robert S. Kirkpatrick
1984
7
5
187
U.S.A.
Wyoming
Park
Absaroka Mountains: ca 18 air mi WSW of Meeteetse, West Fork Timber Creek, ca 1 mi W of the Timber Creek Ranger Station.
-109.2035
44.0428
2286
2408
Meadows with scattered Potentilla fruticosa; dry areas.
RM
RM
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
60541
B. E. Nelson Grace Kostel
2004
5
14
135
U.S.A.
South Dakota
Fall River
Buffalo Gap National Grassland and Vicinity: breaks ca 12.5 air mi ESE of Oelrichs.
-103.0053
43.1141
975
1030
Clay flats below the breaks. Phenology: flowering.
RM
RM
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
60575
B. E. Nelson Grace Kostel
2004
5
14
135
U.S.A.
South Dakota
Fall River
Buffalo Gap National Grassland and Vicinity: along South Branch Blacktail Creek, ca 10.5 mi ESE of Oelrichs.
-103.0362
43.1452
945
963
Grassy slopes. Phenology: flowering.
RM
RM
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
60632
B. E. Nelson Grace Kostel
2004
5
14
135
U.S.A.
South Dakota
Fall River
Buffalo Gap National Grassland and Vicinity: ridge N of School Section Creek, ca 2.5 air mi E of Windy Butte, ca 6.5 air mi NE of Oelrichs.
-103.1349
43.2475
1010
1036
Grassy slopes and stony top of small buttes. Phenology: flowering.
RM
RM
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
60662
B. E. Nelson Grace Kostel
2004
5
17
138
U.S.A.
Nebraska
Dawes
Oglala National Grassland and Vicinity: Carlsen Butte, ca 8.5-9 air mi N of Crawford.
-103.3867
42.8074
1091
1120
Grasslands with some badlands on the slopes and draws. Phenology: flowering.
RM
RM
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
60680
B. E. Nelson Grace Kostel
2004
5
17
138
U.S.A.
Nebraska
Dawes
Oglala National Grassland and Vicinity: west end of Wolf Butte, ca 19.5 air mi N of Crawford.
-103.4629
42.9653
1204
1237
Stony grassy slopes. Phenology: flowering.
RM
RM
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
60722
B. E. Nelson Grace Kostel
2004
5
17
138
U.S.A.
Nebraska
Dawes
Oglala National Grassland and Vicinity: S of Sugarloaf or Forest Road 900, just E and NE of Strawstack Butte, ca 16.5 air mi NNE of Crawford.
-103.4733
42.9188
1140
1189
Mosiac of grassland, badlands, rocky slopes of clay, and drainage bottoms. Phenology: flowering.
RM
RM
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
60765
B. E. Nelson Grace Kostel
2004
5
17
138
U.S.A.
Nebraska
Dawes
Oglala National Grassland and Vicinity: off Toadstool Road just N of Sand Creek, ca 8.5 air mi NNE of Crawford.
-103.4634
42.7987
1112
Silty clay flats in badlands. Phenology: flowering.
RM
RM
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
61032
B. E. Nelson Grace Kostel
2004
5
24
145
U.S.A.
South Dakota
Fall River
Buffalo Gap National Grassland and Vicinity: near the head of Mule Creek, ca 5.5 air mi E of Ardmore; ca 19 air mi SW of Oelrichs.
-103.5396
43.0335
1097
1149
Stony clay grassland slopes. Phenology: flowering & fruiting.
RM
RM
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
1041
Grace M. Kostel
2004
6
1
153
U.S.A.
South Dakota
Pennington
Buffalo Gap National Grassland and Vicinity: ca 4-5 air mi SSE of Scenic on Forest Road 7172 on Big Hollow Creek.
-102.511833
43.730333
847
884
On sideslopes of creek and grassy upslopes near creek. Phenology: fruiting.
RM
RM
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
1100
Grace M. Kostel
2004
6
1
153
U.S.A.
South Dakota
Jackson
Buffalo Gap National Grassland and Vicinity: ca 2-2.5 mi E of Interior and 0.5 mi S of Badlands National Park Headquarters.
-101.9085
43.707833
701
Typical badlands topography and landscape, on sand and clay soils. Phenology: fruiting.
RM
RM
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
1165
Grace M. Kostel
2004
6
1
153
U.S.A.
South Dakota
Jackson
Buffalo Gap National Grassland and Vicinity: ca 9 mi W of Kadoka.
-101.6687
43.8012
823
Typical badlands topography, area is cut by meandering ephemeral streams and areas of grass; soils are heavy, white clay. Phenology: fruiting.
RM
RM
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
1252
Grace M. Kostel
2004
6
2
154
U.S.A.
South Dakota
Pennington
Buffalo Gap National Grassland and Vicinity: ca 4.5-5 air mi SE of Wall, 2-2.5 mi S of I-90, channel draining into Whitewater Creek..
-102.184833
43.928833
807
838
On badlands in deep channel draining into creek; soils of white, heavy clays. Phenology: flowering.
RM
RM
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
1402
Grace M. Kostel
2004
6
4
156
U.S.A.
South Dakota
Custer
Buffalo Gap National Grassland and Vicinity: ca 19 air mi SE of Hermosa.
-102.8765
43.695833
960
Butte tops and slopes of sand and gravel soil. Phenology: fruiting.
RM
RM
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
1832
Grace M. Kostel
2004
6
8
160
U.S.A.
Nebraska
Sioux
Oglala National Grassland and Vicinity: ca 18-18.5 air mi NW of Crawford and 0.5 mi N of Orella Road, Whitehead Creek.
-103.647833
42.871833
1006
West side drainage of creek. Phenology: flowering.
RM
RM
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
1905
Grace M. Kostel
2004
6
11
163
U.S.A.
South Dakota
Fall River
Buffalo Gap National Grassland and Vicinity: ca 8-8.5 air mi NW of Edgemont and 3 mi W of County Road 9.
-103.974667
43.3515
1112
1158
On mesa tops and slopes; sand and rock soil. Phenology: fruiting.
RM
RM
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
204
Grace M. Kostel
2004
5
12
133
U.S.A.
South Dakota
Fall River
Buffalo Gap National Grassland and Vicinity: 10 air mi NW of Edgemont.
-103.9375
43.335556
1158
North northeast-face of butte; soil is sand and silty clay; selenium may be present due to presence of Stanleya pinnata plants. Phenology: flowering.
RM
RM
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
2113
Grace M. Kostel
2004
6
14
166
U.S.A.
Nebraska
Sioux
Oglala National Grassland and Vicinity: ca 30-31 air mi NW of Crawford and 0.5 mi N of Indian Creek Road.
-103.899667
42.957333
1173
1189
On buttes of gravel and rock. Phenology: fruiting.
RM
RM
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
2200
Grace M. Kostel
2004
6
14
166
U.S.A.
Nebraska
Sioux
Oglala National Grassland and Vicinity: ca 35-35.5 air mi NW of Crawford and ca 0.5 mi S of Forest Road 931.
-103.990667
42.9525
1097
1128
Grass upland. Phenology: fruiting.
RM
RM
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
2213
Grace M. Kostel
2004
6
14
166
U.S.A.
Nebraska
Sioux
Oglala National Grassland and Vicinity: ca 27.5-28 air mi NW of Crawford.
-103.8765
42.895167
1173
1204
On ridge of rockand sand. Phenology: fruiting.
RM
RM
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
2529
Grace M. Kostel
2004
6
22
174
U.S.A.
South Dakota
Pennington
Buffalo Gap National Grassland and Vicinity: ca 3.5 air mi ESE of Wall and 0.5 mi S of U.S. Hwy 14 on Cottonwood Creek.
-102.1645
43.982167
807
In Pascopyrum smithii/Nassellus viridula plant community and grass upland on north side of creek in silty soil. Phenology: fruiting.
RM
RM
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
2632
Grace M. Kostel
2004
6
26
178
U.S.A.
South Dakota
Custer
Buffalo Gap National Grassland and Vicinity: ca 16.5-17 air mi SSE of Hermosa and 13 air mi ESE of Fairburn.
-102.953833
43.672833
929
On flat mesa top in a prairie dog town. Phenology: fruiting.
RM
RM
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
316
Grace M. Kostel B. E. Nelson
2004
5
19
140
U.S.A.
South Dakota
Custer
Buffalo Gap National Grassland and Vicinity: ca 1.5 - 2 air mi S of French Creek and 3/4 - 1 air mi E of South Fork French Creek, ca 15.5 air mi SE of Hermosa.
-103.0302
42.6337
929
987
Mesa slopes. Phenology: flowering.
RM
RM
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
3736
Grace M. Kostel
2004
7
15
197
U.S.A.
Nebraska
Sioux
Oglala National Grassland and Vicinity: ca 12.5-13 air mi NW of Crawford.
-103.6265
42.803
1371
1463
On rocky ridge and side slopes. Phenology: fruiting.
RM
RM
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
427
Grace M. Kostel B. E. Nelson
2004
5
19
140
U.S.A.
South Dakota
Custer
Buffalo Gap National Grassland and Vicinity: County Road 18, ca 2 air mi E of Fairburn.
-103.1756
43.6774
987
Along road and roadside ditch. Phenology: flowering.
RM
RM
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
436
Grace M. Kostel B. E. Nelson
2004
5
21
142
U.S.A.
South Dakota
Fall River
Buffalo Gap National Grassland and Vicinity: S of U.S. Hwy 18, ca 5 air mi WSW of Edgemont.
-103.9596
43.2895
1067
Sides of draws in Artemisia tridentata shrubland and grassland. Phenology: flowering.
RM
RM
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
4745
Grace M. Kostel
2003
10
13
286
U.S.A.
South Dakota
Custer
Buffalo Gap National Grassland and Vicinity: ca 15.5-16 air mi SSE of Hermosa along French Creek.
-103.0302
43.6377
929
Creek banks with moist clay and silt soils. Phenology: flowering.
RM
RM
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
511
Grace M. Kostel B. E. Nelson
2004
5
21
142
U.S.A.
South Dakota
Fall River
Buffalo Gap National Grassland and Vicinity: canyon N of Moss Agate Creek ca 0.5 - 1 mi S of County Road 9C, 10.5 -11 air mi NW of Edgemont.
-104.0238
43.3656
1128
1182
Draw. Phenology: flowering.
RM
RM
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
54
Grace M. Kostel
2004
4
30
121
U.S.A.
South Dakota
Custer
Buffalo Gap National Grassland and Vicinity: Red Shirt Wilderness Area: ca 1 mi N of Red Shirt, sand bluffs N of Cheyenne River.
-102.793333
43.728889
884
Grassy banks of the draws downslope of the sandbluffs. Phenology: flowering.
RM
RM
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
594
Grace M. Kostel B. E. Nelson
2004
5
25
146
U.S.A.
South Dakota
Fall River
Buffalo Gap National Grassland and Vicinity: on Forest Road 7009, 16 air mi W of Ardmore and 10 air mi SW of Edgemont.
-103.9701
43.0331
1158
1210
Draw bottom and around drainage. Phenology: flowering.
RM
RM
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
631
Grace M. Kostel B. E. Nelson
2004
5
25
146
U.S.A.
South Dakota
Fall River
Buffalo Gap National Grassland and Vicinity: ca 23 air mi SW of Edgemont.
-104.0322
43.009
1082
Up butte and across ridge, gravelly soil. Phenology: flowering & fruiting.
RM
RM
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
652
Grace M. Kostel B. E. Nelson
2004
5
25
146
U.S.A.
South Dakota
Fall River
Buffalo Gap National Grassland and Vicinity: ca 19 air mi SW of Edgemont at junction of Forest roads 7009 and 7011.
-104.0411
43.0764
1082
On shale sideslope grading into silt. Phenology: flowering.
RM
RM
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
687
Grace M. Kostel
2004
5
28
149
U.S.A.
South Dakota
Fall River
Buffalo Gap National Grassland and Vicinity: ca 9 - 9.5 air mi WSW of Edgemont and 1.5 mi W of County Road 8.
-104.006667
43.282778
1204
1219
Draw sides and slopes. Phenology: flowering.
RM
RM
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
794
Grace M. Kostel
2004
5
28
149
U.S.A.
South Dakota
Fall River
Buffalo Gap National Grassland and Vicinity: ca 8.5 air mi WNW of Edgemont and 2.5 air mi N of U.S. Hwy 18 in side drainage of Moss Agate Creek.
-104.019333
43.341667
1128
1158
Top of slope. Phenology: flowering & fruiting.
RM
RM
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
818
Grace M. Kostel
2004
5
29
150
U.S.A.
Nebraska
Sioux
Oglala National Grassland and Vicinity: ca 32 air mi NW of Crawford and 2 mi W of Edgemont Road on Forest Road 930.
-103.906
42.9868
1189
On ridge W of draw; gravel and rock soils. Phenology: fruiting.
RM
RM
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
86
Grace M. Kostel
2004
5
4
125
U.S.A.
South Dakota
Fall River
Buffalo Gap National Grassland and Vicinity: ca 5.5 mi SE of Limestone Butte and 9.5 mi E of Oelrichs.
-103.135
43.137222
640
Badland washout with white clay soil at the top of draw and a clay-silt mix at draw bottom. Phenology: flowering.
RM
RM
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
885
Grace M. Kostel
2004
5
29
150
U.S.A.
Nebraska
Sioux
Oglala National Grassland and Vicinity: ca 36 air mi NW of Crawford and 1/4 mi E of Wyoming and W of Forest Road 917.
-104.048
42.9356
1189
1219
In silt soils. Phenology: flowering.
RM
RM
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
941
Grace M. Kostel
2004
5
30
151
U.S.A.
Nebraska
Sioux
Oglala National Grassland and Vicinity: ca 21-22 air mi NNW of Crawford and 1-2 mi E of Hat Creek Road on Forest Road 925.
-103.649
42.938
1112
1128
In prairie dog town with soil ranging from sand, silt to clay. Phenology: flowering.
RM
RM
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
4968
Grace M. Kostel
2005
5
27
147
U.S.A.
South Dakota
Pennington
Buffalo Gap National Grassland and Vicinity: ca 16 air mi SSE of Wall, at roadside ditch of County Road C509.
-102.1994
43.760933
762
Soils are gravel and clay loam. Phenology: flowering.
RM
RM
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
5026
Grace M. Kostel
2005
5
27
147
U.S.A.
South Dakota
Pennington
Buffalo Gap National Grassland and Vicinity: ca 6 air mi SE of Scenic.
-102.46555
43.722133
878
On north facing slope of mesa, soils are sand and gravelly loam. Phenology: flowering.
RM
RM
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
5067
Grace M. Kostel
2005
5
27
147
U.S.A.
South Dakota
Pennington
Buffalo Gap National Grassland and Vicinity: ca 11 air mi SE of Scenic.
-102.470667
43.692
884
In badlands area, revegetated and stable, soils are clay and clay loam. Phenology: flowering.
RM
RM
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
5090
Grace M. Kostel
2005
5
28
148
U.S.A.
South Dakota
Pennington
Buffalo Gap National Grassland and Vicinity: ca 13 air mi SW of Wall and 3/4 mi E of Sage Creek Road in Bear Creek.
-102.508333
43.795167
891
Deep white-clay drainage. Phenology: flowering & fruiting.
RM
RM
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
5175
Grace M. Kostel
2005
5
30
150
U.S.A.
South Dakota
Pennington
Buffalo Gap National Grassland and Vicinity: ca 2-2.5 air mi SSW of Wall and 1/4 mi W of SD Hwy 240.
-102.241617
43.95165
868
884
In a Hesperostipa comata plant community on a rocky upland and nearby butte. Phenology: flowering.
RM
RM
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
5218
Grace M. Kostel
2005
5
30
150
U.S.A.
South Dakota
Pennington
Buffalo Gap National Grassland and Vicinity: ca 1 air mi SSE of Wall and adjacent to the Badlands National Park boundary line fence.
-102.230167
43.887167
914
929
Badlands cliffs; upland soils are of clay loam with cliff edges eroding into clay layers. Phenology: flowering.
RM
RM
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
5262
Grace M. Kostel
2005
5
30
150
U.S.A.
South Dakota
Pennington
Buffalo Gap National Grassland and Vicinity: ca 8.5-9 air mi SSE of Wall in Conata Basin.
-102.188667
43.809833
786
Badlands floodplain of deep white clay soil. Phenology: flowering.
RM
RM
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
5358
Grace M. Kostel
2005
6
1
152
U.S.A.
South Dakota
Pennington
Buffalo Gap National Grassland and Vicinity: Indian Creek Wilderness Area: ca 6 air mi due W of Scenic.
-102.669833
43.777167
860
On rock and gravel strewn clay buttes in red bed soils of iron and magnesium. Phenology: fruiting.
RM
RM
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
5395
Grace M. Kostel
2005
6
1
152
U.S.A.
South Dakota
Pennington
Buffalo Gap National Grassland and Vicinity: Indian Creek Wilderness Area: ca 6.5 air mi WSW of Scenic.
-102.6805
43.7585
819
On slopes scattered with Juniperus scopulorum in a Nasellus viridula plant community of silty clay soils. Phenology: flowering.
RM
RM
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
5426
Grace M. Kostel
2005
6
1
152
U.S.A.
South Dakota
Pennington
Buffalo Gap National Grassland and Vicinity: ca 6 air mi SSE of Scenic and due E of County Road C589.
-102.523
43.692667
864
In deep drainage of heavy white clay soil and near uplands of Hesperastipa comata grass plant community. Phenology: fruiting.
RM
RM
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
5513
Grace M. Kostel
2005
6
6
157
U.S.A.
Nebraska
Sioux
Oglala National Grassland and Vicinity: ca 12 air mi ESE of Ardmore, South Dakota and 1/2 mi due S of South Dakota.
-103.5428
42.99945
1153
In Nassellus viridula plant community on gentle rolling uplands of silt soil. Phenology: flowering.
RM
RM
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
5532
Grace M. Kostel
2005
6
6
157
U.S.A.
Nebraska
Sioux
Oglala National Grassland and Vicinity: ca 9 air mi SE of Ardmore, South Dakota and ca 1-1.5 air mi due S of South Dakota.
-103.572833
42.992833
1157
In Nassellus viridula plant community on gentle rolling uplands of silt soil. Phenology: flowering.
RM
RM
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
5544
Grace M. Kostel
2005
6
6
157
U.S.A.
Nebraska
Sioux
Oglala National Grassland and Vicinity: ca 18 air mi SE of Ardmore, South Dakota and at southeast corner of junction of Neb Hwy 71 and Forest Road 909.
-103.50555
42.956967
1178
In rolling prairie uplands of silt soil. Phenology: flowering.
RM
RM
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
5584
Grace M. Kostel
2005
6
6
157
U.S.A.
Nebraska
Dawes
Oglala National Grassland and Vicinity: ca 12-12.5 air mi SE of Ardmore, South Dakota.
-103.466967
42.950867
1203
In rock bed with silt and clay soils. Phenology: fruiting.
RM
RM
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
5751
Grace M. Kostel
2005
6
7
158
U.S.A.
South Dakota
Fall River
Buffalo Gap National Grassland and Vicinity: ca 13 air mi SSE of Edgemont and 1/2 mi E of County Road 7, just S of Crowe Dam.
-103.79045
43.114283
1145
In a Nassellus viridula plant community on gentle rolling prairie uplands of silt and clay soil. Phenology: fruiting.
RM
RM
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
5963
Grace M. Kostel
2005
6
12
163
U.S.A.
South Dakota
Jackson
Buffalo Gap National Grassland and Vicinity: ca 2 air mi SW of Cottonwood.
-101.939833
43.962167
784
On grass covered butte, soils are gravel and silty loam. Phenology: flowering & fruiting.
RM
RM
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
6138
Grace M. Kostel
2005
6
12
163
U.S.A.
South Dakota
Pennington
Buffalo Gap National Grassland and Vicinity: ca 9 air mi SE of Wall.
-102.161433
43.8766
810
In badlands ephemeral drainage on floodplain with deep, heavy, white clay soils. Phenology: flowering & fruiting.
RM
RM
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
6164
Grace M. Kostel
2005
6
12
163
U.S.A.
South Dakota
Pennington
Buffalo Gap National Grassland and Vicinity: ca 7 air mi SSE of Wall.
-102.187917
43.894767
817
In badlands ephemeral drainage on floodplain having deep, heavy, white clay soils. Phenology: flowering & fruiting.
RM
RM
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
6182
Grace M. Kostel
2005
6
12
163
U.S.A.
South Dakota
Pennington
Buffalo Gap National Grassland and Vicinity: ca 7 air mi SSE of Wall.
-102.187917
43.894767
817
In badlands ephemeral drainage on floodplain having deep, heavy, white clay soils. Phenology: fruiting.
RM
RM
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
6194
Grace M. Kostel
2005
6
12
163
U.S.A.
South Dakota
Pennington
Buffalo Gap National Grassland and Vicinity: ca 5.5 air mi SE of Wall, just W of I-90 Exit 116.
-102.156433
43.93655
821
In drainage ditch with wet clay soils. Phenology: flowering & fruiting.
RM
RM
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
6202
Grace M. Kostel
2005
6
13
164
U.S.A.
South Dakota
Pennington
Buffalo Gap National Grassland and Vicinity: ca 15.5 air mi SSE of Wall in Conata Basin.
-102.221067
43.765533
766
Prairie dog town of heavy deep white clay soils. Phenology: flowering.
RM
RM
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
6694
Grace M. Kostel
2005
6
17
168
U.S.A.
South Dakota
Pennington
Buffalo Gap National Grassland and Vicinity.
-101.559883
43.808017
731
On a badlands clay shelf sloping into a deep-cut drainage, soils are heavy white clay. Phenology: flowering & fruiting.
RM
RM
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
6731
Grace M. Kostel
2005
6
17
168
U.S.A.
South Dakota
Jackson
Buffalo Gap National Grassland and Vicinity: ca 3-3.5 air mi WSW of Kadoka.
-101.594017
43.824283
731
On a badlands outwash, soils are gravel and heavy clay. Phenology: fruiting.
RM
RM
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
6763
Grace M. Kostel
2005
6
17
168
U.S.A.
South Dakota
Jackson
Buffalo Gap National Grassland and Vicinity: ca 6.5 air mi WSW of Kadoka and 1 air mi due E of Hughes Pass.
-101.61855
43.80915
756
In a badlands outwash, soil is deep heavy white clay. Phenology: fruiting.
RM
RM
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
7104
Grace M. Kostel
2005
6
19
170
U.S.A.
South Dakota
Jackson
Buffalo Gap National Grassland and Vicinity: ca 8.5-9 air mi SW of Kadoka.
-101.675967
43.79235
723
On gently rolling prairie with silt loam soils having a deep clay pan base. Phenology: fruiting.
RM
RM
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
7490
Grace M. Kostel
2005
6
24
175
U.S.A.
South Dakota
Fall River
Buffalo Gap National Grassland and Vicinity: ca 5 air mi SE of Oelrichs and ca 3 air mi SE of Limestone Butte near Forest Road 7026.
-103.142683
43.142583
1026
On rolling prairie uplands dissected by deep drainages; soils are loam to loamy clay. Phenology: fruiting.
RM
RM
943496
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
543
Jill E. Larson
2005
6
2
153
U.S.A.
New Mexico
Rio Arriba
Carson National Forest and Vicinity: Jicarilla Ranger District: Mestenas Peak, Forest Road 312.
-107.2828
36.7591
2332
Pinus ponderosa forest with Quercus gambelii understory. Phenology: flowering & fruiting.
RM
RM
943495
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
669
Jill E. Larson
2005
6
3
154
U.S.A.
New Mexico
Rio Arriba
Carson National Forest and Vicinity: Jicarilla Ranger District: Project Gas Buggy, Forest Service point of interest on Forest Road 357.
-107.2072
36.6776
2195
Ponderosa pine forest with openings of Artemisia tridentata. Phenology: flowering & fruiting.
RM
RM
667054
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
2178
Amy J. Roderick
1997
7
12
193
U.S.A.
Wyoming
Carbon
Upper North Platte and Laramie River Drainages: Pedro Mountains: south side of range W of County Road 291, ca 12 air mi NE of Seminoe Dam.
-106.7928
42.3108
2042
2103
Grassy draw. Phenology: flowering & fruiting.
RM
RM
802767
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
52511
B. E. Nelson Luanne Lum
2001
6
10
161
U.S.A.
Wyoming
Park
Bighorn Basin: south end of Tonopah Ridge on Schaub Butte, ca 5 air mi ENE of Pitchfork; ca 10 air mi WSW of Meeteetse.
-109.0613
44.1315
2073
2158
Elymus spicatus grassland with scattered sagebrush on steep cobblestone slopes. Phenology: flowering.
RM
RM
802768
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
463
Luanne Lum Michelle Wilson
2001
7
2
183
U.S.A.
Wyoming
Washakie
Big Horn Mountains: ca 53 air mi ESE of Thermopolis.
-107.1821
43.5205
2515
Sagebrush with isolated lodgepole pine. Phenology: flowering.
RM
RM
934917
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
1359
Luanne Lum
2002
5
23
143
U.S.A.
Wyoming
Hot Springs
Bighorn Basin: along Red Hole or BLM Road 1426, ca 8.2 air mi ESE of Lucerne and ca 10.1 air mi ENE of Thermopolis.
-108.0465
43.6916
1405
1493
Sagebrush on shale. Phenology: flowering.
RM
RM
934916
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
1396
Luanne Lum
2002
5
23
143
U.S.A.
Wyoming
Hot Springs
Bighorn Basin: along Red Hole or BLM Road 1426, ca 8.9 air mi ESE of Lucerne and ca 10.2 air mi ENE of Thermopolis.
-108.0265
43.7636
1464
1493
Juniper with sagebrush in sandy soil. Phenology: flowering.
RM
RM
934915
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
1702
Luanne Lum
2002
5
29
149
U.S.A.
Wyoming
Washakie
Bighorn Basin: along County Road 65, ca 1.1 air mi ESE of Ten Sleep.
-107.4402
44.0265
1385
1410
Juniper and sagebrush with yucca adjacent to landfill. Phenology: flowering & fruiting.
RM
RM
934914
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
1969
Luanne Lum
2002
6
1
152
U.S.A.
Wyoming
Washakie
Bighorn Basin: along County Road 47 at Red Gulch, ca 8.2 air mi NW of Ten Sleep.
-107.5333
44.1174
1309
1353
Talus slope. Phenology: flowering & fruiting.
RM
RM
934913
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
2191
Luanne Lum
2002
6
4
155
U.S.A.
Wyoming
Hot Springs
Bighorn Basin: along Black Mountain Road on Lake Creek Divide, ca 22 mi ENE of Thermopolis.
-107.7856
43.6682
1560
1585
Sagebrush and yucca on shale and sandy soil. Phenology: flowering.
RM
RM
934912
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
2560
Luanne Lum
2002
6
12
163
U.S.A.
Wyoming
Washakie
Bighorn Basin: SW of Canyon Creek, ca 4.9 air mi E of Ten Sleep.
-107.38
44.0409
1554
1579
Juniper with sagebrush and yucca on mudstone and siltstone. Phenology: flowering & fruiting.
RM
RM
934911
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
2594
Luanne Lum
2002
6
14
165
U.S.A.
Wyoming
Washakie
Bighorn Basin: along Rome Hill or County Road 56 and S of Cooks Canyon, ca 8 air mi ESE of Ten Sleep.
-107.2996
43.9977
1560
1597
Sagebrush on mudstone and siltstone. Phenology: flowering & fruiting.
RM
RM
934910
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
2644
Luanne Lum
2002
6
14
165
U.S.A.
Wyoming
Washakie
Bighorn Basin: along Rome Hill or County Road 56 and S of Cooks Canyon, ca 11.3 air mi ESE of Ten Sleep.
-107.2795
43.9833
1670
1731
Sagebrush on mudstone and siltstone. Phenology: flowering & fruiting.
RM
RM
934909
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
2725
Luanne Lum
2002
6
14
165
U.S.A.
Wyoming
Washakie
Big Horn Mountains: along Rome Hill or County Road 56 S of Billy Creek, ca 16.2 air mi ESE of Ten Sleep and ca 2.3 air mi W of Monument Hill.
-107.1791
43.9689
2231
2238
Mountain meadow. Phenology: flowering.
RM
RM
934908
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
2887
Luanne Lum Al Flinck
2002
6
19
170
U.S.A.
Wyoming
Park
Bighorn Basin: along County Road 7UH and S of Goff Lake, ca 10.1 air mi NW of Cody.
-109.2094
44.6151
2012
2073
Sagebrush on sandy soil. Phenology: flowering.
RM
RM
934907
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
2944
Luanne Lum
2002
6
22
173
U.S.A.
Wyoming
Washakie
Big Horn Mountains: along County Road 85 or BLM Road 1419, ca 5.3 air mi ESE of Big Trails and ca 22.5 air mi SE of Ten Sleep.
-107.2417
43.7512
1942
2012
Sagebrush on sandy soil with cobbles. Phenology: flowering & fruiting.
RM
RM
934906
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
3005
Luanne Lum
2002
6
22
173
U.S.A.
Wyoming
Washakie
Big Horn Mountains: along County Road 85 or BLM Road 1419 and along Hazelton Road, ca 9.7 air mi ESE of Big Trails and ca 26.5 air mi SE of Ten Sleep.
-107.1423
43.7368
2231
2280
Sagebrush. Phenology: flowering.
RM
RM
934905
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
3042
Luanne Lum
2002
6
22
173
U.S.A.
Wyoming
Johnson
Big Horn Mountains: along Hazelton Road, ca 11 air mi E of Big Trails and ca 25 air mi SE of Ten Sleep.
-107.1025
43.78
2439
2454
Sagebrush. Phenology: flowering.
RM
RM
934904
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
3106
Luanne Lum
2002
6
24
175
U.S.A.
Wyoming
Washakie
Big Horn Mountains: along Wyo Hwy 435, ca 10 air mi ENE of Ten Sleep.
-107.2795
44.0984
1817
1865
Juniper, pine, and sagebrush on sandy soil with cobbles. Phenology: flowering & fruiting.
RM
RM
934903
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
3169
Luanne Lum
2002
6
24
175
U.S.A.
Wyoming
Washakie
Big Horn Mountains: along Wyo Hwy 435, ca 6.7 air mi ENE of Ten Sleep.
-107.2594
44.1128
1865
2036
Juniper, pine, and sagebrush on sandy soil with cobbles. Phenology: fruiting.
RM
RM
934902
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
3387
Luanne Lum
2002
6
30
181
U.S.A.
Wyoming
Big Horn
Big Horn Mountains: along Cold Springs Road S of Medicine Lodge Canyon, ca 6.5 air mi NE of Hyattville and ca 30.5 air mi NE of Worland.
-107.5121
44.3207
1853
1884
Juniper and sagebrush. Phenology: flowering & fruiting.
RM
RM
934901
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
3423
Luanne Lum
2002
6
30
181
U.S.A.
Wyoming
Big Horn
Big Horn Mountains: along Cold Springs Road S of Medicine Lodge Canyon, ca 10 air mi NE of Hyattville and ca 34 air mi NE of Worland.
-107.4351
44.3208
2411
2432
Juniper and sagebrush. Phenology: flowering & fruiting.
RM
RM
934900
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
3519
Luanne Lum
2002
7
2
183
U.S.A.
Wyoming
Washakie
Big Horn Mountains: along Forest Road 25 W of Canyon Creek, ca 6.5 air mi ESE of Meadowlark Lake.
-107.1389
44.1272
2644
2667
Pine and mountain meadows. Phenology: flowering & fruiting.
RM
RM
934899
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
4039
Luanne Lum Michelle Wilson
2002
7
10
191
U.S.A.
Wyoming
Park
Absaroka Mountains: along Monumnet Hill or County Road 7UH on Rattlesnake Mountain, ca 12.5 air mi NNW of Cody.
-109.2702
44.6151
2237
2295
Sagebrush and pine. Phenology: flowering & fruiting.
RM
RM
934898
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
5249
Luanne Lum
2002
8
2
214
U.S.A.
Wyoming
Big Horn
Big Horn Mountains: along Forest Road 17 N of Round Lake, ca 31.5 air mi ESE of Greybull.
-107.4351
44.4243
2643
2673
Coniferous forest and sagebrush. Phenology: flowering & fruiting.
RM
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
956
Margarette J. Lyon
1993
5
15
135
U.S.A.
Colorado
San Miguel
San Miguel and lower Dolores River Drainages: Dry Creek Basin: State Wildlife Area.
-108.5992
38.0459
1965
Sandy soil with Artemisia tridentata, A. nova and A. frigida. Phenology: flowering.
RM
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
3169
Margarette J. Lyon
1994
5
16
136
U.S.A.
Colorado
Mesa
San Miguel and Lower Dolores River Drainages: Wildcat Trail #640, S from Colo Hwy 141; ca 1 air mi W of Unaweep Divide.
-108.669
38.7769
2195
With oak, pinyon, juniper, sage, and mountain mahogany. Phenology: flowering.
RM
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
3715
Margarette J. Lyon
1994
5
31
151
U.S.A.
Colorado
Montrose
San Miguel and Lower Dolores River Drainages: Uncompahgre Plateau: at intersection of Delta-Nucla Road (25 Mesa Road) and Glencoe Road; ca 10 air mi NE of Nucla.
-108.4173
38.3579
2353
In ponderosa pine and oak. Phenology: flowering.
RM
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
3861
Margarette J. Lyon
1994
6
3
154
U.S.A.
Colorado
Mesa
San Miguel and Lower Dolores River Drainages: Pine Mountain at intersection of County Road 6.3 and County Road 10.8.
-108.8563
38.7039
2402
Mesa top with ponderosa pine and oak. Phenology: flowering.
RM
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
3989
Margarette J. Lyon
1994
6
6
157
U.S.A.
Utah
Grand
San Miguel and Lower Dolores River Drainages: Manti-La Sal National Forest: at head of Fisher Creek.
-109.1871
38.6156
2439
With pinyon, juniper, and oak. Phenology: flowering & fruiting.
RM
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
4032
Margarette J. Lyon
1994
6
6
157
U.S.A.
Utah
Grand
San Miguel and Lower Dolores River Drainages: Manti-La Sal National Forest: North Beaver Mesa.
-109.1688
38.63
2439
Mesa with pinyon, oak, and ponderosa pine. Phenology: flowering & fruiting.
RM
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
5234
Margarette J. Lyon
1994
6
26
177
U.S.A.
Colorado
Mesa
San Miguel and Lower Dolores River Drainages: Grand Mesa National Forest: at forest boundary.
-108.7814
38.8352
2804
Spruce, fir, and aspen with mesic forb understory. Phenology: flowering & fruiting.
RM
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
12265
Stuart Markow
2002
5
22
142
U.S.A.
Oregon
Wheeler
Blue Mountains: Umatilla National Forest: Stalling Butte, 1.5 air mi SW of Bull Prairie Lake, ca 7 air mi NE of Spray.
1402
Open Juniper woodland with Juniperus occidentalis, Elymus spicatus, Eriogonum strictum, Achillea millefolium, Lupinus caudatus. Phenology: flowering.
RM
RM
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
21
Kim Frymire
2004
6
4
156
U.S.A.
OR
Umatilla
Meadow on southeast side of Forest Service Road 290, 24 air miles east of Ukiah.
1402
Camas meadow with Allium tolmiei var. platyphyllum, Juniperus occidentalis, Orthocarpus tenuifolius. Phenology: flowering.
RM
USFS
846995
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
64694
B. E. Nelson Rob Massatti and Rachel Newton
2005
6
6
157
U.S.A.
Wyoming
Fremont
East Slope Wind River Range and Vicinity: lower switchbacks of Sinks Canyon Road above Middle Fork Popo Agie River, ca 1 air mi N of Fossil Hill, ca 9.5 air mi SW of Lander.
-108.8481
42.7256
2280
2353
Sagebrush grassy slopes. Phenology: flowering.
RM
USFS
846994
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
64767
B. E. Nelson Rob Massatti and Rachel Newton
2005
6
7
158
U.S.A.
Wyoming
Fremont
East Slope Wind River Range and Vicinity: south slope of Ed Young Mountain from Forest Road 352, ca 14.5-15.5 air mi S of Lander; ca 9.5-10.5 air mi N of Atlantic City.
-108.7527
42.6215
2286
2329
Burned sagebrush-grassland and large draw. Phenology: flowering.
RM
USFS
846996
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
1122
Rob Massatti
2005
6
25
176
U.S.A.
Wyoming
Fremont
East Slope Wind River Range and Vicinity: base of Indian Ridge, ca 9 air mi SW of Lander.
-108.8407
42.7056
2408
2524
Sagebrush grassland/grassland mosaic on rocky limestone substrate. Phenology: flowering.
RM
USFS
847003
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
116
Rob Massatti
2005
6
10
161
U.S.A.
Wyoming
Fremont
East Slope Wind River Range and Vicinity: Deep Creek drainage and vicinity, ca 16 air mi SSE of Lander.
-108.666
42.6062
2161
2231
Aspen grove along stream. Phenology: flowering.
RM
USFS
847002
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
179
Rob Massatti
2005
6
10
161
U.S.A.
Wyoming
Fremont
East Slope Wind River Range and Vicinity: Red Canyon ca 1 mi W of Weiser Knoll, ca 14 air mi SE of Lander.
-108.6419
42.6528
1789
1899
Juniper/sagebrush draws and slopes. Phenology: flowering & fruiting.
RM
USFS
847001
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
301
Rob Massatti
2005
6
13
164
U.S.A.
Wyoming
Fremont
East Slope Wind River Range and Vicinity: southeast side of Fairfield Hill, ca 6 air mi SW of Lander.
-108.8389
42.7405
2256
2475
Juniper woodland/sagebrush grassland on steep slopes beneath limestone cliffbands. Phenology: flowering.
RM
USFS
847000
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
412
Rob Massatti
2005
6
15
166
U.S.A.
Wyoming
Fremont
East Slope Wind River Range and Vicinity: 1.5 mi S of Weiser Knoll, ca 16 mi SSE of Lander.
-108.6185
42.6277
1960
1987
Juniper/pine woodland amongst cliffs interspersed with sagebrush grasslands. Phenology: flowering & fruiting.
RM
USFS
846999
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
447
Rob Massatti
2005
6
15
166
U.S.A.
Wyoming
Fremont
East Slope Wind River Range and Vicinity: 1 mi NW of Pine Spring, ca 15 mi S of Lander.
-108.7004
42.6113
2439
2490
Sagebrush/bitterbrush grassland on a steep south-facing slope. Phenology: flowering.
RM
USFS
846998
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
755
Rob Massatti
2005
6
21
172
U.S.A.
Wyoming
Fremont
East Slope Wind River Range and Vicinity: Fairfield Hill and Timber Top, ca 6 air mi SW of Lander.
-108.8376
42.7548
2317
2509
Sagebrush grassland. Phenology: flowering & fruiting.
RM
USFS
846997
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
947
Rob Massatti
2005
6
23
174
U.S.A.
Wyoming
Fremont
East Slope Wind River Range and Vicinity: Suicide Point and vicinity, ca 11 air mi WSW of Lander.
-108.9259
42.8076
2673
Graminoid/forb meadow on a rocky limestone substrate. Phenology: flowering.
RM
USFS
846993
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
4447
Rob Massatti
2006
5
9
129
U.S.A.
Wyoming
Fremont
East Slope Wind River Range and Vicinity: ca 4 air mi W of Lander.
-108.8189
42.8271
1768
1878
Sagebrush grassland. Phenology: flowering.
RM
USFS
846992
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
4482
Rob Massatti
2006
5
23
143
U.S.A.
Wyoming
Fremont
East Slope Wind River Range and Vicinity: south ridge of Sheep Canyon, ca 4.5 air mi SW of Lander.
-108.799
42.758
1850
2393
Rocky mixed shrubland and grassland on limestone. Phenology: flowering & fruiting.
RM
USFS
846991
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
4695
Rob Massatti
2006
5
25
145
U.S.A.
Wyoming
Fremont
East Slope Wind River Range and Vicinity: ca 3 mi SW of Weiser Knoll; ca 15 air mi SSE of Lander.
-108.6259
42.6015
2067
2173
Rocky meadow on limestone. Phenology: flowering & fruiting.
RM
USFS
846990
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
4761
Rob Massatti
2006
5
26
146
U.S.A.
Wyoming
Fremont
East Slope Wind River Range and Vicinity: Miners Delight and vicinity, ca 21 air mi S of Lander.
-108.6688
42.5332
2515
2545
Rocky meadow on granite-derived substrate. Phenology: flowering.
RM
USFS
846989
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
4842
Rob Massatti
2006
5
26
146
U.S.A.
Wyoming
Fremont
East Slope Wind River Range and Vicinity: junction of Oregon Trail and Sweetwater River, ca 10 air mi WSW of South Pass City.
-108.9871
42.443
2347
2432
Rocky meadow and riparian streamsides. Phenology: flowering.
RM
USFS
846988
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
5091
Rob Massatti
2006
6
4
155
U.S.A.
Wyoming
Fremont
East Slope Wind River Range and Vicinity: 1 mi NW of Weiser Knoll, ca 12 air mi SSE of Lander.
-108.6416
42.7034
1725
1914
Sagebrush steppe. Phenology: fruiting.
RM
USFS
846987
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
5389
Rob Massatti
2006
6
8
159
U.S.A.
Wyoming
Fremont
East Slope Wind River Range and Vicinity: ca 1 mi SE of Wolf Point; ca 13 air mi S of Lander.
-108.7247
42.6415
2262
2368
Sagebrush steppe. Phenology: flowering & fruiting.
RM
USFS
846986
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
5434
Rob Massatti
2006
6
8
159
U.S.A.
Wyoming
Fremont
East Slope Wind River Range and Vicinity: 1 mi W of Ed Young Mountain; ca 14 air mi S of Lander.
-108.7688
42.6312
2210
2446
Burned lodgepole pine forest. Phenology: flowering & fruiting.
RM
RM
667053
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
2466
Amy J. Roderick
1997
7
16
197
U.S.A.
Wyoming
Carbon
Upper North Platte and Laramie River Drainages: Ferris Mountains: north side access from Cherry Creek or BLM Road 3147, ca 8.7 air mi W of Three Forks Junction; ca 34 air mi N of Rawlins.
-107.3185
42.2963
2439
Base of limestone fin and its crevices; rising out of open pine-fir forest. Phenology: fruiting.
RM
RM
655130
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
51278
Ronald L. Hartman
1995
6
26
177
U.S.A.
Wyoming
Teton
Mount Leidy Highland Area: Gros Ventre River Road, ca 2 air mi E of Forest boundary; just W to overlooking Lower Slide Lake, on the north side.
-110.5565
43.6484
2256
2378
Steep slopes with outcrops of sandstone and limestone. Phenology: flowering & fruiting.
RM
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
4405
Lynn Marie Moore
1995
5
25
145
U.S.A.
Colorado
San Miguel
Upper Dolores River Drainage and Adjacent Areas: East Island Mesa Spring, County Road Z1, ca 24 air mi SW of Nucla.
-108.8976
38.2994
2134
Pinyon-juniper, Ephedra, Purshia, and Salix surrounding seepage and spring with cryptogrammic soil and rimrock pavement. Southeast-facing slope. Phenology: flowering.
RM
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
5344
Lynn Marie Moore Fallon Judkins and Carlann Defontes
1995
6
8
159
U.S.A.
Colorado
Montezuma
[location and coordinates withheld]
2024
Pinyon-juniper, oak, and Amelanchier on south facing point. Phenology: fruiting.
RM
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
5794
Lynn Marie Moore Fallon Judkins
1995
6
20
171
U.S.A.
Colorado
Dolores
Upper Dolores River Drainage and Adjacent Areas: County Road 10.00, ca 5.5 air mi NE of Dove Creek; Dolores River Overlook; Mountain Sheep Point.
-108.8009
37.7994
2408
Artemesia, oak, and ponderosa on south to southwest facing slopes. Phenology: fruiting.
RM
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
6077
Lynn Marie Moore
1995
6
28
179
U.S.A.
Colorado
Montezuma
Upper Dolores River Drainage and Adjacent Areas: State Wildlife Area: ca 5.5 air mi NW of Mancos at Summit Reservoir, S of Colo. Hwy 184.
-108.4042
37.4206
2225
Ponderosa, Juniperus scopulorum, Quercus, Amelanchier, and Rosa on a southwest facing slope. Phenology: fruiting.
RM
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
6167
Lynn Marie Moore
1995
6
28
179
U.S.A.
Colorado
Montezuma
Upper Dolores River Drainage and Adjacent Area: San Juan National Forest: ca 14 air mi N of Cortez near Sage Hen Fishing Access at McPhee Reservoir, Forest Road 500.
-108.5857
37.5669
2243
2256
Pinyon-juniper, oak, Artemesia, Cercocarpus, Amelanchier, and Fendlera on east facing slopes. Phenology: fruiting.
RM
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
6546
Lynn Marie Moore
1995
7
9
190
U.S.A.
Colorado
Dolores
Upper Dolores River Drainage and Adjacent Areas: San Juan National Forest: Forest Road 240, ca 23 air mi N of Dolores at Ryman Creek S of Disappointment Valley.
-108.5259
37.8139
2164
Pinyon-juniper, sagebrush, Atriplex, squawapple, Quercus, and serviceberry, on soil with selenium odor, west-facing draw along a dry wash. Phenology: fruiting.
RM
RM
667066
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
255
Amy J. Roderick
1997
6
1
152
U.S.A.
Wyoming
Natrona
Upper North Platte and Laramie River Drainages: Devils Gate State Historic Site: roadside pullout on Wyo Hwy 220, ca 14 air mi NE from Muddy Gap Junction.
-107.2192
42.4383
1835
Flat sagebrush grasslands with scattered forbs; somewhat disturbed. Phenology: flowering.
RM
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
50571
Ronald L. Hartman
1995
5
25
145
U.S.A.
Colorado
Montezuma
Upper Dolores River Drainage and Adjacent Areas: entrance to McPhee Recreation Area on County Road 25.
-108.5857
37.4937
2134
Pinyon-juniper and grassy areas. Phenology: flowering.
RM
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
50616
Ronald L. Hartman
1995
5
25
145
U.S.A.
Colorado
Dolores
[location and coordinates withheld]
2042
Pinyon-juniper woodland. Phenology: flowering.
RM
RM
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
122
Rachel Newton
2005
6
13
164
U.S.A.
Wyoming
Fremont
Wetlands and Adjacent Areas: Lewiston Lakes, ca 30.5 air mi SE of Lander.
-108.4541
42.4515
2210
Moderately grazed rocky uplands. Phenology: flowering.
RM
RM
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
134
Rachel Newton
2005
6
13
164
U.S.A.
Wyoming
Fremont
Wetlands and Adjacent Areas: Sweetwater River Canyon, ca 34 air mi SE of Lander.
-108.445
42.4329
2106
Along river banks. Phenology: flowering.
RM
RM
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
203
Rachel Newton
2005
6
15
166
U.S.A.
Wyoming
Sublette
Wetlands and Adjacent Areas: Big Sandy River, ca 18 air mi NNW of Farson.
-109.5173
42.3521
2063
Sandy river banks and flood plains. Phenology: flowering.
RM
RM
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
23
Rachel Newton
2005
6
10
161
U.S.A.
Wyoming
Fremont
Wetlands and Adjacent Areas: along the Sweetwater River, ca 5 air mi NE of Sweetwater Station; ca 38 air mi SE of Lander.
-108.0765
42.5801
1992
Along river banks, flood plains and ditches. Phenology: flowering.
RM
RM
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
376
Rachel Newton
2005
6
17
168
U.S.A.
Wyoming
Fremont
Wetlands and Adjacent Areas: confluence of Sweetwater River and Sharps Meadows Creek, ca 32 air mi SW of Lander.
-108.9049
42.3851
2278
Moist banks and flood plains. Phenology: flowering.
RM
RM
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
473
Rachel Newton
2005
6
18
169
U.S.A.
Wyoming
Fremont
Wetlands and Adjacent Areas: Strawberry Creek, ca 26 air mi SE of Lander.
-108.5827
42.4545
2250
2292
Rocky slopes. Phenology: flowering.
RM
RM
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
618
Rachel Newton
2005
6
18
169
U.S.A.
Wyoming
Fremont
Wetlands and Adjacent Areas: Sweetwater River, ca 31 air mi SE of Lander.
-108.5377
42.4583
2267
River banks and flood plains. Phenology: flowering.
RM
RM
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
3938
Rachel Newton
2006
6
1
152
U.S.A.
Wyoming
Johnson
Wetlands and Adjacent Areas: Muddy Guard Reservoir #2, ca 9 air mi SSW of Buffalo.
-106.75462
44.18208
1609
Rocky sandy hillside with scattered Artemisia and Yucca. Phenology: flowering.
RM
RM
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
4015
Rachel Newton
2006
6
3
154
U.S.A.
Wyoming
Johnson
Wetlands and Adjacent Areas: Meadow Creek, ca 0.5 mi S of Linch; ca 24 air mi ESE of Kaycee.
-106.19917
43.60326
1501
Heavily grazed hillside with scattered Artemisia. Phenology: flowering & fruiting.
RM
RM
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
4474
Rachel Newton
2006
6
7
158
U.S.A.
Wyoming
Weston
[location and coordinates withheld]
1401
Dry rocky hillside. Phenology: flowering & fruiting.
RM
RM
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
4768
Rachel Newton
2006
6
12
163
U.S.A.
Wyoming
Crook
Wetlands and Adjacent Areas: Keyhole Reservoir, ca 11 air mi NE of Moorcroft.
-104.79604
44.37094
1220
Dry sandy uplands with occasional rock outcroppings. Phenology: fruiting.
RM
RM
768097
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
1903
Sarah Nunn
2001
6
22
173
U.S.A.
Colorado
Larimer
Roosevelt National Forest: Front Range: summit of Mount Margaret N of County Road 74E, ca 26 air mi NW of Fort Collins.
-105.5227
40.8139
2439
Thermopsis and Oxytropis meadows in the foothills. Phenology: flowering.
RM
RM
768095
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
317
Sarah Nunn Ronald L. Hartman
2001
5
26
146
U.S.A.
Colorado
Larimer
Roosevelt National Forest: Front Range: The Narrows on U.S. Hwy 34, just W of the bridge over the Big Thompson River, S of Alexander Mountain, ca 6 air mi W of Loveland.
-105.2402
40.4307
1646
1951
Steep sided ravine with rocky south and east facing slopes, shrub cover of Ribes and Rubus with Bromus and Thermopsis. Phenology: flowering.
RM
RM
768096
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
355
Sarah Nunn Ronald L. Hartman
2001
5
26
146
U.S.A.
Colorado
Larimer
Roosevelt National Forest: Front Range: Alexander Mountain off U.S. Hwy 34 north side of The Narrows, ca 6 air mi W of Loveland.
-105.2402
40.4307
1951
2134
Steep east facing slope and summit of broad topped mountain with scattered ponderosa pine, Rocky Mountain juniper, and Prunus. Phenology: flowering.
RM
RM
194899
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
3068
C. L. Porter
1942
6
2
153
U.S.A.
Wyoming
Albany
Plains E of Laramie.
-105.5138
41.3123
2195
2286
Sandy plains. Flowers cream-colored. Phenology: flowering.
RM
RM
207466
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
4164
C. L. Porter
1947
5
25
145
U.S.A.
Wyoming
Carbon
Seminoe Mountains: near the dam.
-106.9086
42.1559
2103
2195
Phenology: flowering & fruiting.
RM
RM
211005
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
4494
C. L. Porter
1948
6
3
155
U.S.A.
Wyoming
Carbon
14 mi N of Rawlins.
-107.3499
41.9622
2073
On sandy soil. Phenology: flowering & fruiting.
RM
RM
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
1517
Robin Jones B. E. Nelson
1991
6
10
161
U.S.A.
Wyoming
Fremont
Owl Creek/Bridger Mountains: Bridger Mountains: along Birdseye Creek and adjacent slopes and ridges, ca 12 air mi N of Shoshoni; ca 29 air mi NNE of Riverton.
-108.1031
43.39333
1615
1768
Limestone like rock, ridges, and slopes.
RM
RM
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
1555
Robin Jones B. E. Nelson
1991
6
11
162
U.S.A.
Wyoming
Hot Springs
Owl Creek/Bridger Mountains: Padlock Rim, ca 4 air mi SE of Hamilton Dome.
-108.1469
43.75389
1676
1817
Sandstone slopes and hills with sandy soil.
RM
RM
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
1580
Robin Jones B. E. Nelson
1991
6
12
163
U.S.A.
Wyoming
Hot Springs
Owl Creek/Bridger Mountains: ridge between North Fork and Middle Fork Owl Creek, ca 19 air mi WSW of Hamilton Dome; ca 37 air mi WNW of Thermopolis.
-108.8836
43.69417
2042
2073
Volcanic and other cobble and boulders, hills, and draws.
RM
RM
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
1712
Robin Jones Hollis Marriott
1991
6
22
173
U.S.A.
Wyoming
Hot Springs
Owl Creek/Bridger Mountains: Owl Creek Mountains: Wind River Indian Reservation: ca 3 air mi S of Anchor Reservoir; ca 33 air mi WSW of Thermopolis.
2439
2865
Open, west-facing slope with scattered trees.
RM
RM
11070
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
3161
Aven Nelson
1897
6
16
167
U.S.A.
Wyoming
Albany
Laramie Hills.
-105.4696
41.2679
2225
2530
Phenology: flowering & fruiting.
RM
RM
157586
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
5623
Aven Nelson Elias Nelson
1899
7
1
182
U.S.A.
Wyoming
Park
Yellowstone National Park: Mammoth Hot Springs.
-110.7153
44.9649
1920
2073
On low flats among the formations. Phenology: flowering & fruiting.
RM
RM
20495
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
5623
Aven Nelson Elias Nelson
1899
7
1
182
U.S.A.
Wyoming
Park
Yellowstone National Park: Mammoth Hot Springs.
-110.7153
44.9649
1920
2073
On low flats among the formations. Phenology: flowering & fruiting.
RM
RM
157585
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
6975
Aven Nelson
1900
5
31
151
U.S.A.
Wyoming
Albany
Sand Creek.
-105.7553
41.0099
2317
On the sandy, grassy slopes. Phenology: flowering & fruiting.
RM
RM
65507
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
9129
Aven Nelson
1906
6
152
U.S.A.
Wyoming
Albany
Laramie Hills.
-105.4696
41.2679
2225
2530
Phenology: flowering.
RM
RM
126396
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
9260
Aven Nelson
1909
7
5
186
U.S.A.
Wyoming
Albany
Eagle Peak.
-105.355
41.2823
2500
Wet valleys. Phenology: flowering & fruiting.
RM
RM
1414
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
s.n.
Aven Nelson
1893
6
152
U.S.A.
Wyoming
Albany
Laramie Hills.
-105.4696
41.2679
2225
2530
Phenology: flowering & fruiting.
RM
RM
397244
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
2768
Betsy E. Neely
1985
6
5
156
U.S.A.
Wyoming
Laramie
Ca 7.5 mi NE of junction of U.S. Hwy 85 and I-25, north side of U.S. Hwy 85.
-104.6994
41.3197
1800
Silty calcareous soil with Agropyron, Poa, and Stipa. Phenology: flowering.
RM
RM
297707
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
17
Robert Luce
1975
5
13
133
U.S.A.
Wyoming
Goshen
Table Mountain Wildlife Unit.
-104.14
41.8563
1219
1250
Phenology: flowering & fruiting.
RM
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
2551
Bonnie Heidel Ted Benson
2004
5
28
149
U.S.A.
Wyoming
Goshen
Southeastern Plains: Fort Laramie National Historic Site: south side of Laramie River, ca 2.5 air mi SW of Fort Laramie (town).
-104.5541
42.2003
1295
Swale in rolling riverbottoms, on fine, loose sand, with Calamovilfa longifolia, Stipa comata. Phenology: flowering & fruiting.
RM
USFS
402642
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
88
C. J. Bayer
1911
5
25
145
U.S.A.
Wyoming
Fremont
Washakie National Forest.
Phenology: flowering.
RM
RM
393316
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
57-206
C. S. Gilbert
1957
7
2
183
U.S.A.
Wyoming
Albany
Happy Jack Road near Laramie.
-105.4314
41.2536
2500
2560
Phenology: flowering.
RM
RM
393308
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
58-289
C. S. Gilbert
1958
5
21
141
U.S.A.
Wyoming
Albany
Bamforth Basin.
-105.7383
41.3881
2134
Phenology: buds.
RM
RM
393309
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
S-61-529
C. S. Gilbert H. F. Eppson
1961
6
14
165
U.S.A.
Wyoming
Teton
N of Grand Teton National Park Headquarters.
-110.7358
43.6916
2012
Phenology: flowering & fruiting.
RM
USFS
402639
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
506
Charles H. McDonald O. A. Harrison
1926
5
6
126
U.S.A.
Wyoming
Lincoln
Wyoming National Forest: hill between Grover Park and Dunston Canon.
-110.9049
42.8135
2286
Scattered abundance on 40% southeast slope with rocky clay soil; associated with sage, wheatgrass, Poa, balsam-root, Comandra. Phenology: buds.
RM
RM
204602
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
96
Charles L. Turner
1946
6
6
157
U.S.A.
Wyoming
Campbell
Hills 6 mi E of Weston.
-105.2178
44.6292
1189
1219
Dry sandy hills. Phenology: fruiting.
RM
RM
105304
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
3
Crystal Finley
1926
4
23
113
U.S.A.
Wyoming
Big Horn
Trapper Canyon.
-107.5726
44.5089
1585
1798
Rocky dry hillsides above canyon. Phenology: fruiting.
RM
RM
301101
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
342
Don G. Despain
1969
6
5
156
U.S.A.
Wyoming
Johnson
Big Horn Mountains: head of Billy Creek.
-106.8978
44.1272
2469
Under Pinus flexilis forest. Phenology: flowering.
RM
RM
397825
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
s.n.
D. Long J. Von Loh
1983
6
152
U.S.A.
Wyoming
Laramie
F. E. Warren Air Force Base: near Crow Creek, picnic area.
-104.874
41.157
1859
Grassland. Phenology: flowering & fruiting.
RM
RM
397826
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
s.n.
D. Long J. Von Loh
1983
6
152
U.S.A.
Wyoming
Laramie
F. E. Warren Air Force Base: along Crow Creek near picnic area.
-104.8775
41.1531
1859
Meadow. Phenology: flowering & fruiting.
RM
RM
398747
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
22
Dan Lewis
1981
6
7
158
U.S.A.
Wyoming
Converse
Laramie Mountains: LaPrele and Woodchopper creeks, ca 30 air mi SW of Douglas.
-105.8216
42.4819
2286
Common in moist meadow. Phenology: flowering.
RM
RM
301570
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
12B
Darold W. Sabinske
1970
7
3
184
U.S.A.
Wyoming
Teton
Grand Teton National Park: near Moose.
-110.5964
43.7924
Big and low sagebrush area. Phenology: flowering & fruiting.
RM
USFS
402634
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
355
Dayton P. Kirkham
1935
6
16
167
U.S.A.
Wyoming
Johnson
Big Horn National Forest: Hunter Ranger Station pasture.
-106.952
44.3208
2225
Fair abundance on dry sites with 30% southeast slope, gravelly clay soil; associated in parks with wheatgrass, ragwort and Avena. Phenology: flowering.
RM
RM
681732
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
33
Denise Culver
1989
6
9
160
U.S.A.
Wyoming
Teton
Bridger Teton National Forest: ca 3 air mi W of Hoback Junction; ca 2.2 mi N on Fall Creek/Wilson Road.
-110.8023
43.3281
2012
Sagebrush grassland. Phenology: flowering & fruiting.
RM
USFS
402636
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
C-114
E. A. Snow
1928
5
18
139
U.S.A.
Wyoming
Albany
Medicine Bow National Forest: Centennial Ranger Station pasture.
-106.1573
41.2967
2439
Scattered abundance on dry slope of 5 degrees, east exposure with gravelly loam soil; associated with sagebrush. Phenology: buds.
RM
RM
101658
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
8725
Elam Bartholomew
1924
6
27
179
U.S.A.
Wyoming
Hot Springs
Thermopolis.
-108.2258
43.6484
1432
1493
High gravelly hillsides. Phenology: fruiting.
RM
RM
157120
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
525
E. H. Cronin
1952
6
14
166
U.S.A.
Wyoming
Big Horn
Big Horn Mountains: Bighorn National Forest: Bald Ridge, 6 mi W of Shell Ranger Station.
-107.6101
44.5717
2500
2591
Phenology: flowering.
RM
RM
104404
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
117
Edward D. Pearson D. Pearson
1924
7
20
202
U.S.A.
Wyoming
Park
Shoshone National Forest: Crandall Creek, near Simpson's Cabin.
-109.6143
44.8323
2134
Moist soil. Phenology: flowering.
RM
RM
32039
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
594
Elmer D. Merrill E. N. Wilcox
1901
6
22
173
U.S.A.
Wyoming
Teton
Pacific Creek.
-110.508
43.8513
2073
Bottomlands. Phenology: flowering & fruiting.
RM
RM
32038
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
595
Elmer D. Merrill E. N. Wilcox
1901
6
22
173
U.S.A.
Wyoming
Teton
Pacific Creek.
-110.508
43.8513
2073
Dry soil. Phenology: flowering & fruiting.
RM
USFS
402635
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
1-25
Ernest E. McKee
1925
6
20
171
U.S.A.
Wyoming
Sublette
Wyoming National Forest: Surveyor Creek near Quadrat.
-109.7529
42.9893
2530
Medium abundance on slope of 6 to 8, soil sandy loam; associated with grass (20%), weed (60%), and sage (20%). Phenology: flowering.
RM
RM
577872
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
16635
Erwin F. Evert
1989
6
9
160
U.S.A.
Wyoming
Park
North Fork Shoshone River Drainage: Absaroka Mountains: base of east side of Sheep Mountain, ca 9 mi SW of Cody.
-109.2446
44.4645
1768
Seasonally wet-moist depression dominated by Iris missouriensis, Carex praegracilis and Poa ampla. Phenology: flowering.
RM
RM
577743
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
16781
Erwin F. Evert
1989
6
15
166
U.S.A.
Wyoming
Park
North Fork Shoshone River Drainage: Absaroka Mountains: southwest flank of Rattlesnake Mountain, ca 6-7 mi W of Cody and ca 1 mi N of U.S. Hwy 14, 16, and 20.
-109.2042
44.5079
1951
2134
Rocky, north-south trending ridge, open Douglas fir forest with limestone substrates. Phenology: flowering.
RM
RM
578071
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
17120
Erwin F. Evert
1989
6
25
176
U.S.A.
Wyoming
Park
Absaroka Mountains: North Fork Shoshone River Drainage: southwest end of Rattlesnake Mountain, ca 6 mi W of Cody.
-109.1922
44.5295
2560
2621
Open Douglas fir-limber pine forest/meadow parkland on limestone substrates. Phenology: flowering.
RM
RM
341407
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
2688
Erwin F. Evert
1981
6
14
165
U.S.A.
Wyoming
Park
Absaroka Mountains: Shoshone National Forest, along U. S. Hwy 14, 16, and 20, just N of Eagle Creek Campground.
-109.8651
44.4763
1972
Growing with Arnica sororia, Artemisia tridentata, and Festuca ovina. Phenology: flowering.
RM
RM
1391
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
s.n.
F. F. Moir
1893
6
152
U.S.A.
Wyoming
Albany
Laramie Hills.
-105.4696
41.2679
2225
2530
Phenology: flowering.
RM
RM
115628
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
s.n.
Frank L. Moore C. E. Moore
1896
5
30
151
U.S.A.
Wyoming
Big Horn Mountains.
1524
Phenology: flowering & fruiting.
RM
RM
317303
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
219
Francis B. Current
1978
5
30
150
U.S.A.
Wyoming
Carbon
Shirley Basin, 35 air mi SSE of Casper.
-106.072
42.3691
2167
With Artemisia tridentata. Phenology: flowering.
RM
RM
317304
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
232
Francis B. Current
1978
5
31
151
U.S.A.
Wyoming
Carbon
Shirley Basin: 35 air mi SSE of Casper.
-106.072
42.3691
2167
With Artemisia tridentata. Phenology: flowering.
RM
RM
317305
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
279
Francis B. Current
1978
6
12
163
U.S.A.
Wyoming
Carbon
Pathfinder Mine, 34 air mi SSE of Casper.
-106.2083
42.3835
2167
With Artemisia tridentata. Phenology: flowering.
RM
RM
335602
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
826
Francis B. Current
1980
6
18
170
U.S.A.
Wyoming
Carbon
Battle Mountain: base of Deer Ridge, E of Wyo Hwy 70, ca 6.5 air mi E of Savery.
-107.3164
41.0405
2195
Amelanchier overstory. Phenology: flowering & fruiting.
RM
RM
268794
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
92
Francis X. Jozwik
1962
6
6
157
U.S.A.
Wyoming
Natrona
Casper Mountain area: S side of the mountain just N of Circle Drive road, 5 mi from where it crosses the summit.
-106.2933
42.7295
2256
Rocky slopes. Phenology: flowering.
RM
USFS
636316
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
s.n.
G. A. Goodwin
1974
5
28
148
U.S.A.
Wyoming
Carbon
I-80; Weather Station Snow Fence 279.5, 200 yds W of I-80.
-106.0689
41.5302
2356
Grassland. Phenology: flowering.
RM
RM
87463
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
31
G. I. Sellon
1902
5
10
130
U.S.A.
Wyoming
Albany
E of Laramie.
-105.5269
41.311
2378
Rocky hillside. Phenology: flowering.
RM
RM
157584
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
1598
George E. Osterhout
1897
6
1
152
U.S.A.
Wyoming
Albany
Laramie Plains: along road from Tie Siding to North Park.
-105.7553
41.0674
2286
Roadside. Phenology: flowering & fruiting.
RM
RM
312168
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
s.n.
George E. Osterhout
1897
6
1
152
U.S.A.
Wyoming
Albany
Laramie Plains: along road from Tie Siding to North Park.
-105.7553
41.0674
2286
Phenology: flowering & fruiting.
RM
RM
393320
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
s.n.
Harold F. Eppson
1942
6
152
U.S.A.
Wyoming
Albany
Campus.
-105.5842
41.311
2195
Phenology: flowering & fruiting.
RM
RM
393331
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
s.n.
Harold F. Eppson
1948
5
30
151
U.S.A.
Wyoming
Albany
E of Laramie.
-105.5078
41.311
2195
2256
Phenology: flowering.
RM
RM
393314
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
s.n.
Harold F. Eppson
1948
5
30
151
U.S.A.
Wyoming
Albany
E of Laramie.
-105.5078
41.2967
2195
2256
Phenology: flowering.
RM
RM
222047
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
s.n.
Harry Hapeman
1920
6
12
164
U.S.A.
Wyoming
Carbon
Hanna.
-106.5647
41.8786
2073
Phenology: flowering & fruiting.
RM
RM
264506
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
161
Herbert G. Fisser
1960
7
11
193
U.S.A.
Wyoming
Fremont
SE of Thermopolis and E of the Wind River Canyon; north flank of the Owl Creek Range: ridgetop NW of Birdseye Pass.
-108.0793
43.4611
2256
Phenology: fruiting.
RM
RM
77772
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
2398
J. Francis Macbride
1914
6
30
181
U.S.A.
Wyoming
Albany
Rock River.
-106.011
41.72
2134
Local in meadows. Phenology: flowering & fruiting.
RM
RM
302987
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
2721
J. Francis Macbride
1914
5
14
134
U.S.A.
Wyoming
Albany
Rock River.
-106.011
41.72
2134
Loamy swales. Phenology: flowering & fruiting.
RM
RM
393322
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
s.n.
J. W. Hamilton C. S. Gilbert
1954
6
14
165
U.S.A.
Wyoming
Big Horn
Wyo Hwy 14, last observation point over Bighorn Basin.
-107.9745
44.8033
1798
1981
Phenology: flowering.
RM
RM
580157
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
89
Jane M. Struttmann
1992
6
14
166
U.S.A.
Wyoming
Albany
Laramie Range: Roger Canyon Rd., 7.1 road mi from dump road, ca 7 air mi NE of Laramie.
-105.4706
41.3889
2286
Rocky hillside with Cercocarpus. Phenology: flowering.
RM
RM
262500
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
315
Jean Finzel
1959
7
9
190
U.S.A.
Wyoming
Albany
Laramie Range: 3 mi S of summit on U.S. Hwy 30.
-105.4314
41.1962
2591
Rolling prairie. Phenology: fruiting.
RM
RM
211397
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
2180
John F. Reed Mildred S. Reed
1948
6
8
160
U.S.A.
Wyoming
Teton
Jackson Hole: near Moose.
-110.7213
43.6669
1981
Big sagebrush flats. *should be ca 6,500 ft* Phenology: flowering & fruiting.
RM
RM
211408
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
2234
John F. Reed Mildred S. Reed
1948
6
10
162
U.S.A.
Wyoming
Teton
Jackson Hole: Near Moose.
-110.7326
43.6569
1981
Big sagebrush community. Phenology: flowering & fruiting.
RM
RM
522892
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
37
Jon Siddoway
1986
7
1
182
U.S.A.
Wyoming
Sheridan
Big Horn Mountains: Burgess Ranger Station; ca 1.5 air mi N of Burgess Junction; ca 28.5 air mi W of Sheridan.
-107.5239
44.7875
2408
Phenology: flowering.
RM
RM
268025
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
104
L. C. Vosler
1961
6
7
158
U.S.A.
Wyoming
Big Horn
Sheep Springs Exclosure; ca 20 mi E of Greybull.
-107.5524
44.422
2317
Phenology: flowering.
RM
RM
268024
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
94
L. C. Vosler
1961
5
11
131
U.S.A.
Wyoming
Big Horn
Horse Creek Exclosure, 5 mi N of Shell.
-107.772
44.6007
1463
Phenology: vegetative only.
RM
RM
37461
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
63
Leslie N. Goodding
1901
6
20
171
U.S.A.
Wyoming
Carbon
TB Ranch.
-106.2005
42.0774
2103
Rocky hillsides. Phenology: fruiting.
RM
RM
318967
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
1761
Linda M. Barker
1978
5
22
142
U.S.A.
Wyoming
Big Horn
Beaver Creek Road near Eagle Rock.
-107.8935
44.6586
1468
Sandy area. Phenology: flowering.
RM
RM
135132
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
1105
Louis O. Williams
1933
6
13
164
U.S.A.
Wyoming
Teton
Near Moose.
-110.7178
43.6565
1981
2042
Dry rocky flats. White flowers. Phenology: flowering.
RM
RM
124642
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
193
Louis O. Williams Rua Pierson
1931
6
22
173
U.S.A.
Wyoming
Teton
Grand Teton National Park: Jenny Lake Canyon.
-110.7851
43.7636
2042
2591
Phenology: flowering.
RM
RM
157583
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
193
Louis O. Williams Rua Pierson
1931
6
22
173
U.S.A.
Wyoming
Teton
Grand Teton National Park: Jenny Lake Canyon.
-110.7851
43.7636
2042
2591
Phenology: flowering.
RM
RM
177564
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
3277
Louis O. Williams Rua P. Williams
1936
7
7
189
U.S.A.
Wyoming
Sheridan
Big Horn Mountains: head of Marcum Creek.
-107.5275
44.7356
2591
Dry hillside. Phenology: fruiting.
RM
RM
300493
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
4666
Marvin L. Roberts
1976
6
24
176
U.S.A.
Wyoming
Sheridan
Big Horn Mountains: just W of Horseshoe Mountain.
-107.3443
44.7908
2347
Common in meadow. Phenology: flowering & fruiting.
RM
RM
276351
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
58
M. N. Aslamy
1964
6
28
180
U.S.A.
Wyoming
Albany
Laramie Range: Pole Mountain District: Medicine Bow National Forest: W of Eagle Rock.
-105.3741
41.2823
2500
2560
North-facing slope; common in open dry places, ranging from bottom to the middle of slope. Phenology: flowering.
RM
RM
338162
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
s.n.
Max H. Schroeder Gary L. Ranck
1972
6
20
172
U.S.A.
Wyoming
Carbon
Stratton Hydrology Study Area: Sane Creek Upland.
-107.1381
41.4181
2134
2439
Sagebrush rangeland. Phenology: flowering & fruiting.
RM
RM
237831
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
K-47
Neland A. Kissinger, Jr.
1952
5
31
152
U.S.A.
Wyoming
Fremont
Rocky Mountain Forest and Range Experiment Station: Beaver Divide.
-108.2773
42.6006
2073
Common in sandy loam soil, 5% southeast slope, in sagebrush-grass type; associated with Artemisia tridentata, Agropyron dasystachyum (A. riparium?), Poa secunda, and P. cusickii. Phenology: flowering.
RM
USFS
402640
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
K-47
Neland A. Kissinger, Jr.
1952
5
31
152
U.S.A.
Wyoming
Fremont
Rocky Mountain Forest and Range Experiment Station: Beaver Divide.
-108.2773
42.6006
2073
Common in sandy loam soil, 5% southeast slope, in sagebrush-grass type; associated with Artemisia tridentata, Agropyron dasystachyum (A. riparium?), Poa secunda, and P. cusickii. Phenology: flowering.
RM
RM
290647
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
5-72
Nellis
1972
6
28
180
U.S.A.
Wyoming
Laramie
Southwest edge of Cheyenne
-104.8302
41.1178
Sandy dry hilltop. Phenology: flowering & fruiting.
RM
RM
130054
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
145
O. J. Murie
1931
6
7
158
U.S.A.
Wyoming
Sublette
80 mi N of Rock Springs.
-109.6848
42.6593
2195
Phenology: flowering.
RM
RM
311137
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
s.n.
Robert E. Pfadt
1940
5
21
142
U.S.A.
Wyoming
Converse
Douglas.
-105.3744
42.7612
1463
Sandy soil. Phenology: flowering & fruiting.
RM
RM
293533
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
184
R. E. Ries D. W. Sabinske
1973
6
13
164
U.S.A.
Wyoming
Campbell
Black Thunder Strip Mining Area: North Prong Thunder Creek and Little Thunder Creek.
-105.2494
43.6576
1448
In breaks associated with big sagebrush, blue grama, western wheatgrass; soil shallow slayey, shale, loamy - Shingle Series, Shale. Phenology: flowering.
RM
RM
391402
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
5
Robert J. Hill
1973
6
7
158
U.S.A.
Wyoming
Albany
Big Hollow, on Rt. 44 between Wyo Hwy 130 and Wyo Hwy 230, W of Laramie in central basin.
-105.8708
41.2967
2256
Commn on roadside. Phenology: flowering.
RM
RM
337741
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
8
R. Olson W. Gerhart, D. Rizor and D. Jones
1981
6
3
154
U.S.A.
Wyoming
Fremont
Game and Fish East Fork Winter Range: East Fork Unit: 1/4 mi above Goose Lake, ca 11.5 air mi NE of Dubois.
2219
Growing in loam to clay in spring bottom to above spring on dry hill (southwest facing, 5-15% slope); dominants include willow, sedge, and grass in riparian area and big sagebrush, Poa and Agropyron on dry hill. Phenology: flowering.
RM
RM
316781
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
18
Ray A. Christensen
1979
6
6
157
U.S.A.
Wyoming
Sweetwater
Ca 46 air mi SW of Pilot Butte, ca 35 air mi SW of Green River.
-109.9715
41.165
2487
Associated with Artemisia tridentata, Symphoricarpos oreophilus, Poa fendleriana, and Koeleria cristata on shallow loamy soil in sagebrush-grassland. Phenology: flowering.
RM
RM
358040
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
57167
Reed C. Rollins Richard C. Rollins
1957
7
10
191
U.S.A.
Wyoming
Sheridan
East slope Big Horn Mountains: East Fork of Big Goose Creek.
-107.2025
44.5998
2378
Dry meadow. Phenology: flowering & fruiting.
RM
RM
293338
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
14
Richard F. Harner
1974
6
8
159
U.S.A.
Wyoming
Campbell
N of Gillette.
-105.4392
44.4344
1387
Sagebrush-grassland association. Phenology: flowering & fruiting.
RM
RM
383385
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
4115
Richard W. Scott
1985
5
24
144
U.S.A.
Wyoming
Fremont
On the edge of the Red Desert: North Oregon Butte.
-108.837
42.2576
2439
2621
Phenology: flowering.
RM
RM
279990
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
453
Richard W. Scott
1965
6
24
175
U.S.A.
Wyoming
Fremont
Wind River Range: Dickinson Park, along Dickinson Creek.
-109.0655
42.8613
2835
Meadows along creek. Phenology: flowering & fruiting.
RM
RM
353492
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
4042
Robert D. Dorn
1984
6
21
173
U.S.A.
Wyoming
Lincoln
-110.7807
41.8673
2195
Wet meadow with Camassia, Allium geyeri. Phenology: flowering.
RM
RM
566719
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
5136
Robert D. Dorn
1991
5
27
147
U.S.A.
Wyoming
Converse
Bill.
-105.2703
43.2408
1432
Grassland with Bromus tectorum, Poa. Phenology: flowering & fruiting.
RM
RM
393319
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
322
Robert M. Muir
1938
6
14
165
U.S.A.
Wyoming
Fremont
Wind River Mountains.
-109.0604
43.0337
2073
Sandy soil, grassland, Chugwater (?) formation. Phenology: flowering & fruiting.
RM
RM
393321
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
322
Robert M. Muir
1938
6
14
165
U.S.A.
Wyoming
Fremont
Wind River Mountains.
-109.0604
43.0337
2073
Sandy soil, grassland, Chugwater (?) formation. Phenology: flowering & fruiting.
RM
RM
316020
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
258
Robert W. Lichvar
1977
6
5
156
U.S.A.
Wyoming
Teton
Gros Ventre Mountains: Curtis Canyon.
-110.6561
43.5188
2439
Infrequent in dark soil with Artemisia sp. and Antennaria sp. Phenology: flowering.
RM
RM
316018
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
269
Robert W. Lichvar Bill Mechum
1977
6
6
157
U.S.A.
Wyoming
Teton
Gros Ventre Mountains: National Elk Refuge.
-110.5964
43.6052
2225
Infrequent in light, dry soil with Artemisia sp. and Potentilla sp. Phenology: flowering.
RM
RM
541149
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
62
Robin Jones
1988
6
28
180
U.S.A.
Wyoming
Fremont
Bank of Sweetwater River near Wyo Hwy 28.
-108.8954
42.3894
2268
Phenology: flowering.
RM
RM
745591
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
26054
Sherel Goodrich
1999
7
2
183
U.S.A.
Wyoming
Sweetwater
Wasatch-Cache Nat'l Forest, Uinta Mts, between Gourley Meadow and Cottonwood Creek.
Dry meadow on old moraine with Kentucky bluegrass. Phenology: flowering & fruiting.
RM
USFS
402638
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
181
Silas W. Yarnall
1911
6
12
163
U.S.A.
Wyoming
Fremont
Washakie National Forest: Pass Creek.
-108.766
42.63
2317
Sandy loam soil. Phenology: flowering.
RM
RM
288145
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
131
Seymour S. Sharp
1912
6
17
169
U.S.A.
Wyoming
Sheridan
Hills E of Sheridan.
1189
Rocky slope. Phenology: flowering & fruiting.
RM
RM
309844
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
s.n.
Steve Skelton
1978
5
17
137
U.S.A.
Wyoming
Converse
Hardy Project Uranium Mine; ca 40 air mi NW of Douglas.
-105.6288
43.2495
1524
1554
Growing in sand blow-out in sagebrush-grassland. Phenology: flowering.
RM
USFS
402637
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
289
W. F. Goodman
1915
6
14
165
U.S.A.
Wyoming
Park
Shoshone National Forest: ridges between Coe Lodge and Bull Creek.
-109.2672
44.3352
2073
Scarce in sandy loam soil on ridges. Phenology: flowering.
RM
RM
57791
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
27y
W. S. Cooper
1906
7
13
194
U.S.A.
Wyoming
Park
Yellowstone National Park: Mammoth Hot Springs.
-110.7153
44.9659
1920
2073
Phenology: flowering & fruiting.
RM
RM
632762
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
13685
Walter Fertig
1993
5
28
148
U.S.A.
Wyoming
Fremont
Sweetwater River Valley: ruts in two track road along section-line fence on north side of Sweetwater River, ca 5 air mi SW of U.S. Hwy 287. TNC Sweetwater Preserve.
-108.2968
42.4832
2018
South-facing slopes and summit of sandy-gravelly siltstone ridge; cushion plant community with scattered sagebrush on ridgetops. Phenology: flowering.
RM
RM
703773
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
18143
Walter Fertig
1998
5
24
144
U.S.A.
Wyoming
Albany
Laramie Range: 3 mi E of downtown Laramie and 1/4 mi N of U.S. Hwy 30, ca 1 mi N of junction of U.S. Hwy 30 and I-80 and ca 0.4 mi SE of Spring Creek.
2210
Brownish clay-sandy soil in narrow cracks and wedges within extensive limestone bedrock flats of gray metamorphic limestone. Community of Cercocarpus montanus/Koeleria macrantha with scattered Chrysothamnus viscidiflorus, Ribes cereum, Poa secunda, and Phenology: flowering & fruiting.
RM
USFS
410271
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
107
William J. Cochran
1932
5
24
145
U.S.A.
Wyoming
Big Horn
Big Horn National Forest: Paintrock Lakes Road.
-107.5323
44.2918
1676
Abundant on dry slopes in loose sandy soil, 30% west exposure, with juniper, sagebrush, and larkspur. Phenology: buds.
RM
USFS
410270
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
208
William J. Cochran
1934
5
28
148
U.S.A.
Wyoming
Big Horn
Big Horn National Forest: Old Mill Set.
-107.4149
44.3208
2530
Moderately abundant in parks with grass-weed. Phenology: flowering.
RM
RM
86872
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
97
Wright L. Hess
1915
7
20
201
U.S.A.
Wyoming
Niobrara
Western part of the Great Plains Prairie at Jireh.
-104.7172
42.7655
1631
In sandy-silt loam. Phenology: flowering.
RM
RM
338162
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
s.n.
Max H. Schroeder Gary L. Ranck
1972
6
20
172
U.S.A.
Wyoming
Carbon
Stratton Hydrology Study Area: Sane Creek.
-107.1376
41.4179
2134
2439
Sagebrush rangeland. Phenology: flowering & fruiting.
RM
RM
353492
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
4042
Robert D. Dorn
1984
6
21
173
U.S.A.
Wyoming
Lincoln
-110.7807
41.8673
2195
Wet meadow with Camassia, Allium geyeri. Phenology: flowering.
RM
RM
566719
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
5136
Robert D. Dorn
1991
5
27
147
U.S.A.
Wyoming
Converse
Bill.
-105.2703
43.2408
1432
Grassland with Bromus tectorum, Poa. Phenology: flowering & fruiting.
RM
RM
295436
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
3063
Ronald L. Hartman
1970
5
23
143
U.S.A.
Wyoming
Albany
9th Street Road, ca 9 mi NE of Laramie.
13
2408
Common on south exposure with Artemisia sp. and Cercocarpus montanus. Phenology: flowering.
RM
RM
758060
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
67289
Ronald L. Hartman
2000
6
6
158
U.S.A.
Colorado
Moffat
North-central Colorado: County Road 38, ca 22 air mi N of Craig.
-107.5548
40.8235
1981
2012
Sagebrush and Amelanchier. Phenology: fruiting.
RM
RM
762926
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
70489
Ronald L. Hartman
2001
5
23
143
U.S.A.
Colorado
Moffat
North-central Colorado: Cedar Mountain, ca 6 air mi NW of Craig.
-107.611
40.5791
2195
2225
Volcanic rocks exposed sporadically on southwest slope to summit; Utah juniper, serviceberry, antelope bitterbrush, etc. with scattered sagebrush. Phenology: flowering.
RM
RM
762925
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
70544
Ronald L. Hartman
2001
5
23
143
U.S.A.
Colorado
Moffat
North-central Colorado: Wymore Gulch, ca 7 air mi NE of Craig.
-107.4408
40.5934
2103
Sagebrush slopes. Phenology: flowering.
RM
RM
834208
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
68315
B. E. Nelson
2006
6
5
156
U.S.A.
Wyoming
Teton
Grand Teton National Park and Vicinity: Jackson Hole: flood plain and bluff between the Snake River and The Potholes, ca 5.5 air mi SW of Moran; ca 23.5 air mi NNE of Jackson.
-110.5899
43.7907
2042
2073
Valley bottom with overflow channels, cottonwood grove, and sagebrush flats. Phenology: flowering.
RM
RM
834207
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
68405
B. E. Nelson
2006
6
5
156
U.S.A.
Wyoming
Teton
Grand Teton National Park and Vicinity: Jackson Hole: along dirt road above and W of the Snake River at the south end of Burnt Ridge, ca 7.5 air mi NNE of Moose; ca 20 air mi NNE of Jackson.
-110.6552
43.7544
2085
2094
Shallow snow drift area. Phenology: flowering.
RM
RM
834206
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
68530
B. E. Nelson David Scott, Nancy Bockino
2006
6
9
160
U.S.A.
Wyoming
Teton
Grand Teton National Park and Vicinity: Teton Range: Apex Trail at the east base of Teewinot Mountain above Lupine Meadows, ca 6 air mi NNW of Moose; ca 18 air mi N of Jackson.
-110.7533
43.7393
2134
2439
Gentle slope of exposed bedrock with patches of soil. Phenology: flowering.
RM
RM
834223
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
501
David Scott Nancy Bockino
2006
6
12
163
U.S.A.
Wyoming
Teton
Grand Teton National Park and Vicinity: Jackson Hole: Uhl Hill, ca 1.5 air mi S of Moran; ca 16 air mi NE of Moose.
-110.4891
43.8166
2246
Steep, dry slope with sandy soils and scattered Pseudotsuga menziesii and Pinus flexilis. Phenology: flowering.
RM
RM
834201
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
726
David Scott Geneva Chong
2006
6
19
170
U.S.A.
Wyoming
Teton
Grand Teton National Park and Vicinity: Jackson Hole: near Gros Ventre Junction, ca 4 air mi S of Moose; ca 9 air mi NNE of Jackson.
-110.7009
43.5984
2000
Area burned in 2003 wildfire. Phenology: flowering.
RM
RM
99291
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
108
A. C. McIntosh
1924
5
26
147
U.S.A.
South Dakota
Lawrence
Little Elk Canyon.
-103.4892
44.2374
1259
1542
Rocky open slope. Phenology: flowering.
RM
RM
313891
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
s.n.
Alice D. Pratt
1895
6
152
U.S.A.
South Dakota
Meade
Piedmont.
-103.389
44.2316
1064
Phenology: flowering.
RM
RM
8962
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
s.n.
Alice D. Pratt
1895
6
152
U.S.A.
South Dakota
Meade
Piedmont.
-103.389
44.2316
1064
Phenology: flowering.
RM
RM
99291
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
108
Arthur C. McIntosh
1924
5
26
147
U.S.A.
South Dakota
Lawrence
Little Elk Canyon.
-103.4892
44.2374
1259
1542
Rocky open slope. Phenology: flowering.
RM
USFS
443098
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
54
C. M. Hubbard
1914
5
22
142
U.S.A.
South Dakota
Harding
Custer National Forest: Jesse Elliott Ranger Station.
-103.1738
45.3899
1000
Phenology: buds.
RM
USFS
443126
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
566
Charles P. Pase
1956
6
20
172
U.S.A.
South Dakota
Custer
Black Hills National Forest: Doll Ranch.
-103.7287
43.8466
1957
On 6% south slope; silt soil; open pine type with Poa pratensis, Antennaria spp., and Thermopsis rhombifolia. Phenology: flowering.
RM
USFS
443128
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
818
Charles P. Pase
1957
6
3
154
U.S.A.
South Dakota
Pennington
Black Hills National Forest: 1 mi S of Rapid City.
-103.2299
44.0467
1067
On 20 percent southeast slope; sandy soil; mixed prairie type with Poa pratensis, Koeleria cristata, Stipa comata, Artemisia frigida. Phenology: flowering.
RM
USFS
443127
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
821
Charles P. Pase
1957
6
11
162
U.S.A.
South Dakota
Pennington
Black Hills National Forest: Gold Run.
-103.7824
43.9951
1844
On 30% southwest slope; shallow limestone soil; mixed prairie type with Sporobolus heterolepis, Koeleria cristata, and Carex spp. Lat/Long on NE cor S8 (USGS 7.5) G. Bryson Phenology: flowering.
RM
RM
304624
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
1055
Herman E. Hayward
1927
6
17
168
U.S.A.
South Dakota
Meade
Sturgis.
-103.5185
44.4088
1030
1109
Red foot hills; grass association. Phenology: flowering & fruiting.
RM
RM
304623
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
1536
Herman E. Hayward
1927
6
27
178
U.S.A.
South Dakota
Custer
Buffalo Gap.
-103.3124
43.4923
975
1067
Red foot hills; grass association. Phenology: flowering & fruiting.
RM
RM
304622
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
1896
Herman E. Hayward
1927
7
4
185
U.S.A.
South Dakota
Lawrence
Terry Peak above Trojan.
-103.8367
44.3317
2042
Mountain slopes; second succession, popple and birch association. Phenology: flowering & fruiting.
RM
RM
110636
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
2366
Herman E. Hayward
1927
7
23
204
U.S.A.
South Dakota
Pennington
Reynold's Prairie 2 mi NE of [Inundated] Deerfield.
-103.7931
44.0404
1841
Open grassland; grass association; xero-mesophytic. Phenology: fruiting.
RM
RM
365782
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
9441
Hollis Marriott
1985
5
13
133
U.S.A.
South Dakota
Custer
Jewel Cave National Monument: slope SW of Visitors Center above Lithograph Canyon.
-103.8301
43.7288
1631
Grassy opening in ponderosa pine forest. Phenology: flowering.
RM
RM
345332
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
261
K. E. Severson E. C. Garrett
1973
6
14
165
U.S.A.
South Dakota
Jackson
Buffalo Gap National Grasslands, 3 mi S, 1 mi W Cactus Flats.
-101.915
43.7927
786
823
Sandy clay soil; with Agropyron smithii, Bromus japonica, Me[lilotus] of[ficinalis]. Elev closer to 2600 f (USGS 7.5') G. Bryson Phenology: flowering & fruiting.
RM
USFS
443097
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
38-SP19
Louis W. Shevling
1914
6
4
155
U.S.A.
South Dakota
Harding
Custer National Forest: East Short Pine Hills.
-103.7163
45.3634
914
1219
Sandy loam and gumbo; mesas and foothills. Phenology: flowering.
RM
RM
678223
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
1015
Amy J. Roderick
1997
6
23
174
U.S.A.
Wyoming
Albany
Laramie Range: south end of George Creek and vicinity, ca 4 air mi SE of Garrett.
-105.5767
42.0676
2243
2256
Sandy and gravelly areas in sagebrush grasslands with granite outcrops. Phenology: fruiting.
RM
RM
678222
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
1053
Amy J. Roderick
1997
6
23
174
U.S.A.
Wyoming
Albany
Laramie Range: along Palmer Canyon or County Road 721, ca 10.7 air mi S of Garrett; ca 24.6 air mi NE of Rock River.
-105.6155
41.9512
2234
2298
Northwest facing red sandy slope with a limestone ridge, grasses and scattered limber pine common. Phenology: fruiting.
RM
RM
69809
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
981
S. S. Visher
1910
8
20
232
U.S.A.
South Dakota
Harding
East Short Pine Hills.
-103.7163
45.3634
914
1219
Steppe. Phenology: fruiting.
RM
RM
117280
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
18084
W. H. Over
1929
7
6
187
U.S.A.
South Dakota
Custer
Western portion of county.
Open hillsides. Phenology: fruiting.
RM
RM
397505
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
2619
Betsy E. Neely
1985
6
1
152
U.S.A.
Colorado
Larimer
0.25 mi W of U.S. Hwy 287; 21.9 mi S of Virginia Dale.
East-facing sandstone bluffs with limestone caps associated with mountain mahogany and skunkbrush. Phenology: flowering & fruiting.
RM
RM
172994
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
s.n.
C. M. Brown
1938
6
27
178
U.S.A.
Colorado
Larimer
4 mi W of Fort Collins.
Heavily grazed pasture. Phenology: flowering & fruiting.
RM
RM
45246
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
2404
C. S. Crandall
1898
5
24
144
U.S.A.
Colorado
Larimer
E Fort Collins: along railroad.
Phenology: flowering & fruiting.
RM
RM
8961
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
10561
Carl F. Baker
1895
5
12
132
U.S.A.
Colorado
Larimer
1676
Hills. Phenology: flowering & fruiting.
RM
RM
227941
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
551
E. Hall J. P. Harbour
1862
U.S.A.
Colorado
no county
Phenology: vegetative only.
RM
RM
81033
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
100
Edwin B. Payson
1913
6
1
152
U.S.A.
Colorado
Montrose
Lower Gunnison Canyon.
2439
Open meadow. Phenology: flowering & fruiting.
RM
RM
678221
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
1342
B. A. Packer J. Brondum, T. McGowan, and J. Wilson
1997
7
3
184
U.S.A.
Wyoming
Albany
Laramie Range: Sherman Mountains: ca 7.5 air mi SE of Laramie.
-105.4497
41.2253
2637
2655
Pine-fir forest; windswept mountain side. Phenology: fruiting.
RM
RM
52998
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
1028
Francis Ramaley
1905
5
30
150
U.S.A.
Colorado
Boulder
Near Boulder.
1700
Phenology: flowering & fruiting.
RM
RM
172600
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
15959
Francis Ramaley
1937
5
14
134
U.S.A.
Colorado
Boulder
White Rocks: near Boulder.
Open site in sandy soil. Phenology: flowering & fruiting.
RM
RM
23348
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
A. 177
Francis Ramaley
1900
5
29
149
U.S.A.
Colorado
Boulder
Near Boulder.
Phenology: flowering & fruiting.
RM
RM
47772
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
5512
Frank Tweedy
1902
6
3
154
U.S.A.
Colorado
Boulder
Near Boulder.
1524
1829
Plains and foothills. Phenology: flowering & fruiting.
RM
RM
56944
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
2089
G. S. Dodds
1906
7
1
182
U.S.A.
Colorado
Weld
Pawnee Buttes.
Phenology: fruiting.
RM
RM
157588
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
1199
George E. Osterhout
1895
5
25
145
U.S.A.
Colorado
Larimer
Spring Canyon.
Phenology: flowering & fruiting.
RM
RM
157587
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
194
George E. Osterhout
1892
6
3
155
U.S.A.
Colorado
Weld
New Windsor.
Phenology: fruiting.
RM
RM
157589
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
2906
George E. Osterhout
1904
5
24
145
U.S.A.
Colorado
Weld
New Windsor.
South of river. Phenology: flowering & fruiting.
RM
RM
50957
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
2906
George E. Osterhout
1904
5
24
145
U.S.A.
Colorado
Weld
New Windsor.
Phenology: flowering & fruiting.
RM
RM
157590
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
4687
George E. Osterhout
1912
5
25
146
U.S.A.
Colorado
Larimer?
Routts Ranch.
Phenology: flowering & fruiting.
RM
RM
84302
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
4687
George E. Osterhout
1912
5
25
146
U.S.A.
Colorado
Larimer
S of Ingleside.
Phenology: flowering & fruiting.
RM
RM
312164
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
sn
George E. Osterhout
1909
6
4
155
U.S.A.
Colorado
Weld
Windsor.
Phenology: flowering & fruiting.
RM
RM
95428
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
3081
Ira W. Clokey
1918
5
25
145
U.S.A.
Colorado
Jefferson
Limon.
1676
Prairie. Phenology: flowering & fruiting.
RM
RM
101911
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
806
Johnston Hedgcock
1917
6
22
173
U.S.A.
Colorado
Huerfano
La Veta: road to Walsenburg.
Phenology: fruiting.
RM
RM
678232
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
168
B. A. Packer J. Brondum, T. McGowan, and J. Wilson
1997
6
10
161
U.S.A.
Wyoming
Albany
Laramie Range: ca 15 air mi NE of Laramie.
-105.2964
41.3991
2277
2295
Sagebrush grassland. Phenology: flowering.
RM
RM
107148
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
6425
P. A. Rydberg F. K. Vreeland
1900
5
18
138
U.S.A.
Colorado
Huerfano
SE of La Veta.
670
701
Hills. Also Las Animas County. Phenology: vegetative only.
RM
RM
29796
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
6425
P. A. Rydberg F. K. Vreeland
1900
5
18
138
U.S.A.
Colorado
Huerfano
SE of La Veta.
670
701
Hills. Phenology: flowering & fruiting.
RM
USFS
443125
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
577
Paul L. Ginter
1941
5
31
151
U.S.A.
Colorado
Larimer
Roosevelt National Forest: Rist Canyon.
-105.2212
40.6331
1646
Rare in grassy area on 30% slope, northeast exposure in deep gravelly silt. Phenology: flowering & fruiting.
RM
USFS
443138
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
818
Paul L. Ginter
1943
5
27
147
U.S.A.
Colorado
Larimer
3 mi SE of Windsor.
1417
Occasional in pastures on 50% slope, south exposure in sandy loam. Phenology: flowering & fruiting.
RM
RM
171993
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
22
Robert M. Muir
1937
6
15
166
U.S.A.
Colorado
Weld
-104.7243
40.8358
1524
Dry creek wash in sandy loam. Phenology: flowering & fruiting.
RM
RM
395368
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
2429
Steve L. O'Kane Jr.
1986
6
14
165
U.S.A.
Colorado
Rio Blanco
Ridge N of Trail Canyon; ca 0.5 mi E of Calamity Ridge.
2493
Scattered on ridgetop with Poa, Astragalus, Machaeranthera and Allium. Phenology: flowering & fruiting.
RM
RM
577109
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
1628
Tim Hogan
1992
5
14
135
U.S.A.
Colorado
Boulder
Boulder Mountain Parks: Chautauqua Meadow.
1737
Lush foothills meadow with native and adventive ssp. Phenology: flowering & fruiting.
RM
RM
678231
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
203
B. A. Packer J. Brondum and T. McGowan
1997
6
12
163
U.S.A.
Wyoming
Albany
Laramie Range: Plumbago Canyon, ca 10.2 road mi NE of U.S. Hwys 30/287 on Wyo Hwy 34; ca 22.4 road mi NE of Laramie.
-105.5279
41.6619
2192
2213
Sagebrush grassland with sandy, dry soil. Phenology: flowering.
RM
RM
64689
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
4893
W. W. Robbins
1908
6
6
158
U.S.A.
Colorado
Pueblo
Beulah.
Phenology: flowering & fruiting.
RM
USFS
443124
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
P-31
Walter E. Pool
1940
5
3
124
U.S.A.
Colorado
Montrose
Uncompaghre National Forest: Nucla.
-108.5466
38.2409
1524
Common on 10% slope, north exposure in clay loam. Phenology: flowering & fruiting.
RM
RM
665914
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
3835
Amy J. Roderick
1998
5
21
141
U.S.A.
Wyoming
Carbon
Upper North Platte and Laramie River Drainages: E of Wyo Hwy 487, ca 3.5 air mi E of Chalk Mountain on the northwestern rim of Shirley Basin.
-106.4034
42.3541
2179
Sandy-gravelly hills of sagebrush, grasses, and forbs. Phenology: flowering.
RM
RM
667065
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
384
Amy J. Roderick
1997
6
3
154
U.S.A.
Wyoming
Carbon
Upper North Platte and Laramie River Drainages: bluff abutting dirt road leading to Sunshine Beach in Seminoe State Park, ca 2.4 air mi S of Seminoe Dam; ca 25.5 air mi NE of Sinclair.
-106.9097
42.1229
2042
Calcareous and sandy substrate of bluff dominated by mountain mahogany and sagebrush. Phenology: flowering.
RM
RM
665913
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
3897
Amy J. Roderick
1998
5
24
144
U.S.A.
Wyoming
Natrona
Upper North Platte and Laramie River Drainages: Emigrant Gap Ridge, ca 3.5 air mi S of U.S. Hwy 20/26; ca 14.8 mi WNW of Casper.
-106.608
42.8876
1737
Rocky hills of sagebrush-grassland and grassy draws. Phenology: flowering & fruiting.
RM
RM
678230
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
287
B. A. Packer J. Brondum and T. McGowan
1997
6
12
163
U.S.A.
Wyoming
Albany
Laramie Range: Elmers Rock, along unnamed spur of Laramie River, ca 13 air mi N of Wyo Hwy 34; ca 40.5 air mi NE of Laramie.
-105.4188
41.9519
2112
Granite rock outcrops with pine and juniper. Phenology: flowering & fruiting.
RM
RM
678229
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
340
B. A. Packer J. Brondum and T. McGowan
1997
6
17
168
U.S.A.
Wyoming
Laramie
Laramie Range: ca 1.5 road mi S of Federal; ca 25 air mi NE of Laramie.
-105.1216
41.2441
2015
2030
Sandstone cliffs. Phenology: flowering & fruiting.
RM
RM
678228
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
564
B. A. Packer J. Brondum and T. McGowan
1997
6
20
171
U.S.A.
Wyoming
Albany
Laramie Range: Forest Road 703, ca 12 road mi SE of Laramie.
-105.4497
41.2684
2618
Windswept granite mountain top. Phenology: flowering.
RM
RM
678227
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
677
B. A. Packer J. Brondum and T. McGowan
1997
6
23
174
U.S.A.
Wyoming
Albany
Laramie Range: ca 20.5 road mi NE of U.S. Hwy 30/287 on Fetterman Road (County Road 161), then ca 8.2 road mi E on County Road 710, then ca 1.8 road mi SE on Cow Creek Mountain Access Road.
-105.5857
42.2241
2500
2530
Mountain with granite outcrops. Phenology: flowering.
RM
RM
665940
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
3970
Amy J. Roderick
1998
5
25
145
U.S.A.
Wyoming
Natrona
Upper North Platte and Laramie River Drainages: along County Road 210, ca 1 air mi W of Poison Spider Oil Field; ca 24 air mi W of Casper.
-106.785
42.8584
1768
Rocky ridges of sagebrush-grassland. Phenology: flowering & fruiting.
RM
RM
678226
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
735
B. A. Packer J. Brondum and T. McGowan
1997
6
24
175
U.S.A.
Wyoming
Albany
Laramie Range: North Laramie River, ca 17.5 road mi N on Fetterman Road (County Road 161); ca 60 mi N of Laramie.
-105.722
42.1374
2134
Cow pasture along river. Phenology: flowering.
RM
RM
678225
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
908
B. A. Packer J. Brondum and T. McGowan
1997
6
26
177
U.S.A.
Wyoming
Albany
Laramie Range: Boulder Ridge, ca 14 air mi S of Laramie.
-105.5834
41.0961
2423
Red beds with Cercocarpus grassland. Phenology: fruiting.
RM
RM
678224
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
946
B. A. Packer J. Brondum and T. McGowan
1997
6
26
177
U.S.A.
Wyoming
Albany
Laramie Range: County Road 316, ca 14 road mi off U.S. Hwy 287; ca 14 road mi on U.S. 287 from Laramie.
-105.7553
41.053
2292
2314
Sandstone outcrop. Phenology: fruiting.
RM
RM
678220
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
40526
B. E. Nelson
1997
6
22
173
U.S.A.
Wyoming
Natrona
Laramie Range: rim above the heads of Big Red and Clear Fork Muddy creeks S of Casper Mountain and W of Muddy Mountain, ca 11 air mi S of Casper.
-106.3149
42.686
2256
2347
Open mixed woods with areas of sagebrush. Phenology: flowering.
RM
RM
665939
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
4013
Amy J. Roderick
1998
5
27
147
U.S.A.
Wyoming
Carbon
Upper North Platte and Laramie River Drainages: ca 2 air mi from Horse Peak; ca 2 air mi from junction of Wyo Hwy 77 and 487.
-106.4619
42.4119
2073
Calcareous gravel two-track through rolling grasslands. Phenology: flowering & fruiting.
RM
RM
678219
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
40675
B. E. Nelson
1997
6
22
173
U.S.A.
Wyoming
Natrona
Laramie Range: E of Little Red Creek on the southwest side of Casper Mountain, ca 10.5 air mi SW of Casper.
1859
1951
Steep, rocky slope with juniper. Phenology: fruiting.
RM
RM
678218
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
40700
B. E. Nelson
1997
6
23
174
U.S.A.
Wyoming
Natrona
Laramie Range: E of Corral Creek and Old Casper/Medicine Bow Hwy or County Road 402, ca 15 air mi S of Casper.
-106.3542
42.6277
1981
2134
Rocky top of ridge and nearly level areas near the top. Phenology: fruiting.
RM
RM
665938
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
4083
Amy J. Roderick
1998
5
28
148
U.S.A.
Wyoming
Carbon
Upper North Platte and Laramie River Drainages: Shirley Basin: Sand Creek, ca 1.5 air mi S of BLM 3144 or Antelope Road; ca 7.2 air mi S of junction of Wyo Hwy 77 and 487.
-106.345
42.3252
2179
Sagebrush-grassland. Phenology: flowering.
RM
RM
665937
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
4128
Amy J. Roderick
1998
5
28
148
U.S.A.
Wyoming
Natrona
Upper North Platte and Laramie River Drainages: Bates Hole E of Wyo Hwy 487, ca 3 air mi NNW of junction with Wyo Hwy 77 and 487.
-106.4328
42.4529
1951
Sandy draw lined with Cercocarpus, Amelanchier, Purshia, and Symphoricarpos. Phenology: flowering.
RM
RM
678217
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
56952
Ronald L. Hartman B. A. Packer and Amy J. Roderick
1997
6
5
156
U.S.A.
Wyoming
Albany
Laramie Range: ca 0.5-1.5 air mi NE of Marshall.
-105.8388
42.3108
2225
2286
Granitic outcrop with ponderosa and limber pine and Rocky Mountain juniper. Phenology: flowering.
RM
RM
665936
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
4208
Amy J. Roderick
1998
5
30
150
U.S.A.
Wyoming
Natrona
Upper North Platte and Laramie River Drainages: north side of Bessemer Mountain, ca 13.7 air mi SW of Casper.
-106.5508
42.7443
1768
1920
Calcareous slopes and red buttes of sagebrush and scattered Utah juniper. Phenology: flowering & fruiting.
RM
RM
678216
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
57614
Ronald L. Hartman B. A. Packer
1997
6
11
162
U.S.A.
Wyoming
Natrona
Laramie Range: Twin Buttes E and N along limestone cap and SW on two track to Sand Draw.
-106.4132
42.5403
1890
2012
Calcareous substrate above, shale below. Phenology: flowering & fruiting.
RM
RM
678215
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
57680
Ronald L. Hartman Timothy W. Chumley
1997
6
18
169
U.S.A.
Wyoming
Albany
Laramie Range: Wyo Hwy 34, ca 0.5-1.5 air mi NW of Plumbago Canyon turnoff.
-105.5279
41.6619
2195
2286
Sandy areas and sandstone with limestone at higher elevation. Phenology: flowering & fruiting.
RM
RM
678214
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
57759
Ronald L. Hartman Timothy W. Chumley
1997
6
18
169
U.S.A.
Wyoming
Albany
[location and coordinates withheld]
2195
2317
Sagebrush-grasslands and limestone outcrops on ridge. Phenology: flowering.
RM
RM
678213
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
57802
Ronald L. Hartman Timothy W. Chumley
1997
6
18
169
U.S.A.
Wyoming
Albany
Laramie Range: Morton Pass and N and NE to 0.7 air mi.
-105.5279
41.6911
2195
2256
Calcareous substrate with short strip of granite. Phenology: fruiting.
RM
RM
678212
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
57840
Ronald L. Hartman Timothy W. Chumley
1997
6
18
169
U.S.A.
Wyoming
Albany
Laramie Range: Morton Pass and N and NE to 0.7 air mi.
-105.5279
41.6911
2195
2256
Calcareous substrate with short strip of granite. Phenology: flowering & fruiting.
RM
RM
678211
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
57876
Ronald L. Hartman Timothy W. Chumley
1997
6
18
169
U.S.A.
Wyoming
Albany
[location and coordinates withheld]
2195
2256
Calcareous area. Phenology: flowering.
RM
RM
678210
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
57905
Ronald L. Hartman
1997
6
20
171
U.S.A.
Wyoming
Albany
Laramie Range: ca 4.5 air mi N of north end of Wheatland Reservoir No. 2.
-105.5961
41.9658
2164
2225
Granitic outcrops and derivative soil. Phenology: fruiting.
RM
RM
678209
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
57994
Ronald L. Hartman
1997
6
21
172
U.S.A.
Wyoming
Albany
Laramie Range: headwaters of Pinto Creek, ca 9 air mi SW of Garrett.
-105.7513
42.024
2103
2195
Sagebrush-grassland with granite outcrop and limestone leaching (?) from above. Phenology: fruiting.
RM
RM
678208
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
58064
Ronald L. Hartman
1997
6
21
172
U.S.A.
Wyoming
Albany
Laramie Range: SW of Mule Creek crossing and along Mule Creek, ca 6 air mi SSE of Marshall.
-105.8193
42.1952
2134
2164
Sandstone and limestone caprock and adjacent flats, also along the creek. Phenology: fruiting.
RM
RM
678207
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
58121
Ronald L. Hartman
1997
6
21
172
U.S.A.
Wyoming
Albany
Laramie Range: Red Hill, ca 4 air mi N of Wheatland Reservoir No. 3.
-105.7319
41.9512
2164
2225
Sagebrush-grassland and calcareous rocky bench with juniper and limber pine. Phenology: fruiting.
RM
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
45492
Ronald L. Hartman Tom Cramer and Charmaine Refsdal
1994
5
26
146
U.S.A.
Wyoming
Lincoln
Southern Salt River Range and Vicinity: Hams Fork Plateau: Schuster Basin, ca 14 air mi NW of Kemmerer.
-110.737778
41.931944
2256
2378
Sagebrush slopes, steep calcareous outcrops on slumped slopes, and aspen woodlands. Phenology: flowering.
RM
RM
678206
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
58287
Ronald L. Hartman
1997
6
25
176
U.S.A.
Wyoming
Albany
Laramie Range: extreme west end of Bluegrass Ridge, ca 11 air mi N of Morton Pass.
-105.5379
41.8348
2134
2225
Granite interfacing with limestone; limestone. Phenology: fruiting.
RM
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
45646
Ronald L. Hartman Tom Cramer
1994
5
28
148
U.S.A.
Wyoming
Lincoln
Southern Salt River Range and Vicinity: Wheat Creek to Windy Gap and Oyster Ridge, ca 14 air mi N of Kemmerer.
-110.505
41.999722
2256
2439
Sagebrush slopes, sandstone and limestone outcrops, cushion plant communities on ridge, wet draws and stream margins. Phenology: flowering.
RM
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
22118
B. E. Nelson Michelle Nelson
1992
5
31
152
U.S.A.
Idaho
Clark
Targhee National Forest: Western Centennial Mountains: along Middle Threemile Creek, ca 1.5 air mi W of Opal Mountain; ca 15 air mi NNE of Dubois.
-112.126
44.3825
1890
Sagebrush-grassland.
RM
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
22197
B. E. Nelson Michelle Nelson
1992
6
1
153
U.S.A.
Idaho
Clark
Targhee National Forest: Western Centennial Mountains: south side of Continental Divide ca 1 air mi E of Bannack Pass, ca 34 air mi NW of Dubois.
-112.7742
44.482
2408
2469
Grass-forb slope and ridgetop.
RM
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
22297
B. E. Nelson Michelle Nelson
1992
6
3
155
U.S.A.
Idaho
Clark
Targhee National Forest: Western Centennial Mountains: on the Continental Divide at the head of East Fork Irving Creek between Knob Mountain and The Thumb, ca 27 air mi NW of Dubois.
-112.5729
44.482
2560
2682
Meadows and grassy areas.
RM
RM
678205
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
58443
Ronald L. Hartman
1997
6
25
176
U.S.A.
Wyoming
Albany
Laramie Range: 1-2 air mi N of entrance to Roger Canyon.
-105.5086
41.4137
2225
Calcareous substrate. Phenology: fruiting.
RM
RM
678204
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
58508
Ronald L. Hartman
1997
6
29
180
U.S.A.
Wyoming
Albany
[location and coordinates withheld]
2103
Roadside. Phenology: fruiting.
RM
RM
679559
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
3211
B. A. Packer T. McGowan
1998
6
19
170
U.S.A.
Wyoming
Converse
Laramie Range: Brae Road, ca 4 mi W of Esterbrook; ca 32 road mi SW of Douglas.
-105.4319
42.4103
2134
2195
Along north facing slope of sagebrush grassland. Phenology: flowering & fruiting.
RM
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
1027
Stuart Markow
1991
6
20
171
U.S.A.
Idaho
Madison
Targhee National Forest: Northwest Slope Big Hole Mountains: logging road between Warm Creek and Carlton Creek, ca 16 air mi W of Driggs.
-111.4136
43.7454
2134
2195
Mostly open slopes dominated by forbs and shrubs (Balsamorhiza, Symphoricarpos, Artemisia), some aspen groves, and Douglas fir.
RM
RM
676716
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
1133
Stuart Markow
1991
6
20
171
U.S.A.
Wyoming
Teton
Targhee National Forest: West Slope Teton Range: Teton Canyon, just N of Teton Canyon Campground, ca 6 mi E of Alta.
-110.9343
43.7634
2134
2225
Mixed open slope and coniferous forest dominated by Pseudotsuga, Prunus, Populus, and Symphoricarpos.
RM
RM
676717
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
2520
Stuart Markow
1991
7
8
189
U.S.A.
Wyoming
Teton
Targhee National Forest: West Slope Teton Range: Coal Creek Trail, ca 9 air mi SE of Victor, Idaho.
-110.9742
43.5186
2195
2378
Coniferous forest bordering creek, dominated by Abies lasiocarpa, Pseudotsuga menziesii, Sorbus, and Salix.
RM
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
536
Stuart Markow
1991
6
14
165
U.S.A.
Idaho
Bonneville
Targhee National Forest: West Slope Big Hole Mountains: Black Canyon, ca 9 air mi from Kelly Canyon Ski Area, adjacent to and N of Snake River.
-111.4192
43.5894
1646
1951
Steep open slope dominated by Juniperus, Cercocarpus, Purshia, Symphoricarpos, and bunchgrasses. Some forested slopes dominated by Pseudotsuga, Physocarpus, Vaccinium, and Lonicera. Some riparian and adjacent open areas.
RM
RM
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
5636
Stuart Markow
1991
8
11
223
U.S.A.
Wyoming
Teton
Targhee National Forest: East Slope Snake River Range: Divide Trail, S of Mosquito Creek Road.
-110.9037
43.428
2012
2195
Roadside and adjacent coniferous forest, dominated by Pinus contorta, Abies lasiocarpa, and Picea engelmannii, with some riparian.
RM
RM
676773
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
664
Stuart Markow
1991
6
16
167
U.S.A.
Wyoming
Teton
Targhee National Forest: West Slope Teton Range: near entrance to Darby Canyon, ca 4 air mi SE of Driggs, Idaho.
-111.0339
43.6914
2012
2256
Open slopes dominated by forbs and shrubs (Amelanchier, Purshia, Symphoricarpos, and Prunus) and open area adjacent to irrigation canal.
RM
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
6673
Stuart Markow
1992
5
30
151
U.S.A.
Idaho
Clark
Targhee National Forest: Western Centennial Mountains: slope above and W of Threemile Creek, ca 15 air mi NNE of Dubois.
-112.126
44.3825
1890
2012
Shrub steppe dominated by Artemisia, Balsamorhiza, and grasses.
RM
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
6748
Stuart Markow
1992
6
1
153
U.S.A.
Idaho
Lemhi
Targhee National Forest: Beaverhead Range: Eidelman Canyon, ca 2 air mi SE of Nicholia.
-112.9635
44.3551
2378
2560
Open slope above canyon dominated by Artemisia and Leucopoa.
RM
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
6975
Stuart Markow
1992
6
5
157
U.S.A.
Idaho
Clark
Targhee National Forest: South Slope Western Centennial Mountains: 300 yds S of Long Creek, 0.5 mi E of National Forest boundary; ca 12 air mi N of Spencer.
-112.2104
44.439
2195
2256
Rolling, open range land, dominated by Artemisia, grasses and forbs.
RM
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
7068
Stuart Markow
1992
6
7
159
U.S.A.
Idaho
Fremont
Targhee National Forest: Henrys Lake Mountains: 0.5 mi SW of Targhee Pass, between Howard Springs and Targhee Creek Trail, ca 9.5 air mi W of West Yellowstone, Montana.
-111.3063
44.6858
2073
2134
Open meadow dominated by Artemisia, grasses, and forbs.
RM
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
7156
Stuart Markow
1992
6
7
159
U.S.A.
Idaho
Fremont
Targhee National Forest: Henrys Lake Mountains: Raynolds Pass, ca 3.5 air mi NW of Henrys Lake; ca 17 air mi NW of West Yellowstone, Montana.
-111.4479
44.715
2073
2103
Sagebrush flat dominated by Artemisia, forbs, and grasses.
RM
RM
665935
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
4374
Amy J. Roderick
1998
6
2
153
U.S.A.
Wyoming
Natrona
Upper North Platte and Laramie River Drainages: Rattlesnake Hills: McDougal Gulch N of Dry Creek or County Road 321, ca 14.8 air mi NW of junction with Wyo Hwy 220.
-107.3175
42.7006
2103
Chalky bluffs dominated by cushion plants. Phenology: flowering.
RM
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
7474
Stuart Markow
1992
6
12
164
U.S.A.
Idaho
Fremont
Targhee National Forest: Island Park Plateau: summit of Bishop Mountain, ca 3 air mi S of Island Park Reservoir.
-111.5462
44.3383
2378
Open meadow dominated by grasses and forbs with scattered Abies lasiocarpa.
RM
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
7519
Stuart Markow
1992
6
12
164
U.S.A.
Idaho
Fremont
Targhee National Forest: Island Park Plateau: Big Springs, ca 8 air mi SE of Henrys Lake, ca 4 air mi E of North Fork Summer Home Area.
-111.2658
44.4957
1951
Flat, open site above flood plain, dominated by forbs and grasses.
RM
RM
676774
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
758
Stuart Markow
1991
6
16
167
U.S.A.
Wyoming
Teton
Targhee National Forest: West Slope Teton Range: near entrance to Darby Canyon, ca 4 air miles SE of Driggs, Idaho.
-111.0538
43.677
2012
2256
Open slopes dominated by forbs and shrubs (Amelanchier, Purshia, Symphoricarpos, Prunus), and open area adjacent to irrigation canal.
RM
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
8107
Stuart Markow
1992
6
22
174
U.S.A.
Idaho
Clark
Targhee National Forest: Western Centennial Mountains: above and W of Modoc Creek, leading to Paul Reservoir, 3 air mi S of National Forest boundary, ca 21 air mi NW of Dubois.
-112.3514
44.4676
2286
2317
Open slopes with mostly forbs and grasses.
RM
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
8388
Stuart Markow
1992
6
28
180
U.S.A.
Idaho
Lemhi
Targhee National Forest: Beaverhead Range: along Willow Creek, ca 2.5 air mi N of Nicholia.
-112.9836
44.3984
2378
Clearing in coniferous forest, dominated by grasses and forbs.
RM
RM
665934
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
4397
Amy J. Roderick
1998
6
3
154
U.S.A.
Wyoming
Natrona
Upper North Platte and Laramie River Drainages: Granite Mountains: ca 1.5 air mi SE from Lone Mountain; ca 19.2 air mi W of junction with Wyo Hwy 220.
-107.4551
42.5549
2073
2103
Sagebrush with granitic outcrops; Selaginella densa common. Phenology: flowering.
RM
RM
667064
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
445
Amy J. Roderick
1997
6
8
159
U.S.A.
Wyoming
Carbon
Upper North Platte and Laramie River Drainages: buttes bordering north edge of the town of Rawlins, ca 1 air mi E of Rawlins Peak.
-107.2451
41.8057
2134
2286
Barren north facing sandstone slope. Phenology: flowering.
RM
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
2073
James P. Vanderhorst
1991
5
23
143
U.S.A.
Colorado
Moffat
Flat Tops/White River Plateau: Hamilton, ca 11 air mi SSW of Craig.
-107.611
40.3636
1951
East-facing slope and ridgetop, with sagebrush, lupine, and grass.
RM
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
2232
James P. Vanderhorst
1991
5
26
146
U.S.A.
Colorado
Garfield
Flat Tops/White River Plateau: Grand Hogback: Burning Mountain, ca 9 air mi ENE of Rifle.
-107.6068
39.6005
2195
Saddle on ridge of hogback, with Amelanchier.
RM
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
2402
James P. Vanderhorst
1991
6
7
158
U.S.A.
Colorado
Routt
[location and coordinates withheld]
2439
Rolling heavy clay hills, with sagebrush, snowberry, balsamroot, and scattered serviceberry.
RM
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
2422
James P. Vanderhorst
1991
6
8
159
U.S.A.
Colorado
Moffat
[location and coordinates withheld]
2134
Ridgetop below mountain and above hayfield, with oak, snowberry, sagebrush, and serviceberry.
RM
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
2450
James P. Vanderhorst
1991
6
8
159
U.S.A.
Colorado
Rio Blanco
[location and coordinates withheld]
2134
North-sloping ridgetop with oak, sagebrush, snowberry, and serviceberry.
RM
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
24489
Ronald L. Hartman James P. Vanderhorst
1990
5
22
142
U.S.A.
Colorado
Garfield
Flat Tops/White River Plateau: Grand Hogback, ca 6 air mi NNW of Rifle.
-107.7949
39.6441
1859
2164
North slope of hogback with Artemisia tridentata slopes grading with Pinus edulis-Juniperus osteosperma and Pinus edulis-Cercocarpus montanus in vicinity of gap; pinyon pine-mountain mahogany.
RM
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
24702
Ronald L. Hartman James P. Vanderhorst and Walter Fertig
1990
5
24
144
U.S.A.
Colorado
Garfield
Flat Tops/White River Plateau: East Slope Grand Hogback: Monument Peak to Harris Reservoir, ca 15 air mi NW of Rifle.
-107.9078
39.7169
2134
2804
Sagebrush-meadow with adjacent sandstone outcrops, aspen woodland, oak slopes, pasture, and squaw apple scrubland; oak slopes and squaw apple scrubland.
RM
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
24766
Ronald L. Hartman James P. Vanderhorst and Walter Fertig
1990
5
25
145
U.S.A.
Colorado
Rio Blanco
Flat Tops/White River Plateau: LO 7 Hill, ca 5 air mi S of Meeker.
-107.9078
39.9642
2073
2256
Oak-sagebrush mosaic; northwest exposure in general.
RM
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
24939
Ronald L. Hartman
1990
5
27
147
U.S.A.
Colorado
Rio Blanco
Flat Tops/White River Plateau: Grand Hogback: ca 10 air mi SSW of Meeker.
-107.9455
39.906
2134
2418
Serviceberry with scattered patches of oak, pinyon-juniper, and sagebrush.
RM
RM
667890
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
38019
B. E. Nelson Beth Ward
1996
6
10
162
U.S.A.
Wyoming
Carbon
South-central Wyoming: Sierra Madre: along the Continental Divide above McCarty Canyon off McCarty Canyon or County Road 503, ca 27 air mi S of Rawlins; ca 29 air mi NE of Baggs.
-107.2984
41.3884
2408
2487
Grassy sagebrush slope. Phenology: flowering.
RM
RM
667894
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
38083
B. E. Nelson Beth Ward
1996
6
10
162
U.S.A.
Wyoming
Carbon
South-central Wyoming: Sierra Madre: above Muddy Creek opposite Pole Gulch on Muddy Creek or BLM Road 3306, ca 27 air mi SSW of Rawlins; ca 27.5 air mi NE of Baggs.
-107.4249
41.4037
2347
2451
Sagebrush-grassland. Phenology: flowering.
RM
RM
665933
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
4522
Amy J. Roderick
1998
6
6
157
U.S.A.
Wyoming
Natrona
Upper North Platte and Laramie River Drainages: E of County Road 407, ca 3 air mi SE of Alcova.
-106.6884
42.5403
1737
1798
Red sandy and calcareous slopes with sagebrush and Utah juniper. Phenology: fruiting.
RM
RM
667892
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
1015
Beth Ward
1996
6
20
172
U.S.A.
Wyoming
Carbon
South-central Wyoming: draws leading from the southwest into Loco Creek drainage at the confluence of West Fork Loco and Loco creeks, ca 13 air mi ENE of Baggs.
-107.4315
41.1419
2207
2390
Flat above draw, rocky. Phenology: flowering & fruiting.
RM
RM
667893
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
1110
Beth Ward
1996
6
20
172
U.S.A.
Wyoming
Carbon
[location and coordinates withheld]
2088
2201
Drier slopes. Phenology: flowering & fruiting.
RM
RM
667888
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
1435
Beth Ward
1996
6
24
176
U.S.A.
Wyoming
Fremont
South-central Wyoming: southeastern end of Pacific Butte, ca 31.5 air mi NE of Farson.
-108.876
42.3162
2312
2332
North-facing draw. Phenology: flowering & fruiting.
RM
RM
667889
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
2408
Beth Ward
1996
7
11
193
U.S.A.
Wyoming
Sweetwater
South-central Wyoming: southwestern extent of Joe Hay Rim, ca 6.5 air mi S of Oregon Buttes; ca 40 air mi NNE of Rock Springs.
-108.876
42.1405
2304
2373
Moist draw. Phenology: fruiting.
RM
RM
667891
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
948
Beth Ward
1996
6
20
172
U.S.A.
Wyoming
Carbon
[location and coordinates withheld]
2353
2390
Rocky flat above draw. Phenology: flowering & fruiting.
RM
667887
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
980
Beth Ward
1996
6
20
172
U.S.A.
Wyoming
Carbon
[location and coordinates withheld]
2219
2344
Flat above draw. Phenology: flowering & fruiting.
RM
RM
667895
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
54203
Ronald L. Hartman Beth Ward
1996
6
1
153
U.S.A.
Wyoming
Carbon
South-central Wyoming: ca 2.5 air mi E of Savery.
-107.3935
41.026
2057
2088
Sagebrush-juniper slopes, south exposure with sandy/rocky soil. Phenology: flowering.
RM
RM
672613
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
4232
Beth Ward
1997
5
27
147
U.S.A.
Wyoming
Sweetwater
South-Central Wyoming: Green River Basin: low ridges on drainage from Richards Mountain, ca 3 air mi E of Minnies Gap; ca 39 air mi SSW of Rock Springs.
-109.3788
41.0063
1993
2027
Rock outcrop. Phenology: flowering.
RM
RM
672616
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
4504
Beth Ward
1997
6
3
154
U.S.A.
Wyoming
Sweetwater
South-Central Wyoming: Green River Basin: north-facing slopes on Gooseberry Creek, ca 2.5 air mi above the confluence of Gooseberry and Trout creeks; ca 30 air mi SSW of Rock Springs.
-109.2258
41.165
2268
2426
Sagebrush near creek. Phenology: flowering & fruiting.
RM
RM
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
112
Heather Bradtke
2001
6
10
161
U.S.A.
Oregon
Umatilla
Umatilla National Forest and Vicinity: near lookout at Ruckel Junction.
-118.132861
45.628694
1371
Open area near Douglas fir/tamarack forest; soil of interspresed areas with shallow "ruddy" soil, rock, and "biscuit" areas of deeper soil; slope 0-15; aspect ridgetop and west. Phenology: flowering.
RM
RM
672706
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
5791
Beth Ward
1997
6
20
171
U.S.A.
Wyoming
Sweetwater
South-Central Wyoming: west slopes and draws of Oregon Buttes at the southern end, ca 10 air mi SE of Wyo Hwy 28; ca 29 air mi ENE of Farson.
-108.876
42.2284
2286
2420
Gradual sagebrush slope. Phenology: flowering & fruiting.
RM
RM
672615
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
5844
Beth Ward
1997
6
20
171
U.S.A.
Wyoming
Sweetwater
South-Central Wyoming: draws and slopes and creek bottom of Alkali Wash, ca 6 air mi SW of Oregon Buttes; ca 25.5 air mi ENE of Farson.
-108.9538
42.2137
2182
2233
Sagebrush slope. Phenology: flowering & fruiting.
RM
RM
665932
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
4585
Amy J. Roderick
1998
6
7
158
U.S.A.
Wyoming
Carbon
Upper North Platte and Laramie River Drainages: Canyon Creek E of Kortes or County Road 291, ca 11.2 air mi S of Alcova townsite.
-106.7344
42.3975
1981
Sagebrush knoll with rock outcrops; Ribes cereum var. pedicellare common. Phenology: flowering.
RM
RM
672614
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
6059
Beth Ward
1997
6
22
173
U.S.A.
Wyoming
Sweetwater
South-Central Wyoming: Rock Springs Uplift: lower elevation draws and slopes from Miller Mountain to the S, ca 2 air mi E of U.S. Hwy 191; ca 29.5 air mi SSE of Rock Springs.
-109.1302
41.1505
2335
2384
Sandy slope. Phenology: flowering & fruiting.
RM
RM
960439
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
757
Roger L. Williams
1989
5
21
141
U.S.A.
Wyoming
Carbon
Sierra Madre: West Cottonwood Creek, ca 2 air mi W of Encampment.
-106.8303
41.209
2347
Dry bank near creek. Few plants; flowers white. Phenology: flowering.
RM
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
1054
Jean Wood
1995
6
7
158
U.S.A.
Washington
Stevens
Western Colville National Forest and Vicinity: Columbia River: China Bend: along north shore of river, ca 9 air mi SW of Northport.
-117.8727
48.8256
396
548
Riverside and cliffs. Phenology: fruiting.
RM
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
1105
Jean Wood
1995
6
9
160
U.S.A.
Washington
Ferry
Western Colville National Forest and Vicinity: White Mountain, ca 8 air mi W of Danville along Forest Road 2113 to Forest Road 800.
-118.6903
48.9792
1402
1676
Southwest facing steppe slopes with scattered Douglas fir and pinegrass; somewhat disturbed by cows with localized weed infestations. Phenology: flowering.
RM
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
1174
Jean Wood
1995
6
9
160
U.S.A.
Washington
Ferry
Western Colville National Forest and Vicinity: Lone Ranch Creek areaon west side of Kettle Crest, ca 3 air mi ESE of Danville; along Forest Road 9576 to Forest Road 400.
-118.4275
48.9506
1341
1463
Steep steppe; edges of Douglas fir/pinegrass. Phenology: flowering.
RM
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
1355
Jean Wood
1995
6
24
175
U.S.A.
Washington
Stevens
Western Colville National Forest and Vicinity: Old Dominion Mountain, ca 7 air mi NE of Colville along Forest Road 130.
-117.7465
48.5761
1760
Talus, subalpine fir forest, pinegrass; Douglas fir slopes with rock outcrops; roadside; north and west to southwest exposure. Phenology: flowering.
RM
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
1506
Jean Wood
1995
6
27
178
U.S.A.
Washington
Stevens
Western Colville National Forest and Vicinity: Meadow Creek Drainage: Ione Hill, ca 5 air mi S of Spirit along Forest Road 1728.
-117.64
48.7503
1006
Rocky and open hill tops and south slopes; ponderosa pine/pinegrass and Douglas fir. Phenology: flowering & fruiting.
RM
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
1624
Jean Wood
1995
6
29
180
U.S.A.
Washington
Stevens
Western Colville National Forest and Vicinity: Dry Creek Ridge, ca 8 air mi W of Chewelah, SW of Dry Creek Road.
-117.833
48.2866
701
884
Mixed Douglas fir forest with rocky ridge and outcrops; small lake, some parts heavily logged; some open field with wet areas. Phenology: fruiting.
RM
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
1763
Jean Wood
1995
7
1
182
U.S.A.
Washington
Stevens
Western Colville National Forest and Vicinity: Kettle River: First Thought Mountain, ca 2 air mi NE of Orient along Forest Road 4149.
-118.1647
48.8933
1189
Rocky, bald mountain top with scattered Douglas fir and edges of warm mixed forest. Phenology: fruiting.
RM
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
179
Jean Wood
1995
5
21
141
U.S.A.
Washington
Stevens
Western Colville National Forest and Vicinity: east side of Columbia River, ca 2.5 air mi E of Daisy at the base of Gold Hill, ca 0.5 mi E of junction of Breckenridge Road and Beck Road.
-118.1144
48.359
823
West facing bench with small rocky outcrop and small seasonal creek; ponderosa pine and Douglas fir/nineback, with birch and aspen in wetter area. Phenology: flowering.
RM
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
1842
Jean Wood
1995
7
1
182
U.S.A.
Washington
Stevens
Western Colville National Forest and Vicinity: Flat Creek drainage NW of Elbow Lake, ca 10 air mi NE of Orient; along Forest Road 460 from Forest Road 15.
-118.0114
48.9506
1067
1219
Rock outcrops with south and east exposure; open areas surrounded by cool Douglas fir forest. Phenology: fruiting.
RM
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
2025
Jean Wood
1995
7
5
186
U.S.A.
Washington
Ferry
Western Colville National Forest and Vicinity: Kettle Range: Kettle River Drainage: east end of Grouse Mountain, ca 5 air mi NNW of Orient along Forest Road 150.
-118.2523
48.9363
1067
1219
Mixed forest of cedar/spruce/subalpine fir; south facing rock outcrops and clearings with Douglas fir and pinegrass. Phenology: flowering & fruiting.
RM
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
2128
Jean Wood
1995
7
5
186
U.S.A.
Washington
Ferry
Western Colville National Forest and Vicinity: Kettle Range: east end of Taylor Ridge, ca 8 air mi SW of Orient along Forest Road 6113.
-118.3399
48.7931
1432
1646
Mixed forest with ponderosa pine on south slope; heavily trashed by cows. Phenology: flowering.
RM
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
219
Jean Wood
1995
5
21
141
U.S.A.
Washington
Stevens
Western Colville National Forest and Vicinity: east side of Columbia River, ca 2.5 air mi E of Daisy at the base of Gold Hill, ca 0.5 mi E of junction of Breckenridge Road and Beck Road.
-118.1144
48.359
823
West facing bench with small rocky outcrop and small seasonal creek; ponderosa pine and Douglas fir/nineback, with birch and aspen in wetter area. Phenology: flowering.
RM
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
238
Jean Wood
1995
5
23
143
U.S.A.
Washington
Stevens
Western Colville National Forest and Vicinity: Little Pend Oreille National Wildlife Refuge: Little Pend Oreille River, ca 10 air mi SE of Colville; ca 1 air mi N of Winslow Lake and 1 air mi E of Starvation Lake.
-117.6815
48.4893
792
Bench and slopes along road; ponderosa pine/pinegrass; sand/silt/gravel; southern exposure. Phenology: flowering.
RM
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
2559
Jean Wood
1995
7
23
204
U.S.A.
Washington
Ferry
Western Colville National Forest and Vicinity: Sherman Peak on Kettle Crest, ca 12 air mi ESE of Republic; Sherman Peak Loop Trail from Wash Hwy 20 at Sherman Pass.
-118.488
48.6051
1707
2073
Open slopes with granite outcrops, rocky ridge with talus; small lake with boggy area; mixed forest with subalpine fir, lodgepole pine, and larch. Phenology: flowering & fruiting.
RM
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
2769
Jean Wood
1995
8
4
216
U.S.A.
Washington
Stevens
Western Colville National Forest and Vicinity: Calispell Peak, ca 18 air mi ESE of Colville above Forest Road 290.
-117.5084
48.4314
1707
2089
High sagebrush balds on east and south aspects; lodgepole pine, larch, and subalpine fir. Phenology: fruiting.
RM
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
295
Jean Wood
1995
5
24
144
U.S.A.
Washington
Stevens
Western Colville National Forest and Vicinity: Iron Mountains: High Lake, ca 1 1/4 air mi ESE of Addy; spur road from Forest Road 9535.
-117.8114
48.3445
1036
Hillside and rocky outcrops around lake, mostly south facing; south and west side of lake is a 10 year old clearcut; east side of lake is rock outcrops with undisturbed scattered ponderosa pine. Phenology: flowering.
RM
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
3247
Jean Wood
1995
8
10
222
U.S.A.
Washington
Ferry
Western Colville National Forest and Vicinity: Kettle Crest Trail and Old Stage Road, ca 6 air mi N of Sherman Pass; from trailhead on Albion Hill Road.
-118.4713
48.7359
1646
1977
South aspect sagebrush balds with scattered large Douglas fir; subalpine fir/lodgepole pine forest with large 1 year-old burn areas. Phenology: fruiting.
RM
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
3320
Jean Wood
1995
8
12
224
U.S.A.
Washington
Ferry
Western Colville National Forest and Vicinity: Kettle Crest: north end of Kettle Crest Trail, ca 9 air mi SE of Curlew.
-118.4056
48.8647
1432
1646
Rock outcrops with small seeps, south facing open area; mixed forest with mature ponderosa pine/larch; lodgepole pine/subalpine fir at higher elevations. Phenology: fruiting.
RM
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
373
Jean Wood
1995
5
26
146
U.S.A.
Washington
Ferry
Western Colville National Forest and Vicinity: Sanpoil River Drainage: ca 6 air mi S of Republic; along Forest Road 2053 ca 1/8 mi S of junction with Forest Road 500.
-118.7057
48.5614
1097
West side of road onto Talinum bald/rock outcrops; sparse ponderosa pine, fingers of mixed trees/pinegrass; east, south, and west exposure. Phenology: flowering.
RM
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
440
Jean Wood
1995
5
28
148
U.S.A.
Washington
Ferry
Western Colville National Forest and Vicinity: Storm King Mountain area, ca 6 air mi NW of Republic; beside Forest Road 514 ca 1 1/4 mi SW of junction with Forest Road 2086.
-118.8218
48.7359
1448
Open south/southeast facing slopes and rock outcrops on west side of road; edge of mixed forest, Douglas fir/subalpine fir/pinegrass. Phenology: flowering.
RM
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
495
Jean Wood
1995
5
28
148
U.S.A.
Washington
Ferry
Western Colville National Forest and Vicinity: Tonata Creek, ca 8 air mi W of Curlew; N of Forest Road 2148 ca 1.0 mi W of junction with Forest Road 2149.
-118.778
48.8647
1067
1371
Open/steep, heavily grazed slopes with large scattered ponderosa pine/pinegrass, small rock outcrops, edge of mixed woods; severe infestations of mullein, thistle and cheat grass. Phenology: flowering.
RM
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
540
Jean Wood
1995
5
30
150
U.S.A.
Washington
Stevens
Western Colville National Forest and Vicinity: Little Pend Oreille National Wildlife Refuge: overlook to Bayley Lake, ca 10 air mi N of Chewelah.
-117.6599
48.4169
945
East exposure cliff edge with rock, edges of mixed forest - Douglas fir/ninebark/pinegrass, occasional ponderosa pine. Phenology: flowering.
RM
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
643
Jean Wood
1995
5
30
150
U.S.A.
Washington
Stevens
Western Colville National Forest and Vicinity: Quartzite Mountain, ca 2.5 air mi E of Chewelah on Mud Lake Road; ca 0.5 mi S of Mud Lake.
-117.6599
48.2721
823
1128
Steep south/southwest facing slopes with rock outcrops; ponderosa pine/pinegrass, Douglas fir/ninebark. Phenology: flowering.
RM
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
683
Jean Wood
1995
6
1
152
U.S.A.
Washington
Stevens
Western Colville National Forest and Vicinity: Little Pend Oreille Wildlife Refuge: Lake Mountain, ca 1 air mi E of Lake Thomas; ca 20 air mi ENE of Colville; ca 3 mi along Forest Road 2712.
-117.5084
48.634
1219
Rock outcrop at summit. Phenology: flowering.
RM
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
789
Jean Wood
1995
6
3
154
U.S.A.
Washington
Ferry
Western Colville National Forest and Vicinity: Swan Butte, ca 11 air mi SSW of Republic; south end of Swan Butte; NE of Forest Road 5314.
-118.8363
48.5032
1158
1189
Douglas fir/pinegrass mixed forest; rock outcrops. Phenology: flowering.
RM
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
886
Jean Wood
1995
6
5
156
U.S.A.
Washington
Stevens
Western Colville National Forest and Vicinity: Little Round Top Mountain: Middle Fork Mill Creek, ca 9 road mi NE of Colville on Aladdin Route.
-117.7465
48.6196
701
1006
Cedar at creekside; mixed Douglas fir forest, and aspen groves on lower slopes; Douglas fir, ponderosa pine and larch with pinegrass and ninebark on upper slopes; rock outcrops of shale/slate. Phenology: fruiting.
RM
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
93
Jean Wood
1995
5
20
140
U.S.A.
Washington
Ferry
Western Colville National Forest and Vicinity: Sherman Creek Wildlife Recreation Area: along Sherman Creek, ca 4 air mi WSW of Kettle Falls; toward Inchelium along Wash Hwy 3; ca 0.5 mi S of junction of Wash hwys 3 and 20.
-118.1576
48.5906
518
548
Flat benches on both sides of road, gravel bank of road cut west/northeast exposure, ravine of creek; ponderosa pine flats, gravel pit, disturbed roadside, mixed forest creekside. Phenology: flowering.
RM
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
3883
Jean Wood
1996
5
20
141
U.S.A.
Washington
Ferry
Western Colville National Forest and Vicinity: French Point, west bank of Columbia River, ca 10 air mi SW of Kettle Falls.
-118.1793
48.5037
396
Ponderosa pine/pinegrass open forest to riverbank and rocky islands. Phenology: flowering.
RM
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
3935
Jean Wood
1996
5
20
141
U.S.A.
Washington
Ferry
Western Colville National Forest and Vicinity: Kettle River Campground, ca 0.5 air mi E of Boyds on the west bank of Kettle River.
-118.1428
48.7215
402
Open ponderosa pine/pinegrass, mixed forest edge, riverbank, seasonally flooded inlets, and rock outcrops. Phenology: flowering.
RM
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
3996
Jean Wood
1996
5
22
143
U.S.A.
Washington
Stevens
Western Colville National Forest and Vicinity: Bear Creek, west side of Columbia River, ca 1.5 air mi W of Northport. Private land owned by Bear Creek Nursery.
-117.6828
48.9935
548
609
Mixed woods and shrublands with limestone outcrops overlooking the river. Phenology: flowering.
RM
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
4130
Jean Wood
1996
5
25
146
U.S.A.
Washington
Stevens
Western Colville National Forest and Vicinity: Indian Creek on west side of Iron Mountains, ca 2 air mi NE of Addy.
-117.833
48.3879
1036
1158
Open ponderosa pine forest with scattered Douglas fir, pinegrass; rock outcrops on mostly southern aspect. Phenology: flowering.
RM
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
4149
Jean Wood
1996
5
25
146
U.S.A.
Washington
Stevens
[location and coordinates withheld]
609
670
Quartzite cliffs, talus slopes, rim, and forested base; mixed forest of Douglas fir and lodgepole pine; scattered ponderosa pine on rim. Phenology: flowering.
RM
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
4254
Jean Wood
1996
5
27
148
U.S.A.
Washington
Stevens
Western Colville National Forest and Vicinity: Cliff Ridge on the southern boundary of the Little Pend Oreille Wildlife Refuge.
-117.6599
48.4169
914
1158
Ridge of bunchgrass steppe surrounded by mixed forest and interspersed with Douglas fir. Exotics invading, but small areas still primarily native vegetation. Phenology: flowering.
RM
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
4318
Jean Wood Kathy Ahlenslager
1996
5
29
150
U.S.A.
Washington
Stevens
Western Colville National Forest and Vicinity: southern tip of Kamloops Island at the mouth of Kettle River, ca 3.5 road mi N of Barneys Junction on U.S. Hwy 395, S of Flat Creek Road.
-118.1209
48.6786
396
Open ponderosa pine forest, riverbank and draw-down mud. Phenology: flowering.
RM
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
4433
Jean Wood Jack Nisbet
1996
6
1
153
U.S.A.
Washington
Stevens
Western Colville National Forest and Vicinity: mouth of Colville River, north bank below bridge on Wash Hwy 25, ca 3 mi S of Kettle Falls.
-118.0927
48.5761
396
Riverbank, flood area, and bordering ponderosa pine forest. Phenology: flowering.
RM
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
4455
Jean Wood
1996
6
2
154
U.S.A.
Washington
Stevens
Western Colville National Forest and Vicinity: Little Pend Oreille Wildlife Refuge: Blacktail Mountain, ca 15 air mi ESE of Colville.
-117.6166
48.4748
975
1128
Mixed forest and bald outcrops with scattered granite boulders on southern exposure. Phenology: flowering.
RM
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
4596
Jean Wood Sylvia Brock
1996
6
4
156
U.S.A.
Washington
Stevens
Western Colville National Forest and Vicinity: tramway region of Huckleberry Creek drainage, ca 3 air mi NW of Waitts Lake; ca 7 air mi SW of Chewelah.
-117.8547
48.2287
731
914
Rock outcrops and bald ridges with occasional large Douglas fir and ponderosa pine; mixed woods in draws. Phenology: flowering & fruiting.
RM
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
4664
Jean Wood
1996
6
6
158
U.S.A.
Washington
Ferry
Western Colville National Forest and Vicinity: Hoodoo Canyon Trail to Emerald Lake from Deadman Creek, ca 10 air mi W of Kettle Falls.
-118.2742
48.6643
792
1158
Lake shore; trailside through mixed forest to north facing balds, rock outcrops, and cliffs with scattered ponderosa pine, Douglas fir, and pinegrass; small seeps. Phenology: flowering.
RM
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
4834
Jean Wood
1996
6
15
167
U.S.A.
Washington
Stevens
Western Colville National Forest and Vicinity: south end of Old Douglas Mountain.
-117.8763
48.6196
579
975
Cliffs and talus slopes with mixed forest at base; scattered large ponderosa pine and Douglas fir on higher south facing slopes. Phenology: fruiting.
RM
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
4951
Jean Wood
1996
6
23
175
U.S.A.
Washington
Stevens
Western Colville National Forest and Vicinity: Little Pend Oreille Wildlife Refuge, ca 6 air mi SE of Colville; access from Buffalo-Wilson Road.
-117.7681
48.4603
701
762
Rolling terrain with ponderosa pine and smaller Douglas fir encroaching. Phenology: flowering & fruiting.
RM
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
5183
Jean Wood
1996
6
27
179
U.S.A.
Washington
Ferry
Western Colville National Forest and Vicinity: Little Vulcan Mountain, ca 3.5 air mi W of Curlew.
-118.6684
48.9935
1036
1274
South facing slopes and ravines; scattered forest interspersed with steppe and rock outcrops. Phenology: flowering.
RM
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
5373
Jean Wood
1996
6
30
182
U.S.A.
Washington
Ferry
Western Colville National Forest and Vicinity: west of the Kettle River, ca 2.5 air mi SW of Danville.
-118.537
48.9649
762
975
West and south facing slopes with rock outcrops and scattered ponderosa pines. Open areas heavily infested with knapweed, cheatgrass, and goatweed. Phenology: fruiting.
RM
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
5608
Jean Wood
1996
6
30
182
U.S.A.
Washington
Ferry
Western Colville National Forest and Vicinity: White Creek above Kettle River, ca 2.5 air mi NE of Curlew.
-118.5589
48.9219
670
792
Open south and west facing slopes. Phenology: fruiting.
RM
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
5688
Jean Wood
1996
7
2
184
U.S.A.
Washington
Ferry
Western Colville National Forest and Vicinity: Lake Ellen, ca 16 air mi WSW of Colville.
-118.2486
48.5032
670
731
Mountainside above east end of lake and campground; granite balds with fingers of mixed forest. Phenology: fruiting.
RM
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
5870
Jean Wood
1996
7
4
186
U.S.A.
Washington
Stevens
Western Colville National Forest and Vicinity: Flagstaff Mountain, ca 3 air mi SW of Northport.
-117.858
48.8933
975
1097
South facing mountainside below barite mine; open steppe with scattered brush and occasional ponderosa pine and Douglas fir. Phenology: fruiting.
RM
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
6191
Jean Wood
1996
7
23
205
U.S.A.
Washington
Stevens
Western Colville National Forest and Vicinity: Fifteenmile Creek, ca 17 air mi N of Kettle Falls.
-118.0333
48.8647
823
1097
Mixed conifer forest and small creek; balds and open ridges. Phenology: fruiting.
RM
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
6515
Jean Wood
1996
7
25
207
U.S.A.
Washington
Ferry
Western Colville National Forest and Vicinity: Lambert Creek, ca 9 air mi NE of Republic.
-118.537
48.7215
1158
1432
Open slopes and rocky balds. Phenology: fruiting.
RM
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
6894
Jean Wood Diane Pavek
1996
8
3
216
U.S.A.
Washington
Ferry
Western Colville National Forest and Vicinity: White Mountain on Kettle Crest Trail, ca 7 air mi S of Sherman Pass.
-118.4227
48.5032
1554
2103
Trail through burn (1988) and upland meadows and slopes with fellfields and talus; scattered Douglas fir and subalpine fir. Phenology: fruiting.
RM
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
7185
Jean Wood
1996
8
5
218
U.S.A.
Washington
Ferry
Western Colville National Forest and Vicinity: Graves Mountain, ca 16 air mi WNW of Kettle Falls.
-118.3792
48.6342
1219
1798
Mixed forest, rock outcrops, and east and south slopes of mountaintop. Phenology: flowering & fruiting.
RM
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
7226
Jean Wood
1996
8
7
220
U.S.A.
Washington
Stevens
Western Colville National Forest and Vicinity: Sherlock Peak, ca 5 air mi W of Metaline Falls.
-117.5074
48.8664
1890
1940
Open ridgetop with scattered Pinus contorta and Abies lasiocarpa; rock outcrops. Phenology: fruiting.
RM
RM
665931
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
4678
Amy J. Roderick
1998
6
10
161
U.S.A.
Wyoming
Natrona
[location and coordinates withheld]
1707
1737
Gravelly sagebrush slope; Artemisia pedatifida and Atriplex confertifolia common. Phenology: fruiting.
RM
RM
665930
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
4765
Amy J. Roderick
1998
6
10
161
U.S.A.
Wyoming
Natrona
Upper North Platte and Laramie River Drainages: Ryan Hill W of Oregon Trail or County Road 319, ca 9.5 air mi NW of Alcova townsite.
-106.8064
42.6715
1951
1981
Sandy-gravelly roadside. Phenology: flowering.
RM
RM
614703
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
26771
B. E. Nelson Russ Nelson
1993
6
28
179
U.S.A.
Wyoming
Sublette
Upper Green River Basin: Cretaceous Mountain/Hogsback Ridge area: lower end of Wildcat Canyon, ca 3 air mi WSW of Clara Birds Nipple (Bird Nipple); ca 15.5 air mi SSW of Big Piney.
-110.2553
42.3408
2179
Red, gray, and brown badlands. Phenology: fruiting.
RM
RM
614396
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
37023
Ronald L. Hartman
1993
5
16
136
U.S.A.
Wyoming
Sublette
Upper Green River Basin: Cretaceous Mountain/Hogsback Ridge area: 2 air mi NNW of Calpet.
-110.275
42.3117
2164
2189
Benches with sandstone outcrops and sandy slopes. Phenology: flowering.
RM
RM
614702
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
37947
Ronald L. Hartman
1993
5
26
146
U.S.A.
Wyoming
Sublette
Upper Green River Basin: Cretaceous Mountain/Hogsback Ridge area: ca 11 air mi W of junction U.S. Hwy 189 and Wyo Hwy 235.
-110.3439
42.47
2365
2426
Sandstone caprock and sandy slopes. Phenology: flowering.
RM
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
43693
Ronald L. Hartman
1993
8
4
216
U.S.A.
Wyoming
Sublette
Upper Green River Basin: Cretaceous Mountain/Hogsback Ridge Area: ca 0.5 air mi S of southern end of Cretaceous Mountain, ca 14 air mi SW of Big Piney.
-110.316111
42.389722
2469
2500
Hilltop with sagebrush slopes and semi-barren areas on ridges. Phenology: fruiting.
RM
RM
665929
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
4801
Amy J. Roderick
1998
6
11
162
U.S.A.
Wyoming
Natrona
Upper North Platte and Laramie River Drainages: Rattlesnake Hills: ca 4.9 air mi N of Oregon Trail or County Road 319, ca 13.7 air mi NW of Alcova townsite.
-106.9047
42.7006
2073
2097
North-facing gravelly slope of sagebrush, snowberry, and grasses. Phenology: flowering & fruiting.
RM
RM
661628
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
10032
B. E. Nelson
1983
6
27
178
U.S.A.
Wyoming
Hot Springs
Bighorn Basin: along Left Hand Creek, ca 3 air mi SW of Dickie (LU Ranch); ca 38 air mi NW of Thermopolis.
-108.7994
43.9839
1829
Limber pine woods on ridge top.
RM
RM
560019
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
11218
B. E. Nelson
1984
7
4
186
U.S.A.
Wyoming
Hot Springs
Southeastern Absarokas: Castle Rocks and vicinity in North Fork Owl Creek drainage, ca 43 air mi WNW of Thermopolis.
-109.0436
43.7519
2591
2743
Meadow. Phenology: flowering.
RM
RM
297998
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
1261
B. E. Nelson
1985
7
18
199
U.S.A.
Wyoming
Park
Northern Absarokas: "Battleship Mountain", ca 2.5 air mi NW of Dead Indian Pass, ca 24.3 air mi NW of Cody.
-109.4322
44.7594
2164
2195
Frequent in clay in moist meadow with Juncus, Carex, and Trifolium. Phenology: flowering & fruiting.
RM
RM
537152
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
12647
B. E. Nelson Ronald L. Hartman
1985
7
20
201
U.S.A.
Wyoming
Park
Northern Absarokas: on ridge ca 3 air mi NW of Hunter Peak, ca 41 air mi NW of Cody.
-109.7183
44.8928
2530
Disturbed areas in meadow. Phenology: flowering & fruiting.
RM
RM
317527
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
1493
B. E. Nelson
1978
5
30
150
U.S.A.
Wyoming
Platte
Southern Powder River Basin/Southeastern Plains: Southeastern Plains: ca 10 air mi NE of Wheatland on county road at Little Cottonwood Draw, E of Missouri Basin Power Station.
-104.7806
42.1119
1448
Frequent in stony, sandy clay on mountain mahogany-grassy hillside with Erysimum, Opuntia, and Zigadenus. Phenology: flowering.
RM
RM
317528
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
1523
B. E. Nelson
1978
5
31
151
U.S.A.
Wyoming
Platte
Southern Powder River Basin/Southeastern Plains: Southeastern Plains: ca 8.5 air mi N of Guernsey, ca 5 air mi N of Hartville on Wyo Hwy 270, at the head of Webb Canyon.
-104.7047
42.3847
1585
Common in clay loam in upland grassland with Senecio integerrimus, Leucocrinum montanum, and Mertensia lanceolata. Phenology: flowering.
RM
RM
537151
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
15447
B. E. Nelson Erik Nelson
1988
6
7
159
U.S.A.
Wyoming
Park
Northern Absarokas: above Dead Indian Creek below Dead Indian Hill, ca 24 air mi NW of Cody.
-109.392
44.7742
1859
Sagebrush grassland. Phenology: flowering.
RM
RM
537153
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
15505
B. E. Nelson Erik Nelson
1988
6
7
159
U.S.A.
Wyoming
Park
Northern Absarokas: tributary of Camp Creek above Clarks Fork Yellowstone River, ca 1 mi NW of Sugarloaf Mountain, ca 30.5 air mi NW of Cody.
-109.4914
44.83333
2103
Stony meadow. Phenology: flowering.
RM
RM
317742
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
1573
B. E. Nelson
1978
6
1
152
U.S.A.
Wyoming
Niobrara
Southern Powder River Basin/Southeastern Plains: Southern Powder River Basin: ca 12.5 air mi WNW of Manville, ca 20.5 air mi WNW of Lusk.
-104.8359
42.8525
1631
In loamy clay of upland grassland with Besseya wyomingensis, Lithospermum incisum, and Poa. Common. Phenology: flowering.
RM
RM
317743
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
1647
B. E. Nelson
1978
6
5
156
U.S.A.
Wyoming
Goshen
Southern Powder River Basin/Southeastern Plains: Southeastern Plains: ca 29.5 air mi S of Torrington, ca 3.5 air mi W of La Grange on Wyo Hwy 151.
-104.232
41.6431
1402
In clay in upland grassland with Allium textile, Lappula redowskii, and Phlox andicola. Common. Phenology: flowering.
RM
RM
961952
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
22060
B. E. Nelson Linda Shoemaker
1992
5
21
142
U.S.A.
Wyoming
Albany
Medicine Bow Mountains: Red Mountain and vicinity: flats NNE of Red Mountain; ca 27 air mi SW of Laramie.
-105.9278
41.0233
2378
Phenology: flowering.
RM
RM
961953
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
22582
B. E. Nelson
1992
6
24
176
U.S.A.
Wyoming
Albany
Medicine Bow Mountains: Red Mountain and vicinity: ridge ca 1 air mi E of Red Mountain summit, ca 27 air mi SW of Laramie.
-105.9086
41.0086
2439
2560
Stony grassland slopes.
RM
RM
333854
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
2709
B. E. Nelson
1979
5
27
147
U.S.A.
Wyoming
Johnson
Powder River Basin: ca 19 air mi NNE of Linch, ca 28.5 air mi NE of Kaycee, above Big Willow Creek on Iragaray Ranch.
-106.11917
43.8731
1371
Common on west aspect of upland grassland in sandy clay with Carex and Artemisia pedafida. Phenology: flowering.
RM
RM
296001
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
485
B. E. Nelson
1973
6
13
164
U.S.A.
Wyoming
Albany
Medicine Bow Mountains: northwest corner of Sheep Mountain along Wyo Hwy 11, 1.9 mi SW of Wyo Hwy 130.
-106.0582
41.2823
2378
Common in red sandy soil with Cercocarpus, Allium and grass. Phenology: flowering.
RM
RM
350377
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
5304
B. E. Nelson
1980
6
10
162
U.S.A.
Wyoming
Big Horn
Big Horn Mountains: Cottonwood Canyon, ca 18 air mi E of Lovell.
-108.035
44.86139
1920
Rocky, bushy slopes. Phenology: flowering & fruiting.
RM
RM
350375
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
5502
B. E. Nelson
1980
6
12
164
U.S.A.
Wyoming
Big Horn
Big Horn Mountains: Five Springs Campground below Five Springs Falls; ca 21 air mi E of Lovell.
-107.9744
44.80389
2012
Rocky, brushy canyon bottom. Phenology: flowering & fruiting.
RM
RM
350374
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
5596
B. E. Nelson
1980
6
16
168
U.S.A.
Wyoming
Johnson
Big Horn Mountains: along U.S. Hwy 16, ca 8 air mi WSW of Buffalo.
-106.8717
44.3317
2042
Mountain slopes and meadows. Phenology: flowering & fruiting.
RM
RM
350373
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
5653
B. E. Nelson
1980
6
16
168
U.S.A.
Wyoming
Washakie
Big Horn Mountains: along old U.S. Hwy 16 in Tensleep Canyon, ca 11 air mi NE of Ten Sleep.
-107.26111
44.1156
2225
Sagebrush and stony slopes. Phenology: flowering.
RM
RM
350376
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
6630
B. E. Nelson
1980
7
17
199
U.S.A.
Wyoming
Big Horn
Big Horn Mountains: ca 3 air mi SW of Snowshoe Pass, ca 13 air mi ESE of Shell, ca 26.5 air mi E of Greybull.
-107.5322
44.4847
2621
Grassy slopes and flats. Phenology: flowering & fruiting.
RM
RM
665921
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
4927
Amy J. Roderick Frank Blomquist
1998
6
15
166
U.S.A.
Wyoming
Carbon
Upper North Platte and Laramie River Drainages: Seminoe Mountains: School Creek, ca 1.7 air mi NW of Bradley Peak; ca 5.2 air mi E of Ferris townsite.
-107.0849
42.1807
2195
2225
Sagebrush-grasslands; flats and hillside bordering seep. Phenology: fruiting.
RM
RM
661630
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
9453
B. E. Nelson
1983
6
17
168
U.S.A.
Wyoming
Hot Springs
Bighorn Basin: above Buffalo Creek on the road to Little Buffalo Basin, ca 5 air mi N of Dickie, ca 40 air mi NW of Thermopolis.
-108.74
44.0722
1829
Clay and sandy clay ridgetop in rough breaks.
RM
RM
560021
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
9600
B. E. Nelson
1983
6
19
170
U.S.A.
Wyoming
Park
Absaroka Mountains: on ridge ca 1.5 air mi SW of Leon Bairds Peak, ca 2 air mi SSE of Soapy Dale Peak, ca 16.5 air mi SSW of Meeteetse.
-108.94194
43.92611
2286
Rocky ridge with scattered limber pine. Phenology: flowering & fruiting.
RM
RM
560020
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
9690
B. E. Nelson
1983
6
21
172
U.S.A.
Wyoming
Park
Absaroka Mountains: Meeteetse Rim and Meeteetse Creek, ca 2 mi E of Carter Mountain, ca 17.5 air mi S of Cody, ca 12.7 air mi NW of Meeteetse.
-109.12583
44.2628
2286
Grassland on top of rim. Phenology: flowering.
RM
RM
661629
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
9744
B. E. Nelson Ronald L. Hartman
1983
6
21
172
U.S.A.
Wyoming
Park
Bighorn Basin: along Spring Creek, ca 2 air mi W of Meeteetse.
-108.90472
44.16083
1798
RM
RM
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
70825
Ronald L. Hartman Heather Bradtke
2001
6
6
157
U.S.A.
Oregon
Grant
Umatilla National Forest and Vicinity: Spring Creek, Forest Road 1010.030, ca 9 air mi SW of Dale.
-118.796722
44.921528
1463
1524
Ponderosa pine and Douglas fir with open slopes. Phenology: flowering.
RM
RM
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
70880
Ronald L. Hartman Heather Bradtke
2001
6
6
157
U.S.A.
Oregon
Grant
Umatilla National Forest and Vicinity: 2.5 air mi NNE of Albee.
-118.898083
45.247583
1432
1463
Ponderosa pine and some Douglas fir. Phenology: flowering.
RM
RM
387847
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
4055
June Haines Georgia Haines and Nora Little
1985
6
9
160
U.S.A.
Wyoming
Fremont
Sweetwater Rocks: ca 3.5 air mi NNE of Jeffrey City.
-107.809
42.5403
1951
2073
Below granite outcrop. Phenology: flowering & fruiting.
RM
RM
387848
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
4191
June Haines
1985
6
18
169
U.S.A.
Wyoming
Fremont
Wind River Basin: Gas Hills Mining District; ca 4.2 air mi SSW of intersection of Gas Hills Road (Wyo Hwy 136) with Ore Road (main road through GHMD).
-107.6321
42.7443
2097
Big sagebrush-wildrye drainage bottom. Phenology: flowering & fruiting.
RM
RM
387849
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
4308
June Haines
1985
6
21
172
U.S.A.
Wyoming
Fremont
Gas Hills Mining District: ca 2.5 air mi E of the intersection of Wyo Hwy 136 and Ore Road (main road through Gas Hills Mining District).
-107.5718
42.8147
1975
2042
Sandy area along bottom of ravine. Hog Heaven, by camp road. Phenology: flowering & fruiting.
RM
RM
387850
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
4322
June Haines
1985
6
21
172
U.S.A.
Wyoming
Natrona
Wind River Basin: Gas Hills Mining District: ca 7.5 air mi ENE of the junction of Wyo Hwy 136 (Gas Hills Road) and Ore Road (main road through Gas Hills Mining District).
-107.4931
42.8584
2073
2134
Sagegrush and limber pine slopes. Phenology: flowering & fruiting.
RM
RM
387851
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
4434
June Haines
1985
6
21
172
U.S.A.
Wyoming
Fremont
Wind River Basin: Gas Hills Mining District: ca 6.5 air mi ENE of the junction of Gas Hills Road (Wyo Hwy 136) and Ore Road (main road through Gas Hills Mining District).
-107.5325
42.8438
2030
2054
Sandy area below sandstone rocks. Phenology: flowering & fruiting.
RM
RM
387852
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
4543
June Haines
1985
6
30
181
U.S.A.
Wyoming
Fremont
Granite Mountain Uplift: Willow Creek, ca 5 air mi NW of Muddy Gap Junction (Three Forks).
-107.5132
42.4119
1951
1966
Sagebrush grassland. Phenology: fruiting.
RM
RM
387853
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
4595
June Haines
1985
7
2
183
U.S.A.
Wyoming
Carbon
Northern side of the Ferris Mountains: along Little Cherry Creek and slopes above Little Cherry Creek, ca 6 air mi SE of Muddy Gap Junction (Three Forks).
-107.338
42.3108
2195
2500
Shrubby slopes. Phenology: fruiting.
RM
RM
387854
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
4620
June Haines
1985
7
2
183
U.S.A.
Wyoming
Carbon
Granite Mountain Uplift: ca 5 mi N of the Ferris Mountains, along Little Cherry Creek, ca 6 air mi E of Muddy Gap Junction (Three Forks).
-107.338
42.3686
1890
Moist edge of meadow adjacent to creek. Phenology: flowering & fruiting.
RM
RM
387855
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
4673
June Haines Georgia Haines and Nora Little
1985
7
4
185
U.S.A.
Wyoming
Fremont
Big Camp Creek Area, ca 6 air mi WSW of Muddy Gap Junction (Three Forks).
-107.5327
42.3397
2073
2134
Sagebrush grassland and slopes. Phenology: flowering & fruiting.
RM
RM
387856
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
5915
June Haines
1986
5
19
139
U.S.A.
Wyoming
Natrona
Ca 6 air mi N of Arminto.
-107.2529
43.2647
2012
2036
Ravine below Pinus flexilis-covered slopes. Phenology: flowering.
RM
RM
387857
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
5953
June Haines
1986
5
20
140
U.S.A.
Wyoming
Fremont
Wind River Basin: edge of Moneta Hills (badlands), ca 3 3/4 air mi NNE of Moneta.
-107.7081
43.2076
1716
1746
Sandstone outcrop. Phenology: flowering.
RM
RM
387858
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
5985
June Haines
1986
5
30
150
U.S.A.
Wyoming
Fremont
Edge of Government Meadows, ca 4.5 air mi NNE of Sweetwater Station.
-108.1606
42.5999
2015
2057
Sandy sagebrush grassland. Phenology: flowering.
RM
RM
387859
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
6025
June Haines Georgia Haines
1986
6
1
152
U.S.A.
Wyoming
Natrona
Wind River Basin: E-K Creek, ca 7.5 air mi NNE of Arminto.
-107.2133
43.2789
1987
2012
Sagebrush grassland on red soil. Phenology: flowering.
RM
RM
387860
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
6087
June Haines Georgia Haines
1986
6
1
152
U.S.A.
Wyoming
Natrona
South Fork Sand Creek, ca 7 1/4 air mi E of Lost Cabin.
-107.4904
43.2789
1804
1829
Sandy sagebrush grassland. Phenology: flowering.
RM
RM
387861
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
6209
June Haines
1986
6
6
157
U.S.A.
Wyoming
Fremont
Chalk Hills Draw: ca 10 air mi SE of Moneta on Castle Gardens Road.
-107.7095
43.0189
1740
1765
Sagebrush grassland and badland slopes and bottoms. Phenology: flowering.
RM
RM
387862
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
6254
June Haines Georgia Haines
1986
6
8
159
U.S.A.
Wyoming
Fremont
Granite Mountain Uplift: Granite Mountains, Long Creek Mountain, ca 15.5 air mi NW of Jeffrey City.
-108.0042
42.6733
2012
2225
Sagebrush grassland and rocky outcrops. Phenology: flowering & fruiting.
RM
RM
387863
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
6317
June Haines
1986
6
13
164
U.S.A.
Wyoming
Fremont
Sweetwater Rocks: Cranner Rock, ca 14 3/4 air mi ESE of Jeffrey City.
-107.5534
42.4529
1914
1945
Soil area between granite boulders. Phenology: flowering & fruiting.
RM
RM
387864
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
6391
June Haines Georgia Haines
1986
6
14
165
U.S.A.
Wyoming
Fremont
Granite Mountain Uplift: top of Beaver Rim: Devils Gap, ca 7 air mi NNW of Sweetwater Station.
-108.2583
42.6292
2073
2164
North facing slope and valley bottom. Phenology: flowering & fruiting.
RM
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
50
Amy J. Roderick Stuart Markow
1996
6
5
157
U.S.A.
Wyoming
Carbon
Medicine Bow Mountains: Elk Mountain: ridge above Thode Creek, ca 18 air mi S of Hanna.
-106.488
41.6064
2500
2530
Sagebrush grassland with Artemisia tridentata, Poa secunda, Symphoricarpos oreophilus, Rosa woodsii, and Poa cusickii. Phenology: flowering.
RM
RM
387865
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
6695
June Haines
1986
6
20
171
U.S.A.
Wyoming
Fremont
Wind River Basin: Red Canyon Rim, ca 14 air mi SSE of Lander.
-108.6298
42.6439
1859
1981
Sagebrush grassland at edge of moist ravine. Phenology: fruiting.
RM
RM
387866
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
6776
June Haines Georgia Haines
1986
6
21
172
U.S.A.
Wyoming
Natrona
Sweetwater Rocks: Savage Pocket, ca 13 air mi NE of Muddy Gap Junction.
-107.2585
42.482
1865
2073
Base of cliff at edge of creek. Phenology: flowering & fruiting.
RM
RM
387867
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
6844
June Haines
1986
6
27
178
U.S.A.
Wyoming
Fremont
Top of Beaver Rim, SW of Devils Gap, ca 6.5 air mi NNW of Sweetwater Station.
-108.2583
42.6146
2103
2256
Sandy soil under Pinus flexilis. Phenology: fruiting.
RM
RM
661616
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
11120
Keith H. Dueholm Ronald L. Hartman
1981
5
25
145
U.S.A.
Wyoming
Washakie
Bighorn Basin: ca 6 air mi W of Ten Sleep.
-107.5731
44.03194
1463
Sandy slopes and ridge with sandstone outcrops, disturbed, or rocky north slope, shaley slopes, flats with greasewood along drainages; slopes.
RM
RM
661569
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
11237
Keith H. Dueholm Ronald L. Hartman
1981
5
28
148
U.S.A.
Wyoming
Hot Springs
Owl Creek/Bridger Mountains: Bridger Mountains: ca 10 air mi E of Thermopolis.
-108.0063
43.6381
1737
Rich sagebrush slopes above intermittent creek, sandy slopes below Chugwater outcrops; with sage.
RM
RM
523616
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
11340
Keith H. Dueholm
1981
6
7
158
U.S.A.
Wyoming
Campbell
Powder River Basin: ca 20 air mi SE of Reno Junction.
-105.1911
43.5728
1524
Gently rolling sagebrush plain, eroded slopes with coal outcrops and sand, scoria outcrops; slopes. Phenology: flowering & fruiting.
RM
RM
524651
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
11901
Keith H. Dueholm
1983
6
28
179
U.S.A.
Wyoming
Lincoln
Southern Salt River Range and Vicinity: ca 5 air mi NNW of Kemmerer.
-110.6264
41.8572
2317
North slope of ridge, with aspen, sagebrush meadow, wet areas, creek at bottom of ridge; wet meadow. Phenology: flowering.
RM
RM
327266
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
1207
Keith H. Dueholm Ronald L. Hartman
1978
5
21
141
U.S.A.
Wyoming
Campbell
[location and coordinates withheld]
1432
Heavily grazed plains. Phenology: flowering.
RM
RM
327262
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
1351
Keith H. Dueholm Ronald L. Hartman
1978
5
24
144
U.S.A.
Wyoming
Campbell
Powder River Basin: ca 4 road mi NW of Rockypoint.
-105.1578
44.9314
1280
Open ponderosa pines. Phenology: flowering.
RM
RM
327236
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
1419
Keith H. Dueholm Ronald L. Hartman
1978
5
25
145
U.S.A.
Wyoming
Campbell
Powder River Basin: ca 6 air mi SW of Rockypoint.
-105.1733
44.8411
1158
Steep valley cut through uplift, ponderosa pines throughout, and open areas. Rocky slope above valley. Phenology: flowering.
RM
RM
327261
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
1434
Keith H. Dueholm Ronald L. Hartman
1978
5
26
146
U.S.A.
Wyoming
Campbell
[location and coordinates withheld]
1158
Rolling plains and rocky outcrop; open plains. Phenology: flowering.
RM
RM
327255
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
1540
Keith H. Dueholm Ronald L. Hartman
1978
5
27
147
U.S.A.
Wyoming
Campbell
Powder River Basin: Pumpkin Buttes: South Middle Butte, north end, above east and west faces, and rolling plains to east.
-105.8761
43.7294
1829
Pinus flexilus (E slope) and Juniperus (W slope); sagebrush plains, slope to east. Phenology: flowering.
RM
RM
327263
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
1574
Keith H. Dueholm Ronald L. Hartman
1978
5
28
148
U.S.A.
Wyoming
Campbell
Powder River Basin: Pumpkin Buttes: North Butte.
-105.9553
43.7864
1844
Eroded rocky slopes on W face, rolling plains below, and plains at summit. Juniper and limber pine on slopes; open slopes. Phenology: flowering.
RM
RM
327225
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
1709
Keith H. Dueholm Ronald L. Hartman
1978
6
3
154
U.S.A.
Wyoming
Converse
[location and coordinates withheld]
1493
Rolling plains along highway right-of-way, some rock outcrops; plains, rocky slope. Phenology: flowering & fruiting.
RM
RM
327228
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
1768
Keith H. Dueholm Ronald L. Hartman
1978
6
4
155
U.S.A.
Wyoming
Campbell
[location and coordinates withheld]
1432
Rolling plains, along highway and railroad right-of-ways; rocky slope. Phenology: flowering.
RM
RM
327235
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
1847
Keith H. Dueholm Ronald L. Hartman
1978
6
5
156
U.S.A.
Wyoming
Campbell
[location and coordinates withheld]
1250
Roadcut, plains along highway right-of-way; roadcut. Phenology: flowering.
RM
RM
327229
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
1972
Keith H. Dueholm Ronald L. Hartman
1978
6
7
158
U.S.A.
Wyoming
Campbell
Powder River Basin: White Tail Butte.
-105.54222
44.80444
1219
Sandy slopes, sagebrush plains, draws, and roadside; slope. Phenology: flowering.
RM
RM
327246
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
2045
Keith H. Dueholm
1978
6
9
160
U.S.A.
Wyoming
Campbell
Powder River Basin: along Wyo Hwy 59, 4.7 mi N of Converse County.
-105.4525
43.5711
1524
Plains along right-of-way, ditch, open ground on road cut; plains. Phenology: flowering & fruiting.
RM
RM
327241
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
2175
Keith H. Dueholm Ronald L. Hartman
1978
6
11
162
U.S.A.
Wyoming
Campbell
[location and coordinates withheld]
1493
Plains, streambanks, drying mud behind holding dam; sandy slope. Phenology: flowering.
RM
RM
327239
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
2275
Keith H. Dueholm Ronald L. Hartman and Mary Alice Sanguinetti.
1978
6
20
171
U.S.A.
Wyoming
Converse
[location and coordinates withheld]
1371
Eroded plains, gully and wash; side of gulch. Phenology: fruiting.
RM
RM
327240
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
2352
Keith H. Dueholm Ronald L. Hartman and Mary Alice Sanguinetti.
1978
6
20
171
U.S.A.
Wyoming
Campbell
Powder River Basin: ca 15.5 mi ESE of Reno Junction.
-105.1725
43.6728
1371
Sagebrush plains, ponderosa pine covered slopes, sandstone outcrops; plains. Phenology: fruiting.
RM
RM
665920
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
5057
Amy J. Roderick
1998
6
16
167
U.S.A.
Wyoming
Carbon
Upper North Platte and Laramie River Drainages: Cherry Creek, ca 5.2 air mi S of Wyo Hwy 220; ca 13.6 air mi SW of Independence Rock.
-107.2991
42.3397
2042
Moist meadow. Phenology: flowering.
RM
RM
327253
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
2486
Keith H. Dueholm Ronald L. Hartman and Mary Alice Sanguinetti.
1978
6
22
173
U.S.A.
Wyoming
Campbell
Powder River Basin: ca 9 air mi NNE of Soda Wells.
-105.2383
44.77917
1158
Eroded plains, small draw; plains. Phenology: fruiting.
RM
RM
327248
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
2550
Keith H. Dueholm Ronald L. Hartman and Mary Alice Sanguinetti.
1978
6
22
173
U.S.A.
Wyoming
Campbell
Powder River Basin: ca 10 air mi NE of Soda Wells.
-105.17694
44.77889
1189
Waste area near road, rocky slopes of buttes, ponderosa pine woodlands, shaded ravines, sagebrush plains; slope. Phenology: fruiting.
RM
RM
327247
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
2604
Keith H. Dueholm Ronald L. Hartman and Mary Alice Sanguinetti.
1978
6
23
174
U.S.A.
Wyoming
Campbell
[location and coordinates withheld]
1158
Ponderosa pine slopes, eroded plains; plains and slopes. Phenology: fruiting.
RM
RM
327214
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
2648
Keith H. Dueholm Ronald L. Hartman and Mary Alice Sanguinetti.
1978
6
24
175
U.S.A.
Wyoming
Campbell
Powder River Basin: along Eightyfive Divide; ca 7 air mi S of Montana, 5 mi E of Hwy 59.
-105.28
44.9022
1097
Rolling plains and sandstone outcrops; plains. Phenology: fruiting.
RM
RM
327250
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
2787
Keith H. Dueholm
1978
6
25
176
U.S.A.
Wyoming
Campbell
[location and coordinates withheld]
1528
Plains, and rocky slope of butte, with loose talus near summit; rocky slope. Phenology: fruiting.
RM
RM
327254
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
2833
Keith H. Dueholm
1978
6
25
176
U.S.A.
Wyoming
Campbell
[location and coordinates withheld]
1402
Plains, head of draw; plains. Phenology: fruiting.
RM
RM
327216
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
3095
Keith H. Dueholm
1978
6
28
179
U.S.A.
Wyoming
Campbell
Powder River Basin: Fletcher Canyon.
-105.9977
43.6119
1463
Dissected plain and open canyon slopes; slopes. Phenology: fruiting.
RM
RM
327264
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
3319
Keith H. Dueholm Mary Alice Sanguinetti
1978
7
5
186
U.S.A.
Wyoming
Converse
[location and coordinates withheld]
1554
Plains, sandstone outcrops, and hard sand along pipeline route; sandy cut. Phenology: fruiting.
RM
RM
327219
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
3355
Keith H. Dueholm Mary Alice Sanguinetti
1978
7
5
186
U.S.A.
Wyoming
Converse
Powder River Basin: near Bozeman Trail Monument.
-105.7869
43.3967
1646
Plains. Phenology: fruiting.
RM
RM
327220
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
3395
Keith H. Dueholm Mary Alice Sanguinetti
1978
7
6
187
U.S.A.
Wyoming
Campbell
[location and coordinates withheld]
1280
Low ditches, edge of plowed field; ditch. Phenology: fruiting.
RM
RM
327222
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
3565
Keith H. Dueholm Mary Alice Sanguinetti
1978
7
8
189
U.S.A.
Wyoming
Campbell
[location and coordinates withheld]
1219
Eroded uplands, ponderosa pine ridges, ravines, sagebrush plains, open clayey slopes, loose talus; rocky slopes. Phenology: fruiting.
RM
RM
327212
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
3717
Keith H. Dueholm Mary Alice Sanguinetti
1978
7
9
190
U.S.A.
Wyoming
Campbell
Powder River Basin: ca 10 road mi NNW of Gillette.
-105.5825
44.44167
1310
Rolling plains, sandstone uplift, outcrops, sandy ravines, highway right-of-way; plains. Phenology: fruiting.
RM
RM
327218
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
3787
Keith H. Dueholm Mary Alice Sanguinetti
1978
7
10
191
U.S.A.
Wyoming
Campbell
[location and coordinates withheld]
1250
Plains, small draw, gravelly roadcuts; slopes. Phenology: fruiting.
RM
RM
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
4409
Heather Bradtke
2002
5
21
141
U.S.A.
Oregon
Grant
Umatilla National Forest and Vicinity: Bologna Basin, ca 3 mi N and 8 mi W of Monument.
-119.603639
44.844611
1097
Juniper - ponderosa pine woods. Phenology: flowering.
RM
RM
327265
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
3965
Keith H. Dueholm Mary Alice Sanguinetti
1978
7
11
192
U.S.A.
Wyoming
Campbell
[location and coordinates withheld]
1463
Plains, draw, eroded slopes; slope. Phenology: fruiting.
RM
RM
327221
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
4077
Keith H. Dueholm Mary Alice Sanguinetti
1978
7
12
193
U.S.A.
Wyoming
Campbell
Powder River Basin: ca 7.5 air mi N of Echeta.
-105.869
44.55611
1341
Sandstone ridge, outcrops. Phenology: fruiting.
RM
RM
327237
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
4123
Keith H. Dueholm Mary Alice Sanguinetti
1978
7
13
194
U.S.A.
Wyoming
Campbell
[location and coordinates withheld]
1527
Sandy roadside buttes, loose talus slopes, outcrops, plains; slopes. Phenology: fruiting.
RM
RM
327213
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
4235
Keith H. Dueholm Mary Alice Sanguinetti
1978
7
14
195
U.S.A.
Wyoming
Campbell
[location and coordinates withheld]
1585
Sandstone ridge, outcrops, plains; shallow draw. Phenology: fruiting.
RM
RM
327215
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
4342
Keith H. Dueholm Mary Alice Sanguinetti
1978
7
15
196
U.S.A.
Wyoming
Campbell
[location and coordinates withheld]
1432
Sagebrush plains, shallow draw, roadcuts; plains. Phenology: fruiting.
RM
RM
327267
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
4395
Keith H. Dueholm Mary Alice Sanguinetti
1978
7
16
197
U.S.A.
Wyoming
Campbell
[location and coordinates withheld]
1524
Plains, scoria topped butte, loose talus slopes; slopes. Phenology: fruiting.
RM
RM
332023
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
6299
Keith H. Dueholm
1979
6
2
153
U.S.A.
Wyoming
Sheridan
[location and coordinates withheld]
1097
Rolling sagebrush plains. Phenology: flowering.
RM
RM
332026
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
6344
Keith H. Dueholm
1979
6
2
153
U.S.A.
Wyoming
Sheridan
[location and coordinates withheld]
1097
Rolling, sandy plains, sandstone outcrops, ponderosa pine on slopes; plains. Phenology: flowering.
RM
RM
332027
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
6368
Keith H. Dueholm
1979
6
3
154
U.S.A.
Wyoming
Sheridan
[location and coordinates withheld]
1280
Rolling plains. Phenology: flowering.
RM
RM
332028
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
6437
Keith H. Dueholm
1979
6
4
155
U.S.A.
Wyoming
Johnson
[location and coordinates withheld]
1585
Sandy, rolling plains, draws; plains. Phenology: flowering.
RM
RM
332024
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
6583
Keith H. Dueholm
1979
6
5
156
U.S.A.
Wyoming
Johnson
Powder River Basin: along South Fork Powder River, ca 7.5 air mi SE of Kaycee.
-106.5652
43.6072
1463
Rocky, loose shaley hillside, floodplain along river; slope. Phenology: flowering.
RM
RM
332029
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
6653
Keith H. Dueholm
1979
6
5
156
U.S.A.
Wyoming
Johnson
[location and coordinates withheld]
1432
Stony plains, sandstone outcrops, rocky slopes, with scattered ponderosa pines; plains. Phenology: flowering & fruiting.
RM
RM
334008
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
6693
Keith H. Dueholm
1979
6
7
158
U.S.A.
Wyoming
Sheridan
Powder River Basin: hills above S R Creek, ca 8 air mi E of Wyarno.
-106.5967
44.7989
1341
Rocky slopes, scoria, sagebrush plains, mesic ravine; slopes. Phenology: fruiting.
RM
RM
334153
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
6761
Keith H. Dueholm
1979
6
9
160
U.S.A.
Wyoming
Sheridan
Powder River Basin: ca 8 air mi N of Leiter.
-106.2536
44.8278
1189
Rolling sagebrush plain, shallow draws; plains. Phenology: flowering & fruiting.
RM
RM
332022
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
6850
Keith H. Dueholm
1979
6
9
160
U.S.A.
Wyoming
Sheridan
[location and coordinates withheld]
1402
Deep, mesic ravine in high hills, slopes with granite boulders, plum thickets; slopes. Phenology: flowering.
RM
RM
332021
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
6912
Keith H. Dueholm
1979
6
10
161
U.S.A.
Wyoming
Natrona
[location and coordinates withheld]
1524
Sandstone outcrops with Cercocarpus ledifolius, ravines, sagebrush plain; plains.
RM
RM
332030
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
6960
Keith H. Dueholm
1979
6
18
169
U.S.A.
Wyoming
Niobrara
Powder River Basin: Indian Creek, ca 7 air mi NW of Whitman.
-104.2415
42.9234
1310
On sandy soil associated with gramma grass, plains, draws, meadow along creek; draws. Phenology: fruiting.
RM
RM
661619
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
9246
Keith H. Dueholm Ronald L. Hartman
1980
5
22
143
U.S.A.
Wyoming
Washakie
Bighorn Basin: ca 9 air mi SE of Ten Sleep.
-107.3161
43.95389
1524
Hills and slopes covered with Juniperus osteosperma, open hillside; slopes.
RM
RM
350380
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
9269
Keith H. Dueholm Ronald L. Hartman
1980
5
22
143
U.S.A.
Wyoming
Washakie
Big Horn Mountains: Big Trails Stock Trail, 3.7 road mi E of Big Trails.
-107.2617
43.7656
1829
1951
High sagebrush slopes, more open north slope; slopes. Phenology: flowering.
RM
RM
350378
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
9495
Keith H. Dueholm Ronald L. Hartman
1980
5
26
147
U.S.A.
Wyoming
Big Horn
Big Horn Mountains: mouth of Dry Medicine Lodge Canyon (S9 and S16) and ridge above Medicine Lodge Canyon, and along Dry Medicine Lodge Creek (S10 and S15).
-107.54917
44.3217
1524
1737
Phenology: flowering.
RM
RM
350379
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
9515
Keith H. Dueholm Ronald L. Hartman
1980
5
26
147
U.S.A.
Wyoming
Big Horn
Big Horn Mountains: Medicine Lodge Canyon, along Cold Springs Road, ca 8 air mi NE of Hyattville.
-107.48833
44.3406
1951
Juniper/sagebrush, sandy slopes, upper reaches of canyon, with juniper and mountain mahogany; slopes. Phenology: flowering & fruiting.
RM
RM
661618
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
9556
Keith H. Dueholm Ronald L. Hartman
1980
5
26
147
U.S.A.
Wyoming
Big Horn
Bighorn Basin: NE edge of Cedar Mountain.
-107.50944
44.20444
1524
Limestone slabs, with scree slopes with juniper, sagebrush plains below; slopes.
RM
RM
661568
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
9722
Keith H. Dueholm Ronald L. Hartman
1980
5
29
150
U.S.A.
Wyoming
Park
Bighorn Basin: "Colter Hell", 3 air mi W of center of Cody.
-109.12861
44.5283
1554
Inner slopes of pits from former hot springs, surrounding plains; pit.
RM
RM
661617
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
9762
Keith H. Dueholm Ronald L. Hartman
1980
5
30
151
U.S.A.
Wyoming
Park
Bighorn Basin: Pappapau Buttes.
-109.04556
44.0853
1951
2012
Sandstone buttes, outcrops with Juniperus scopulorum, Pinus flexilus, and Pseudotsuga, lower sagebrush slopes, sandy plains above ridges; sandy plain.
RM
RM
525484
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
9801
Keith H. Dueholm Ronald L. Hartman
1980
6
1
153
U.S.A.
Wyoming
Fremont
Wind River Basin: U.S. Hwy 28, 10.5 air mi NE of Atlantic City.
-108.6114
42.6181
2042
Rocky sandstone slopes along highway; slope. Phenology: flowering & fruiting.
RM
RM
560039
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
180
Robert S. Kirkpatrick Ruth E. B. Kirkpatrick
1983
6
25
176
U.S.A.
Wyoming
Park
Absaroka Mountains: ca 18 mi W of Meeteetse, base of Carter Mountain along Rawhide Creek.
-109.2042
44.2041
2560
2743
Sagebrush grasslands, with scattered limber pine. Phenology: flowering.
RM
RM
560038
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
2676
Robert S. Kirkpatrick
1984
6
20
172
U.S.A.
Wyoming
Fremont
Absaroka Mountains: ca 9 mi NE of Dubois, ca 2 mi NW of junction of East Fork Wind River and Bear Creek.
-109.4602
43.605
2164
2378
Sagebrush grasslands (Artemisia tridentata var. wyomingensis) and limestone, shale and granite sand to boulders; moist sites. Phenology: flowering.
RM
RM
560037
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
2743
Robert S. Kirkpatrick
1984
6
21
173
U.S.A.
Wyoming
Fremont
Absaroka Mountains: ca 11 air mi NE of Dubois, 1.5 mi E of Game and Fish Elk Winter Headquarters.
-109.4801
43.6482
2256
2652
Sagebrush grasslands (Artemisia tridentata var. wyomingensis) with scattered Pinus flexilis; limestone with occasional cliffs moist sites. Phenology: flowering.
RM
RM
560036
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
2839
Robert S. Kirkpatrick
1984
6
23
175
U.S.A.
Wyoming
Fremont
Absaroka Mountains: ca 3 air mi NW of Dubois, west side of Tappan Creek in vicinity of junction with Butler Draw.
-109.6594
43.5762
2195
2256
Sagebrush grasslands (Artemisia tridentata var. wyomingensis); dry sites. Phenology: flowering & fruiting.
RM
RM
560035
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
2997
Robert S. Kirkpatrick
1984
6
27
179
U.S.A.
Wyoming
Hot Springs
Absaroka Mountains: ca 22 air mi SSW of Meeteetse, ca 0.5 mi N of the headwaters of Grass Creek, S of Twin Lakes.
-109.003
43.8507
2621
Slopes covered by Pinus flexilis and Psuedotsuga menziesii; dry, open areas. Phenology: flowering.
RM
RM
560034
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
3061
Robert S. Kirkpatrick
1984
6
27
179
U.S.A.
Wyoming
Hot Springs
Absaroka Mountains: ca 20 air mi S of Meeteetse, between Twin Buttes and Little Grass Creek.
-108.8225
43.8655
2073
Slopes with Juniperus scopulorum and Pinus flexilis; moist, open areas. Phenology: flowering & fruiting.
RM
RM
560033
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
3171
Robert S. Kirkpatrick
1984
6
29
181
U.S.A.
Wyoming
Park
Absaroka Mountains: ca 16 air mi SW of Meeteetse, upper end of the North Fork of Dick Creek, ca 5 mi from the Wood River.
-109.1032
44.0133
2317
2408
Sagebrush grasslands with scattered Potentilla fruticosa; dry areas. Phenology: flowering & fruiting.
RM
RM
560032
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
3306
Robert S. Kirkpatrick
1984
7
1
183
U.S.A.
Wyoming
Hot Springs
Absaroka Mountains: ca 21 air mi SSW of Meeteetse, in the vicinity of the headwaters of West Grass Creek.
-109.0631
43.895
2560
2713
Sagebrush grasslands with scattered Pinus flexilis; dry areas. Phenology: flowering.
RM
RM
560031
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
3560
Robert S. Kirkpatrick
1984
7
5
187
U.S.A.
Wyoming
Park
Absaroka Mountains: ca 18 air mi WSW of Meeteetse, West Fork Timber Creek, ca 1 mi W of the Timber Creek Ranger Station.
-109.2035
44.0428
2286
2408
Meadows with scattered Potentilla fruticosa; dry areas. Phenology: flowering & fruiting.
RM
RM
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
5305
Heather Bradtke
2002
6
7
158
U.S.A.
Oregon
Morrow
Umatilla National Forest and Vicinity: Alder Trail, ca 19 mi N of Monument.
-119.439778
45.098222
1402
Open ponderosa pine in overstory and Ceanothus in the understory in fine, moderately deep soil; slope 0-10; aspect south. Phenology: flowering.
RM
RM
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
5159
Amy J. Roderick
1998
6
16
167
U.S.A.
Wyoming
Carbon
Upper North Platte and Laramie River Drainages: County Road 499, ca 1.5 road mi SE from Wyo Hwy 220; ca 8.5 air mi NE from Three Forks Junction.
-107.2796
42.3975
1878
1884
Chalky, sandy hills dominated by grasses and cushion plants. Phenology: flowering & fruiting.
RM
RM
560024
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
92
Robert S. Kirkpatrick B. E. Nelson
1983
6
23
174
U.S.A.
Wyoming
Hot Springs
Absaroka Mountains: ca 39 mi WNW of Thermopolis, east side of The Holy City and near Squaw Teat Butte, along Meadow Creek.
-108.9622
43.7634
2591
Big sagebrush grasslands with occasional limber pine. Phenology: flowering.
RM
RM
661627
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
11042
Ronald L. Hartman Keith H. Dueholm
1980
5
23
144
U.S.A.
Wyoming
Washakie
Bighorn Basin: Castle Gardens, ca 6.5 air mi SW of Ten Sleep.
-107.5181
43.9549
1524
Sandy soil and sandstone outcrops.
RM
RM
350372
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
11148
Ronald L. Hartman Keith H. Dueholm
1980
5
24
145
U.S.A.
Wyoming
Big Horn
Big Horn Mountains: Medicine Lodge Canyon: west side of Medicine Lodge Creek.
-107.5289
44.32278
1524
Shale and limestone ridge, dominants include Juniper and sagebrush. Phenology: fruiting.
RM
RM
350368
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
11266
Ronald L. Hartman Keith H. Dueholm
1980
5
27
148
U.S.A.
Wyoming
Washakie
Big Horn Mountains: Rome Hill Road, ca 10.5 air mi ESE of Ten Sleep.
-107.2358
43.9839
1829
Chugwater red beds with gypsum and a little limestone. Phenology: flowering.
RM
RM
662741
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
11425
Ronald L. Hartman Keith H. Dueholm
1980
5
29
150
U.S.A.
Wyoming
Park
Cedar Mountain, ca 5.5 air mi WSW of Cody.
-109.1586
44.4962
2378
Summit and upper reaches; Dolomite outcrops with Pinus flexilis and Pseudotsuga.
RM
RM
779482
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
12685
Ronald L. Hartman Keith H. Dueholm
1981
5
26
146
U.S.A.
Wyoming
Hot Springs
East end of Black Mountain, ca 25 air mi E of Thermopolis.
-107.6962
43.6365
1585
1707
Sandstone outcrops and sandy slopes.
RM
RM
661626
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
12717
Ronald L. Hartman Keith H. Dueholm
1981
5
26
146
U.S.A.
Wyoming
Hot Springs
Bighorn Basin: ca 18 air mi E of Thermopolis.
-107.8255
43.6836
Sandstone outcrops and sandy slopes.
RM
RM
661625
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
12843
Ronald L. Hartman Keith H. Dueholm
1981
5
28
148
U.S.A.
Wyoming
Hot Springs
Bighorn Basin: Wildhorse Butte Oil Field and slopes and ridges to south, ca 11 air mi E of Thermopolis.
-107.9866
43.6381
Chugwater red beds and gypsum outcrops.
RM
RM
387876
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
12864
Ronald L. Hartman Gael Fonken
1981
6
26
177
U.S.A.
Wyoming
Natrona
Rattlesnake Mountains: Burnt Wagon Draw and surrounding north slope of range.
-106.9086
42.7431
2073
Limber pine covered north slope with drainages and open slopes and flats. Phenology: fruiting.
RM
RM
387877
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
13012
Ronald L. Hartman Gael Fonken
1981
6
26
177
U.S.A.
Wyoming
Natrona
Rattlesnake Mountains: Garfield Peak and northeast slope.
-107.2725
42.7889
2134
2513
Sandstones, shales, and limestone on lower slopes with granite above; streambanks, open slopes, and limber pine woodlands. Phenology: flowering & fruiting.
RM
RM
387875
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
13118
Ronald L. Hartman
1981
6
27
178
U.S.A.
Wyoming
Fremont
Castle Gardens, ca 17 air mi SSE of Moneta.
-107.6289
42.9481
1829
Sandstone outcrops, badlands, and sandy plains. Phenology: fruiting.
RM
RM
531007
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
13408
Ronald L. Hartman
1981
7
1
182
U.S.A.
Wyoming
Park
West ridge leading to summit of Heart Mountain.
-109.1678
44.6728
1890
2134
Open slopes and ridges and badlands; sandstone and shales. Phenology: fruiting.
RM
RM
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
5872
Heather Bradtke
2002
6
17
168
U.S.A.
Oregon
Morrow
Umatilla National Forest and Vicinity: Black Mountain from County Road 678 and Forest Road 30, ca 10 mi S and 12 mi E of Heppner.
-119.297222
45.2125
1792
Mountaintop with lupine in fine, deep, chocolate brown soil; slope 0; aspect ridgetop and south. Phenology: flowering.
RM
RM
339857
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
14056
Ronald L. Hartman
1982
7
19
200
U.S.A.
Wyoming
Fremont
Ice Slough, ca 9 air mi WNW of Jeffrey City.
-107.9814
42.5303
1966
Marsh with very boggy peat deposits and adjacent margins. Phenology: fruiting.
RM
RM
905426
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
14202
Ronald L. Hartman
1983
5
20
140
U.S.A.
Wyoming
Park
Beartooth Mountains: Littlerock Creek Drainage: ca 6 air mi W of Clark.
-109.2925
44.9206
Rocky slopes and plains. Phenology: flowering.
RM
RM
661624
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
14226
Ronald L. Hartman
1983
5
20
140
U.S.A.
Wyoming
Park
Bighorn Basin: Sugarloaf Butte: ca 2 air mi NNW of Clark.
-109.1906
44.95
Sandstone and sand; top, steep sloping and base of butte.
RM
RM
661623
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
14317
Ronald L. Hartman John Hamann
1983
5
23
143
U.S.A.
Wyoming
Park
Bighorn Basin: 9 mi NE of Cody.
-108.90528
44.5864
1646
1707
Shaley badlands with some sandstone and a little limestone (as strewn boulders).
RM
RM
661622
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
14351
Ronald L. Hartman John Hamann
1983
5
24
144
U.S.A.
Wyoming
Park
Bighorn Basin: Kimball Bench: ca 10 air mi SSW of Clark.
-109.2497
44.7742
1463
1524
Shale and sandstone slopes, ridges, and drainages.
RM
RM
661621
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
14437
Ronald L. Hartman John Hamann
1983
5
25
145
U.S.A.
Wyoming
Park
Bighorn Basin: east base of Elk Butte: ca 14 air mi SE of Cody.
-108.92389
44.35
1737
1829
Sandstone outcrops with some shale in drainage.
RM
RM
661620
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
14547
Ronald L. Hartman John Hamann
1983
5
26
146
U.S.A.
Wyoming
Park
Bighorn Basin: ca 6 air mi S of Cody.
-109.04806
44.43694
1646
1707
Sandstone outcrops with scattered limber pine and shale drainages.
RM
RM
560030
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
14852
Ronald L. Hartman Robert S. and Ruth E. B. Kirkpatrick
1983
6
10
161
U.S.A.
Wyoming
Park
Absaroka Mountains: Corral Creek and adjacent plains.
-109.4817
44.2597
1951
2073
Rolling grassy and sagebrush plains and roadsides. Phenology: flowering.
RM
RM
560029
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
14943
Ronald L. Hartman Robert S. Kirkpatrick
1983
6
12
163
U.S.A.
Wyoming
Park
Absaroka Mountains: just N of Dick Creek, 5 air mi NNE of Wood River Forest Service Station.
-109.0644
43.9964
2103
2195
Rolling grassy hills with big sagebrush, drainages, and rocky slopes and ridges with scattered limber pine and some douglas fir. Phenology: flowering.
RM
RM
560028
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
15199
Ronald L. Hartman Robert S. Kirkpatrick
1983
6
16
167
U.S.A.
Wyoming
Hot Springs
Absaroka Mountains: ca 40 air mi W of Thermopolis on South Fork Owl Creek Road, ca 3.5 road mi SW of Middle Fork Owl Creek crossing.
-109.0156
43.6632
2652
2774
Open grassy slopes with some big sagebrush, drainages, and wooded slopes with limber pine, douglas fir, and engelmann spruce. Phenology: flowering.
RM
RM
560027
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
15218
Ronald L. Hartman Robert S. Kirkpatrick
1983
6
16
167
U.S.A.
Wyoming
Hot Springs
Absaroka Mountains: Grass Creek Road, ca 10 road mi W of junction with Little Grass Creek.
-108.96194
43.88306
2225
2439
Sagebrush grassland and limber pine woodland. Phenology: flowering.
RM
RM
560026
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
15290
Ronald L. Hartman Robert S. and Ruth E. B. Kirkpatrick
1983
6
19
170
U.S.A.
Wyoming
Park
Absaroka Mountains: north end Carter Mountain, headwaters of Carter Creek and upper end of Marquette Creek, ca 16 air mi SW of Cody.
-109.20611
44.335
2073
2652
Spruce-fir forest with lodgepole and limber pine, open sagebrush grassland, and aspen and cottonwood thickets along stream. Phenology: flowering.
RM
RM
560025
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
15390
Ronald L. Hartman Robert S. Kirkpatrick
1983
6
19
170
U.S.A.
Wyoming
Park
Absaroka Mountains: Bull Creek, ca 2 air mi SE of the South Fork Shoshone River.
-109.30639
44.34917
1981
Sagebrush-rabbit brush grassland and adjacent creek bottoms. Phenology: flowering.
RM
RM
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
5212
Amy J. Roderick
1998
6
20
171
U.S.A.
Wyoming
Natrona
Upper North Platte and Laramie River Drainages: Sentinel Rocks: West Beef Acre Spring, ca 4.4 air mi E of Wyo Hwy 220; ca 4.2 air mi SW of Independence Rock.
-107.1602
42.4383
1890
Sagebrush-grassland; sandy. Phenology: fruiting.
RM
RM
560023
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
15612
Ronald L. Hartman
1983
6
23
174
U.S.A.
Wyoming
Fremont
Absaroka Mountains: East Fork Big Wind River, 7 air mi ESE of Dubois.
-109.4822
43.4994
2073
2195
Sagebrush hills with red beds and shales. Phenology: flowering & fruiting.
RM
RM
560022
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
15693
Ronald L. Hartman
1983
6
23
174
U.S.A.
Wyoming
Fremont
Southeastern Absaroka Mountains: Pole Creek, ca 16 air mi NE of Dubois.
-109.385
43.6617
2408
2530
Open slopes and drainages; substrate includes sandstone. Phenology: flowering.
RM
RM
387868
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
19888
Ronald L. Hartman June Haines
1985
5
28
148
U.S.A.
Wyoming
Fremont
Wind River Basin: ca 18 air mi S of Moneta.
-107.7461
42.9047
1768
1829
Sandy ridge with sandstone outcrops and sagebrush covered slopes. Phenology: flowering & fruiting.
RM
RM
387869
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
20007
Ronald L. Hartman June Haines
1985
5
29
149
U.S.A.
Wyoming
Natrona
Wind River Basin: Rattlesnake Mountains: ca 6 air mi WNW of Garfield Peak.
-107.3514
42.8325
2195
2378
Sagebrush covered hills, south-exposed slopes, ridge, and sandstone outcrops and moist stream drainage; upland areas. Phenology: flowering.
RM
RM
387870
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
20156
Ronald L. Hartman June Haines
1985
5
31
151
U.S.A.
Wyoming
Fremont
Wind River Basin: Sheep Mountain, ca 11 air mi SE of junction U.S. 287 and Wyo Hwy 28.
-108.4931
42.6194
1890
2195
West exposed slopes of mountain on sandstone and limestone; grassy ridges and draws with limber pine woodland at summit. Phenology: flowering.
RM
RM
387871
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
20238
Ronald L. Hartman June Haines
1985
5
31
151
U.S.A.
Wyoming
Fremont
Wind River Basin: Beaver Rim, vicinity of Butte bench mark, ca 8 air mi WSW of Sweetwater Station.
-108.3503
42.5175
2073
2195
Limestone and sandstone substrate and derived soils; windswept rim with cushion community, eroded slopes and drainages. Phenology: flowering.
RM
RM
387872
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
20310
Ronald L. Hartman June Haines
1985
6
2
153
U.S.A.
Wyoming
Natrona
Wind River Basin: Sentinel Rocks, 2.5 air mi SE of Independence Rock.
-107.1186
42.4839
1890
2195
Sandy sagebrush covered plains, granite mountains with massive boulders and moist seeps, aspen woodlands in drainages; sandy sagebrush covered plains. Phenology: fruiting.
RM
RM
387873
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
20409
Ronald L. Hartman June Haines
1985
6
2
153
U.S.A.
Wyoming
Natrona
Wind River Basin: Poison Spider Road, ca 14 air mi W of Poison Spider Oil Field.
-107.0183
42.8317
1890
Sandy slopes and ridge with sandstone outcrops. Phenology: fruiting.
RM
RM
387874
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
20493
Ronald L. Hartman
1985
6
3
154
U.S.A.
Wyoming
Fremont
Wind River Basin: Crooks Gap Road, ca 6.5 air mi S of Jeffrey City.
-107.8417
42.3989
1981
Sagebrush flats and stream margin. Phenology: flowering & fruiting.
RM
RM
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
23641
Ronald L. Hartman Nancy Kastning
1988
6
14
166
U.S.A.
Wyoming
Carbon
Sierra Madre/Park Ranges: Sierra Madre: ca 14 air mi NNW of Bridger Peak.
-107.2081
41.3889
2408
Shortgrass prairie on bench land high in calcium carbonate; on slopes.
RM
RM
665919
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
5302
Amy J. Roderick
1998
6
21
172
U.S.A.
Wyoming
Fremont
Upper North Platte and Laramie River Drainages: Granite Mountains: Lankin Gap between Lankin Dome and McIntosh Peak, ca 3 air mi NW of Split Rock.
-107.5534
42.5112
1981
2042
Drainage through granite boulders; thickets of Physocarpus monogynus and other shrubs. Phenology: flowering & fruiting.
RM
RM
327233
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
5205
Ronald L. Hartman Keith Dueholm
1978
5
21
141
U.S.A.
Wyoming
Converse
Powder River Basin: Wyo Hwy 59, ca 20 mi N of Douglas.
-105.2664
43.0347
1493
Sandy banks. Phenology: flowering.
RM
RM
327260
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
5292
Ronald L. Hartman Keith Dueholm
1978
5
22
142
U.S.A.
Wyoming
Campbell
Powder River Basin: breaks of the Rochelle Hills, road ca 7 mi S of U.S. Hwy 16 and 1 mi E of Rozet.
-105.1953
44.19778
1463
Breaks. Phenology: flowering.
RM
RM
327232
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
5481
Ronald L. Hartman Keith Dueholm
1978
5
25
145
U.S.A.
Wyoming
Campbell
Powder River Basin: ca 5.5 mi N of Soda Wells.
-105.31972
44.7081
1158
Rolling hills dissected by stream; sandy slopes. Phenology: flowering.
RM
RM
327230
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
5751
Ronald L. Hartman Keith Dueholm
1978
5
29
149
U.S.A.
Wyoming
Campbell
Powder River Basin: along All Night Creek, ca 8 air mi E of South Pumpkin Butte.
-105.6917
43.6989
1524
Along creek. Phenology: flowering.
RM
RM
327226
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
5900
Ronald L. Hartman Keith Dueholm
1978
6
3
154
U.S.A.
Wyoming
Campbell
Powder River Basin: Little Thunder Creek, ca 8 air mi SE of Reno Junction.
-105.3514
43.6864
1463
Slopes and outcrops along river; slope. Phenology: flowering.
RM
RM
327227
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
6050
Ronald L. Hartman Keith Dueholm
1978
6
5
156
U.S.A.
Wyoming
Campbell
Powder River Basin: Chicken Creek Divide, 2.5 mi N of Spotted Horse.
-105.8275
44.7458
1280
Ridge, slopes, badly eroded valleys, and plains; sandy slope. Phenology: flowering & fruiting.
RM
RM
327245
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
6154
Ronald L. Hartman Keith Dueholm
1978
6
6
157
U.S.A.
Wyoming
Campbell
Powder River Basin: near the Powder River, ca 17 air mi NNW of Spotted Horse.
-105.9736
44.92083
1097
Eroded hills overlooking river; open slope. Phenology: flowering.
RM
RM
327244
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
6260
Ronald L. Hartman Keith Dueholm
1978
6
7
158
U.S.A.
Wyoming
Campbell
Powder River Basin: ca 1 air mi S of Montana and 6.5 air mi W of Wyo Hwy 59.
-105.50278
44.9878
1128
Dissected slopes near road. Phenology: flowering & fruiting.
RM
RM
327243
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
6328
Ronald L. Hartman
1978
6
8
159
U.S.A.
Wyoming
Campbell
Powder River Basin: ca 18 air mi SE of Gillette.
-105.29222
44.095
1432
Hill with grassy ridge and steep slopes, eroded slopes, and roadside; slope. Phenology: flowering & fruiting.
RM
RM
327242
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
6446
Ronald L. Hartman
1978
6
9
160
U.S.A.
Wyoming
Campbell
Powder River Basin: 18 air mi SSE of Gillette.
-105.3317
44.0364
1402
Rocky slopes and plains below; plains. Phenology: flowering & fruiting.
RM
RM
327231
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
6549
Ronald L. Hartman Keith H. Dueholm
1978
6
10
161
U.S.A.
Wyoming
Campbell
Powder River Basin: head of Piney Canyon, ca 22 air mi SE of Reno Junction.
-105.1117
43.5881
1432
Rocky slopes, stream margins, and ponderosa pine woodlands; open slope. Phenology: flowering.
RM
RM
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
7220
Heather Bradtke
2002
7
1
182
U.S.A.
Washington
Garfield
Umatilla National Forest and Vicinity: Cape Horn Ridge, ca 8 mi S and 15 mi W of Anatone.
-117.442222
46.256389
1167
1359
Grass steppe in shallow, copper, platey soil; slope: 10; aspect southwest. Phenology: flowering.
RM
RM
327249
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
6954
Ronald L. Hartman Keith Dueholm and Mary Alice Sanguinetti
1978
6
22
173
U.S.A.
Wyoming
Campbell
Powder River Basin: ca 11.5 air mi NNE of Weston.
-105.2383
44.77917
1158
Open slopes. Phenology: fruiting.
RM
RM
327234
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
7101
Ronald L. Hartman Keith Dueholm and Mary Alice Sanguinetti
1978
6
23
174
U.S.A.
Wyoming
Campbell
Powder River Basin: ca 18 air mi WNW of Rockypoint.
-105.464
44.9603
1158
Eroded hills with ponderosa pine. Phenology: fruiting.
RM
RM
327224
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
7183
Ronald L. Hartman Keith Dueholm and Mary Alice Sanguinetti
1978
6
24
175
U.S.A.
Wyoming
Campbell
Powder River Basin: Eighty-five Divide, ca 11 air mi W of Rockypoint.
-105.32083
44.9314
1097
Hills with sandstone outcrops. Phenology: fruiting.
RM
RM
327252
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
7248
Ronald L. Hartman Mary Alice Sanguinetti
1978
6
25
176
U.S.A.
Wyoming
Campbell
Powder River Basin: ca 9 air mi SW of Gillette.
-105.6408
44.20944
1402
Low hills with drainage and large shallow pond on flat. Phenology: flowering & fruiting.
RM
RM
327217
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
7519
Ronald L. Hartman Mary Alice Sanguinetti
1978
6
27
178
U.S.A.
Wyoming
Johnson
Powder River Basin: ca 22 air mi NNE of Sussex.
-106.0992
43.9733
1341
Low hills and drainage. Phenology: fruiting.
RM
RM
327223
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
7736
Ronald L. Hartman Mary Alice Sanguinetti
1978
6
29
180
U.S.A.
Wyoming
Campbell
Powder River Basin: Wyo Hwy 387, ca 3.5 road mi E of Johnson County.
-105.9366
43.5536
1524
Sandstone outcrop along highway. Phenology: fruiting.
RM
RM
350371
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
9168
Ronald L. Hartman Ann Odasz
1979
6
21
172
U.S.A.
Wyoming
Big Horn
Big Horn Mountains: Bighorn National Forest: ca 4 air mi NW of Tyrrell Ranger Station.
-107.2931
44.2192
2560
Limestone outcrops at edge of forest. Phenology: flowering.
RM
RM
350370
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
9259
Ronald L. Hartman Ann Odasz
1979
6
23
174
U.S.A.
Wyoming
Sheridan
Big Horn Mountains: Bighorn National Forest: Ice Creek, ca 8.8 air mi W of Burgess Junction.
-107.69
44.7731
2743
2804
Openings on slopes and ridges. Phenology: flowering.
RM
RM
350367
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
9464
Ronald L. Hartman Ann Odasz
1979
6
25
176
U.S.A.
Wyoming
Sheridan
Big Horn Mountains: Bighorn National Forest: Boyd Ridge, ca 18 air mi W of Parkman.
-107.69389
44.9594
2256
Meadows and aspen groves. Phenology: flowering.
RM
RM
350369
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
9598
Ronald L. Hartman
1979
6
27
178
U.S.A.
Wyoming
Johnson
Big Horn Mountains: ca 1 air mi W of Dullknife Reservoir spillway.
-107.07889
44.0281
2560
2652
Hill with limestone outcrops, scattered wooded slopes, and meadows. Phenology: flowering.
RM
RM
332025
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
9982
Ronald L. Hartman
1979
7
12
193
U.S.A.
Wyoming
Natrona
Oil field, ca 4.2 air mi N of Waltman.
-107.1936
43.1192
1890
Eroded shale slopes with sandstone outcrops and drainages. Phenology: flowering & fruiting.
RM
RM
665918
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
5363
Amy J. Roderick
1998
6
23
174
U.S.A.
Wyoming
Natrona
[location and coordinates withheld]
1951
Gravelly hills; black sage, creeping juniper, and limber pine common. Phenology: fruiting.
RM
RM
588296
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
1770
Walter Fertig
1990
6
15
166
U.S.A.
Wyoming
Sublette
West Slope Wind River Range: south shore of Willow Lake, ca 8.5 air mi N of Pinedale.
-109.87
42.9903
2347
2500
Open, south-facing rocky sagebrush ridge. Phenology: flowering.
RM
RM
588295
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
1878
Walter Fertig
1990
6
15
166
U.S.A.
Wyoming
Sublette
West Slope Wind River Range: Fremont Ridge, ca 8 air mi NNE of Pinedale.
-109.8106
42.9753
2329
2408
Sagebrush\Purshia ridge. Phenology: flowering.
RM
RM
588294
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
2484
Walter Fertig
1990
6
25
176
U.S.A.
Wyoming
Sublette
West Slope Wind River Range: Half Moon Lake, ca 8 air mi NE of Pinedale.
-109.7506
42.9314
2347
2408
Open sagebrush slope. Phenology: flowering & fruiting.
RM
RM
588293
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
2498
Walter Fertig
1990
6
25
176
U.S.A.
Wyoming
Sublette
West Slope Wind River Range: Half Moon Lake, ca 8 air mi NE of Pinedale.
-109.7506
42.9314
2347
2408
Shady aspen woods. Phenology: flowering & fruiting.
RM
RM
588292
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
2613
Walter Fertig
1990
6
30
181
U.S.A.
Wyoming
Sublette
West Slope Wind River Range: Between east shore of Fremont Lake and Skyline Drive, ca 2.5 road mi S of road to Half Moon Lake, ca 4 miles NE of Pinedale.
-109.81
42.9172
2335
2347
Rocky sagebrush opening with black fluffy soil. Phenology: flowering & fruiting.
RM
RM
667063
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
538
Amy J. Roderick Ronald L. Hartman
1997
6
9
160
U.S.A.
Wyoming
Carbon
Upper North Platte and Laramie River Drainages: Whiskey Gap at west end of Ferris Mountains, ca 2.5 air mi SE of Three Forks Junction; ca 10 air mi NE of Bairoil.
-107.4159
42.3397
2042
2134
Ridge and north facing forested slope leading into sagebrush bottom. Phenology: flowering.
RM
RM
588301
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
7257
Walter Fertig
1991
6
8
159
U.S.A.
Wyoming
Fremont
West Slope Wind River Range: Acorn Ridge, Sweetwater River, ca 4 air mi NW of Wyo Hwy 28, ca 37 air mi NE of Farson.
-108.9744
42.4125
2317
2435
Sandy sagebrush grassland at base of ridge. Phenology: flowering.
RM
RM
588300
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
7563
Walter Fertig
1991
6
11
162
U.S.A.
Wyoming
Sublette
West Slope Wind River Range: Southwest slopes of Little Prospect Mountain, ca 2 air mi S of Leckie, ca 35 air mi SE of Pinedale.
-109.2944
42.5547
2310
2591
Rocky, dry, barren foothills. Phenology: flowering.
RM
RM
588299
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
7625
Walter Fertig
1991
6
12
163
U.S.A.
Wyoming
Sublette
West Slope Wind River Range: Ridge ca 0.5 mi ENE of Meadow Lake and 0.5 mi W of Burnt Lake, ca 11 air mi E of Pinedale.
-109.6711
42.9022
2439
2743
Rocky, open canopy ridgeline. Phenology: flowering.
RM
RM
588298
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
7967
Walter Fertig
1991
6
16
167
U.S.A.
Wyoming
Sublette
West Slope Wind River Range: ridge and flats adjacent to dirt road leading to Irish Canyon, ca 1 mi N of Big Sandy, ca 25.5 air mi SE of Pinedale.
-109.4314
42.6542
2317
2408
Rocky sagebrush grassland on ridge. Phenology: flowering.
RM
RM
588297
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
8040
Walter Fertig
1991
6
18
169
U.S.A.
Wyoming
Sublette
West Slope Wind River Range: Pole Creek drainage and adjacent ridges, between Fayette Lake and Half Moon Lake, ca 9 air mi NE of Pinedale.
-109.6911
42.9456
2317
2743
Granitic outcrop adjacent to Pole Creek where it enters Half Moon Lake. Phenology: flowering.
RM
RM
584982
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
8200
Walter Fertig
1991
6
25
176
U.S.A.
Wyoming
Sublette
West Slope Wind River Range: ridge 0.5 mi SW of Blueberry Lake, 0.5 mi E of Boulder Lake, ca 12.5 air mi E of Pinedale.
-109.6117
42.8731
2365
2560
Open sagebrush grassland on south face of ridge. Phenology: flowering.
RM
RM
584981
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
8460
Walter Fertig
1991
6
28
179
U.S.A.
Wyoming
Sublette
West Slope Wind River Range: 1/8 mi W of confluence of Larsen Creek and Sweetwater River, ca 45 air mi SE of Pinedale.
-109.08
42.5856
2621
2695
Open canopy sagebrush-grassland hillside. Soil sandy-gravelly. Phenology: flowering & fruiting.
RM
RM
584980
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
8545
Walter Fertig
1991
6
28
179
U.S.A.
Wyoming
Sublette
West Slope Wind River Range: Block and Tackle Hill, on Continental Divide, ca 42.5 air mi SE of Pinedale.
-109.1581
42.5708
2621
2743
Open canopy south-facing sandy ridge with mixed sagebrush and aspen. Phenology: flowering.
RM
RM
584979
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
8663
Walter Fertig
1991
7
1
182
U.S.A.
Wyoming
Sublette
West Slope Wind River Range: Scab Creek drainage, ca 17 air mi E of Pinedale.
-109.5536
42.8153
2439
2621
Open canopy, dry ledges and crevices of granitic outcrop above creek. Phenology: flowering & fruiting.
RM
RM
600185
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
24764
B. E. Nelson
1993
5
17
137
U.S.A.
Wyoming
Natrona
Southern Powder River Basin/Southeastern Plains: Southern Powder River Basin: ca 1-1.5 mi E of I-25, ca 13 air mi N of Casper.
-106.3103
43.0472
1695
1707
Flats of Carex with areas of Artemisia cana. Phenology: flowering & fruiting.
RM
RM
600186
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
24804
B. E. Nelson
1993
5
17
137
U.S.A.
Wyoming
Natrona
Southern Powder River Basin/Southeastern Plains: Southern Powder River Basin: along Coal Draw between Salt Creek and County Road 116, ca 2.5 air mi N of Midwest.
-106.2817
43.4508
1454
1457
Bench along creek with Sarcobatus and Tamarix thickets. Phenology: flowering.
RM
RM
600187
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
24856
B. E. Nelson
1993
5
19
139
U.S.A.
Wyoming
Platte
[location and coordinates withheld]
1317
1341
Rough breaks with scattered juniper and ponderosa pine and interspersed sandy areas. Phenology: flowering.
RM
RM
600188
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
24893
B. E. Nelson
1993
5
19
139
U.S.A.
Wyoming
Goshen
Southern Powder River Basin/Southeastern Plains: Southeastern Plains: ca 4 mi N of Prairie Center on County Road 25, ca 35 air mi N of Torrington.
-104.2001
42.5721
1503
1512
Mixed grass plains. Phenology: flowering.
RM
RM
600189
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
24917
B. E. Nelson
1993
5
20
140
U.S.A.
Wyoming
Niobrara
Southern Powder River Basin/Southeastern Plains: Hat Creek Breaks: ca 18 air mi NE of Lusk off S Bar or County Road 62.
-104.1289
42.8665
1509
1548
Small openings in the ponderosa pine forest of the breaks. Phenology: flowering.
RM
RM
600190
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
24973
B. E. Nelson
1993
5
20
140
U.S.A.
Wyoming
Niobrara
Southern Powder River Basin/Southeastern Plains: Southern Powder River Basin: between Alum Creek and Old Woman Creek Hills, ca 19.7 air mi ENE of Lance Creek; ca 25 air mi NNE of Lusk.
-104.6534
43.0971
1295
1347
Swales and moist sagebrush-grasslands. Phenology: flowering & fruiting.
RM
RM
600191
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
25001
B. E. Nelson
1993
5
20
140
U.S.A.
Wyoming
Niobrara
Southern Powder River Basin/Southeastern Plains: Southern Powder River Basin: along Wyo Hwy 270 just W of intersection with Wyo Hwy 272, ca 2 air mi NE of Lance Creek; ca 22.5 air mi NNW of Lusk.
-104.6152
43.0524
1347
1384
Ridge top with conglomerate boulders and outcrops. Phenology: flowering & fruiting.
RM
RM
600192
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
25025
B. E. Nelson
1993
5
20
140
U.S.A.
Wyoming
Converse
Southern Powder River Basin/Southeastern Plains: Hat Creek Breaks: Flat Top, ca 5.5 air mi NNW of Shawnee; ca 17.5 air mi ENE of Douglas.
-105.0453
42.8172
1646
Moist meadow, lower slopes, and drainages on limestone butte. Phenology: flowering.
RM
RM
600193
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
25058
B. E. Nelson
1993
5
23
143
U.S.A.
Wyoming
Converse
Southern Powder River Basin/Southeastern Plains: Southern Powder River Basin: S of Mikes Draw along Wyo Hwy 59 and Burlington Northern Railroad, ca 7 air mi S of Bill; ca 26.5 air mi N of Douglas.
-105.2647
43.1233
1454
1472
Sandy clay sagebrush-grassland with sparsely vegetated knolls. Phenology: flowering.
RM
RM
600194
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
25081
B. E. Nelson
1993
5
23
143
U.S.A.
Wyoming
Converse
Southern Powder River Basin/Southeastern Plains: Southern Powder River Basin: Thunder Basin National Grasslands: along Cow Creek or County Road 45, ca 8.7 air mi NE of Bill; ca 39.5 air mi NNE of Douglas.
-105.1042
43.3008
1463
1475
Sandy clay sagebrush-grassland with sparsely vegetated knolls. Phenology: flowering & fruiting.
RM
RM
600195
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
25116
B. E. Nelson
1993
5
24
144
U.S.A.
Wyoming
Converse
Southern Powder River Basin/Southeastern Plains: Southern Powder River Basin: Thunder Basin National Grasslands: along Steinle or County Road 40, ca 8 air mi NE of Bill; ca 41 air mi NNE of Douglas.
-105.1467
43.3283
1432
1445
Sagebrush-sedge-grassland. Phenology: flowering & fruiting.
RM
RM
600174
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
25138
B. E. Nelson
1993
5
24
144
U.S.A.
Wyoming
Converse
Southern Powder River Basin/Southeastern Plains: Southern Powder River Basin: ca 1.5 mi S and also ca 1.7 mi E of the Cheyenne River on Clareton or County Road 39, ca 5.5 air mi NE of Dull Center; ca 62.5 air mi NNE Douglas.
-104.9061
43.49
1329
1347
Sedge-grassland flats with eroded slopes and draws below. Phenology: flowering & fruiting.
RM
RM
600175
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
25191
B. E. Nelson
1993
5
24
144
U.S.A.
Wyoming
Niobrara
Southern Powder River Basin/Southeastern Plains: Southern Powder River Basin: above Sage Creek on old U.S. Hwy 85, ca 5 air mi ESE of Mule Creek Junction; ca 45 air mi NNE of Lusk.
-104.1291
43.3613
1207
1231
Just below rims of steep eroded slopes of badlands. Phenology: flowering & fruiting.
RM
RM
600176
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
25224
B. E. Nelson
1993
5
26
146
U.S.A.
Wyoming
Converse
Southern Powder River Basin/Southeastern Plains: Southeastern Plains: above Lost Creek on Harris or County Road 58, ca 2.5 air mi S of Lost Springs; ca 23 air mi E of Douglas.
-104.9425
42.7317
1512
1530
Sandy prairie with scattered patches of sagebrush. Phenology: flowering.
RM
RM
600177
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
25238
B. E. Nelson
1993
5
26
146
U.S.A.
Wyoming
Niobrara
Southern Powder River Basin/Southeastern Plains: Hartville Uplift: ridge between Wyo Hwy 270 and upper Page Flat Draw, ca 8.3 air mi S of Manville; ca 10.7 air mi SW of Lusk.
-104.6097
42.6586
1737
1835
Grassland on stony soil near top of ridge. Phenology: flowering.
RM
RM
600178
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
25297
B. E. Nelson
1993
5
26
146
U.S.A.
Wyoming
Goshen
Southern Powder River Basin/Southeastern Plains: Hartville Uplift: Wildcat Hills: between the heads of Willow and Muskrat creeks, ca 43 air mi NNW of Torrington.
-104.6065
42.59
1731
1786
Stony sandstone ridge and upper slopes. Phenology: flowering & fruiting.
RM
RM
600179
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
25382
B. E. Nelson
1993
5
27
147
U.S.A.
Wyoming
Platte
Southern Powder River Basin/Southeastern Plains: Hartville Uplift: at the head of Webb Canyon on Wyo Hwy 270, ca 4.5 air mi N of Hartville; ca 8.5 air mi N of Guernsey.
-104.7047
42.3847
1585
1664
Stony sagebrush-grassland on limestone. Phenology: flowering & fruiting.
RM
RM
600180
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
25396
B. E. Nelson
1993
5
27
147
U.S.A.
Wyoming
Platte
Southern Powder River Basin/Southeastern Plains: Hartville Uplift: between Rocky Pass and Long Canyon, ca 1.3 air mi NW of Hartville; ca 4.7 air mi N of Guernsey.
-104.7436
42.3428
1457
1512
Flat area with extensive limestone pavement above canyons dominated by juniper and mountain mahogany. Phenology: flowering & fruiting.
RM
RM
600181
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
25444
B. E. Nelson
1993
5
27
147
U.S.A.
Wyoming
Goshen
Southern Powder River Basin/Southeastern Plains: Goshen Hole: between Horse Creek and Table Mountain on Wyoming Game and Fish Table Mountain Wildlife Management Area, ca 4 air mi SSE of Huntley; ca 14 air mi S of Torrington.
-104.12
41.88
1256
1268
Grasslands on sandy clay soils with marshes and playas. Phenology: flowering & fruiting.
RM
RM
600182
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
25525
B. E. Nelson
1993
5
30
150
U.S.A.
Wyoming
Platte
Southern Powder River Basin/Southeastern Plains: Goshen Hole Rim: ca 13.5 air mi N of Chugwater; ca 12 air mi SE of Wheatland.
-104.7789
41.9517
1524
1573
Rough breaks with conglomerates and cobblestones at upper levels and mudstones and soft sandstones below. Phenology: flowering.
RM
RM
600183
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
25766
B. E. Nelson
1993
6
14
165
U.S.A.
Wyoming
Goshen
Southern Powder River Basin/Southeastern Plains: Goshen Hole Rim: northwest end of Bear Mountain, ca 7 air mi SSW of Hawk Springs; ca 27 air mi SSW of Torrington.
-104.3139
41.692
1524
1597
Steep, sandy north slopes below sandstone cliffs with outcrops and blocks. Phenology: fruiting.
RM
RM
664715
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
30090
B. E. Nelson
1994
5
12
132
U.S.A.
Wyoming
Converse
Southern Powder River Basin/Southeastern Plains: Southern Powder River Basin: along South Fork of Dry Fork Cheyenne River at the end of 55 Ranch or County Road 23, ca 1-1.5 air mi E of Pine Ridge, ca 19 air mi E of Glenrock.
-105.8478
43.1362
1658
1670
A mosaic of sagebrush-grasslands and sedge-grasslands. Phenology: flowering.
RM
RM
664687
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
30134
B. E. Nelson
1994
5
12
132
U.S.A.
Wyoming
Converse
Southern Powder River Basin/Southeastern Plains: Southern Powder River Basin: ridge between Phillips and Brown Springs creeks ca 2 air mi S of Dry Fork Cheyenne River off Ross or County Road 31, ca 23 air mi NNE of Glenrock.
-105.7291
43.179
1658
1664
A mosaic of sagebrush-grasslands and sedge-grasslands. Phenology: flowering.
RM
RM
664686
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
30160
B. E. Nelson
1994
5
12
132
U.S.A.
Wyoming
Converse
Southern Powder River Basin/Southeastern Plains: Southern Powder River Basin: off Ross or County Road 31 N of North Fork Bear Creek below Manning Flat, ca 31.5 air mi NNE of Glenrock; ca 13.3 air mi SE of Ross.
-105.7093
43.2932
1615
1652
Sagebrush-grassland. Phenology: flowering.
RM
RM
664685
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
30184
B. E. Nelson
1994
5
16
136
U.S.A.
Wyoming
Niobrara
Southern Powder River Basin/Southeastern Plains: Southern Powder River Basin: in Kaye Oil Field on the divide between Walker and Twentymile creeks, ca 12.3 air mi WNW of Lance Creek; ca 31 air mi NW of Lusk.
-104.8826
43.082
1408
1469
With scattered juniper on slopes and sides of washes and gullies. Phenology: flowering & fruiting.
RM
RM
664684
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
30204
B. E. Nelson
1994
5
17
137
U.S.A.
Wyoming
Niobrara
Southern Powder River Basin/Southeastern Plains: Southern Powder River Basin: hills N of Cow Creek on Cow Creek or County Road 3, ca 17.8 air mi NNW of Lance Creek; ca 39 air mi NNW of Lusk.
-104.7339
43.2856
1310
1338
Sedge-grassland on rolling dissected plains. Phenology: flowering.
RM
RM
664683
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
30219
B. E. Nelson
1994
5
17
137
U.S.A.
Wyoming
Niobrara
Southern Powder River Basin/Southeastern Plains: Southern Powder River Basin: at head of a branch of Garland Draw on Dixon or County Road 2 ca 2 air mi S of Weston County, ca 18.8 air mi WNW of Mule Creek Junction; ca 50.5 air mi NNW of Lusk.
-104.6777
43.4736
1310
1335
Rolling plains with a mosaic of sagebrush-grassland and sedge-grassland and occasional sandstone outcrops. Phenology: flowering & fruiting.
RM
RM
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
30314
B. E. Nelson
1994
5
17
137
U.S.A.
Wyoming
Weston
Southern Powder River Basin/Southeastern Plains: Southern Powder River Basin: along Roxson Road ca 1/2-3/4 mi N of Weston County, ca 3.3 air mi WSW of Morisey; ca 28.5 air mi SW of Newcastle.
-104.4527
43.515
1256
1292
Rolling dissected plain of sagebrush-grassland and sedge-grassland mosaic. Phenology: flowering.
RM
RM
664678
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
30330
B. E. Nelson
1994
5
17
137
U.S.A.
Wyoming
Niobrara
Southern Powder River Basin/Southeastern Plains: Hat Creek Breaks: near the Rest Area on U.S. Hwy 18 and 85, ca 9.3 air mi N of Lusk.
-104.4098
42.8949
1500
1524
Grassy slopes and flats above the canyons. Phenology: flowering.
RM
RM
664677
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
30353
B. E. Nelson
1994
5
19
139
U.S.A.
Wyoming
Platte
Southern Powder River Basin/Southeastern Plains: Southeastern Plains: along Horseshoe or County Road 59 S of Horseshoe Creek, ca 6 air mi SW of Glendo; ca 27.5 air mi NNW of Wheatland.
-105.1179
42.4426
1463
1506
Red bed slopes and draws covered with cobblestones. Phenology: flowering.
RM
RM
664676
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
30387
B. E. Nelson
1994
5
19
139
U.S.A.
Wyoming
Platte
Southern Powder River Basin/Southeastern Plains: Southeastern Plains: along Horseshoe or County Road 59 at Sand Draw S of Horseshoe Creek, ca 9.5 air mi SW of Glendo; ca 27.5 air mi NNW of Wheatland.
-105.1758
42.4275
1542
1554
Coarse sand - fine gravel soil in sagebrush-grassland. Phenology: flowering.
RM
RM
664675
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
30437
B. E. Nelson
1994
5
19
139
U.S.A.
Wyoming
Platte
Laramie Mountains: along Harris Park or County Road 210 ca 1 air mi N of Cottonwood Creek, ca 2 air mi E of Albany County; ca 16 air mi SW of Glendo; ca 24 air mi NW of Wheatland.
-105.2345
42.3271
1731
1756
A mosaic of sagebrush-grassland and ponderosa pine forest. Phenology: flowering.
RM
RM
664674
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
30518
B. E. Nelson
1994
5
19
139
U.S.A.
Wyoming
Platte
Southern Powder River Basin/Southeastern Plains: Southeastern Plains: along Marble or County Road 167 ca 1 air mi E of the Marble Quarry N of Marble Quarry Creek, ca 13 air mi W of Wheatland.
-105.2057
42.0839
1512
1536
Sagebrush-grassland slopes and benches with fine gravelly soils and cobblestones. Phenology: flowering.
RM
RM
664673
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
30561
B. E. Nelson
1994
5
23
143
U.S.A.
Wyoming
Natrona
Southern Powder River Basin/Southeastern Plains: Southern Powder River Basin: on Notches Dome ca 1 air mi S of Okie Draw, ca 12 air mi NE of Waltman; ca 44 air mi NW of Casper.
-107.0352
43.2076
1823
1829
Steep soft clay cobblestone hills with scattered sagebrush, greasewood, and bluebunch wheatgrass. Phenology: flowering.
RM
RM
664672
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
30626
B. E. Nelson
1994
5
23
143
U.S.A.
Wyoming
Natrona
Southern Powder River Basin/Southeastern Plains: Southern Powder River Basin: along Baker Cabin or County Road 108 between North Fork Cottonwood Creek and Gray Wall, ca 12 air mi NE of Arminto; ca 51 air mi NW of Casper.
-107.1144
43.3217
1932
1978
In sand, grassy sandy areas, sandstone outcrops, and clay slopes. Phenology: flowering.
RM
RM
664671
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
30670
B. E. Nelson
1994
5
23
143
U.S.A.
Wyoming
Natrona
Southern Powder River Basin/Southeastern Plains: Southern Powder River Basin: along Thirtythree Mile or County Road 110 ca 1.5 air mi W of Alkali Creek, 28.5 air mi W of Midwest; ca 43 air mi NW of Casper.
-106.8325
43.3758
1609
1804
Grassland. Phenology: flowering & fruiting.
RM
RM
664670
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
30772
B. E. Nelson
1994
5
25
145
U.S.A.
Wyoming
Natrona
Southern Powder River Basin/Southeastern Plains: Southern Powder River Basin: along the Oregon Trail on Oregon Trail or County Road 319, ca 1.5 air mi ENE of Ryan (Prospect) Hill, ca 27.8 air mi SW of Casper.
-106.767
42.6715
1841
1942
Shallow draws on slopes. Phenology: flowering.
RM
RM
664669
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
30814
B. E. Nelson
1994
5
26
146
U.S.A.
Wyoming
Goshen
Southern Powder River Basin/Southeastern Plains: Southeastern Plains: along County Road just S of the Laramie River, ca 3.5 air mi WSW of Fort Laramie; ca 22.3 air mi NW of Torrington.
-104.581
42.193
1304
1323
Steep cobblestone slopes. Phenology: flowering & fruiting.
RM
RM
664668
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
30854
B. E. Nelson
1994
5
26
146
U.S.A.
Wyoming
Platte
Southern Powder River Basin/Southeastern Plains: Southeastern Plains: hills S of the Laramie River and SW of Grayrocks Reservoir, ca 8.8 air mi NE of Wheatland; ca 11.5 air mi SSW of Guernsey.
-104.8234
42.112
1362
1378
Sandy plains with sagebrush below cobblestone slopes. Phenology: flowering & fruiting.
RM
RM
600184
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
38098
Ronald L. Hartman
1993
6
23
174
U.S.A.
Wyoming
Natrona
Southern Powder River Basin/Southeastern Plains: Southern Powder River Basin: Emigrant Gap Ridge, ca 12 air mi W of Casper.
-106.5578
42.8533
1691
1701
Sandy and shaly areas with ponderosa pine on ridges. Phenology: fruiting.
RM
RM
603805
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
38162
Ronald L. Hartman
1993
6
23
174
U.S.A.
Wyoming
Natrona
Southern Powder River Basin/Southeastern Plains: Southern Powder River Basin: Poison Spider Oil Field, ca 24 air mi W of Casper.
-106.7752
42.8615
1737
1798
Sandy slopes and flats with sandstone outcrops in uplands with ponderosa pine. Phenology: fruiting.
RM
RM
603806
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
38279
Ronald L. Hartman
1993
6
24
175
U.S.A.
Wyoming
Natrona
Southern Powder River Basin/Southeastern Plains: Southern Powder River Basin: Blue Canyon at south end of Pine Mountain, ca 28 air mi WNW of Casper.
-106.85833
42.91583
1753
1798
Sandstone outcrop and sandy slopes with areas of shale. Phenology: fruiting.
RM
RM
603807
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
38335
Ronald L. Hartman
1993
6
24
175
U.S.A.
Wyoming
Natrona
Southern Powder River Basin/Southeastern Plains: Southern Powder River Basin: ca 3 air mi SSE of Powder River and ca 1 air mi NW of Middle Fork Casper Creek crossing.
-106.97722
42.98972
1795
1801
Sandy plains and white sandstone monuments. Phenology: fruiting.
RM
RM
600159
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
38464
Ronald L. Hartman
1993
6
26
177
U.S.A.
Wyoming
Natrona
Southern Powder River Basin/Southeastern Plains: Southern Powder River Basin: Wyo Hwy 253, ca 9 air mi SE of Casper.
-106.143
42.7612
1652
Wide right-of-way with road cut and relatively undistrubed grasslands along fence and drainage with cottonwood and willow. Phenology: fruiting.
RM
RM
600160
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
38568
Ronald L. Hartman
1993
6
26
177
U.S.A.
Wyoming
Natrona
Southern Powder River Basin/Southeastern Plains: Southern Powder River Basin: U.S. Hwy 20, 26, 87, ca 8 air mi E of Casper.
-106.1701
42.8501
1585
1600
Sandstone outcrops, sandy slopes and grassland. Phenology: fruiting.
RM
RM
600161
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
38588
Ronald L. Hartman
1993
6
27
178
U.S.A.
Wyoming
Converse
[location and coordinates withheld]
1579
1588
Old roadcut with original grasslands along fences in sandy soil. Phenology: fruiting.
RM
RM
600162
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
38694
Ronald L. Hartman
1993
6
27
178
U.S.A.
Wyoming
Converse
[location and coordinates withheld]
1585
Breaks and sandy plains and slope in grassland with patches of sagebrush. Phenology: fruiting.
RM
RM
600163
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
38813
Ronald L. Hartman
1993
6
27
178
U.S.A.
Wyoming
Converse
Southern Powder River Basin/Southeastern Plains: Southern Powder River Basin: Wyoming Game and Fish Access area along the North Platte River in vicinity of Carey, ca 10 air mi E of Glenrock.
-105.6681
42.8568
1502
River margin and sandy flats and slopes. Phenology: fruiting.
RM
RM
600164
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
38928
Ronald L. Hartman
1993
6
29
180
U.S.A.
Wyoming
Converse
Southern Powder River Basin/Southeastern Plains: Southern Powder River Basin: ca 0.5 air mi NW of Ayres Natural Bridge campground.
-105.6199
42.7383
1615
1646
Road cut and plains along fence. Phenology: flowering & fruiting.
RM
RM
600165
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
39153
Ronald L. Hartman
1993
6
29
180
U.S.A.
Wyoming
Converse
Southern Powder River Basin/Southeastern Plains: Southeastern Plains: Warm Springs Hill, ca 7 air mi S of Douglas.
-105.3914
42.6569
1493
1554
Redbeds with strata of anhydrous gypsum; juniper woodland and grassland. Phenology: fruiting.
RM
RM
600166
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
39169
Ronald L. Hartman
1993
6
29
180
U.S.A.
Wyoming
Albany
Southern Powder River Basin/Southeastern Plains: Southeastern Plains: ca 3 air mi E of Esterbrook.
-105.3142
42.4103
1615
1692
Sandy slope and plains with grassland and occasional ponderosa pine. Phenology: fruiting.
RM
RM
600167
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
39485
Ronald L. Hartman
1993
7
1
182
U.S.A.
Wyoming
Platte
[location and coordinates withheld]
1493
1524
Limestone outcrops and calcareous grasslands with juniper. Phenology: fruiting.
RM
RM
600168
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
39612
Ronald L. Hartman
1993
7
1
182
U.S.A.
Wyoming
Platte
[location and coordinates withheld]
1524
1615
Sandstone outcrops and sandy slopes; ponderosa pine and grasslands. Phenology: fruiting.
RM
RM
600169
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
39838
Ronald L. Hartman
1993
7
4
185
U.S.A.
Wyoming
Platte
Southern Powder River Basin/Southeastern Plains: Southeastern Plains: ca 7 air mi E of Albany County.
-105.1361
41.9094
1600
Sandy slopes. Phenology: fruiting.
RM
RM
600170
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
40264
Ronald L. Hartman T. W. Nelson
1993
7
6
187
U.S.A.
Wyoming
Natrona
Southern Powder River Basin/Southeastern Plains: Southern Powder River Basin: ca 1.2 air mi NNW of Waltman.
-107.2133
43.0908
1899
Sandy draw and slopes. Phenology: fruiting.
RM
RM
600171
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
40492
Ronald L. Hartman Thomas W. Nelson
1993
7
6
187
U.S.A.
Wyoming
Natrona
Southern Powder River Basin/Southeastern Plains: Southern Powder River Basin: ca 10 air mi SW of Waltman along Powder River.
-107.3494
42.9483
1951
Sandy slopes and sandstone outcrop with juniper. Phenology: fruiting.
RM
RM
600172
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
40596
Ronald L. Hartman
1993
7
11
192
U.S.A.
Wyoming
Albany
Southern Powder River Basin/Southeastern Plains: Southeastern Plains: Wyo Hwy 34, ca 1.5 air mi W of Platte County.
-105.3014
41.7931
1768
1798
Sandstone/metamorphic outcrops. Phenology: fruiting.
RM
RM
600173
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
40872
Ronald L. Hartman
1993
7
11
192
U.S.A.
Wyoming
Platte
[location and coordinates withheld]
1707
Sandy plains and road cuts. Phenology: fruiting.
RM
RM
614701
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
43693
Ronald L. Hartman
1993
8
4
216
U.S.A.
Wyoming
Sublette
Upper Green River Basin: Cretaceous Mountain/Hogsback Ridge Area: ca 0.5 air mi S of southern end of Cretaceous Mountain, ca 14 air mi SW of Big Piney.
-110.3161
42.3983
2469
2500
Hilltop with sagebrush slopes and semi-barren areas on ridges. Phenology: fruiting.
RM
RM
630031
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
45032
Ronald L. Hartman Tom Cramer
1994
5
21
141
U.S.A.
Wyoming
Sublette
Green River Basin: Stewart Point, ca 4 air mi SW of Pinedale.
-109.89
42.8297
2225
2362
Sagebrush slopes, dry stream channels, eroded, often barren slopes, windswept ridge and ravines with assorted shrubs. Phenology: flowering.
RM
RM
608688
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
45492
Ronald L. Hartman Tom Cramer and Charmaine Refsdal
1994
5
26
146
U.S.A.
Wyoming
Lincoln
Southern Salt River Range and Vicinity: Hams Fork Plateau: Schuster Basin, ca 14 air mi NW of Kemmerer.
-110.7378
41.9294
2256
2378
Sagebrush slopes, steep calcareous outcrops on slumped slopes, and aspen woodlands. Phenology: flowering.
RM
RM
608687
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
45646
Ronald L. Hartman Tom Cramer
1994
5
28
148
U.S.A.
Wyoming
Lincoln
Southern Salt River Range and Vicinity: Wheat Creek to Windy Gap and Oyster Ridge, ca 14 air mi N of Kemmerer.
-110.505
41.9878
2256
2439
Sagebrush slopes, sandstone and limestone outcrops, cushion plant communities on ridge, wet draws, and stream margins. Phenology: flowering.
RM
RM
665917
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
5577
Amy J. Roderick
1998
6
27
178
U.S.A.
Wyoming
Natrona
[location and coordinates withheld]
1768
1890
Draws and granite slopes of ponderosa pine, sagebrush, and snowberry. Phenology: fruiting.
RM
RM
630079
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
111
Thomas Cramer
1994
6
7
158
U.S.A.
Wyoming
Sublette
Green River Basin: east side of Elk Mountain, ca 2.5 air mi W of Elkhorn Junction.
-109.2853
42.4247
2164
2403
Sagebrush flats, slopes, and windswept hill tops. Phenology: flowering.
RM
RM
630073
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
1568
Thomas Cramer Jane T. Kellett
1994
7
3
184
U.S.A.
Wyoming
Sublette
Green River Basin: New Fork River, ca 4.5 air mi S of Boulder.
-109.7411
42.685
2118
Riverside meadows and cottonwood/willows with adjacent sagebrush. Phenology: flowering.
RM
RM
630033
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
1802
Thomas Cramer Jane T. Kellett
1994
7
7
188
U.S.A.
Wyoming
Fremont
Green River Basin: hill W of West Pacific Creek, ca 14 air mi SW of South Pass City.
-108.9728
42.3431
2195
2314
Sagebrush hillside, windswept tops, and badlands. Phenology: flowering.
RM
RM
630032
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
1897
Thomas Cramer Jane T. Kellett
1994
7
11
192
U.S.A.
Wyoming
Sublette
Green River Basin: East Fork River, ca 6 air mi E of Boulder.
-109.6081
42.7422
2134
Riverside meadows, willows, and mudflats. Phenology: fruiting.
RM
RM
630078
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
535
Thomas Cramer
1994
6
14
165
U.S.A.
Wyoming
Sublette
Green River Basin: Scab Creek Campground, ca 10 air mi NE of Boulder.
-109.5536
42.8294
2500
2560
Aspen hillside. Phenology: flowering.
RM
RM
639933
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
5477
Thomas Cramer
1995
6
3
154
U.S.A.
Wyoming
Lincoln
Green River Basin: ca 5.3 air mi W of Fontenelle Dam.
-110.1646
42.0157
2088
Sagebrush draw. Phenology: flowering.
RM
RM
639908
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
5884
Thomas Cramer
1995
6
11
162
U.S.A.
Wyoming
Sublette
Green River Basin: Mount Airy, ca 4 air mi WSW of Pinedale.
-109.9285
42.8451
2240
Sagebrush at edge of eroded gully. Phenology: flowering.
RM
RM
630077
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
600
Thomas Cramer
1994
6
16
167
U.S.A.
Wyoming
Fremont
Green River Basin: Continental Divide at Sweetwater River and Palmer Draw, ca 10 air mi W of South Pass City.
-108.9744
42.4125
2317
2435
Streamside, Douglas fir canyonside, sagebrush slopes, and open rocky ridges. Phenology: flowering & fruiting.
RM
RM
639907
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
6120
Thomas Cramer Jane T. Kellett
1995
6
16
167
U.S.A.
Wyoming
Sublette
Green River Basin: ca 4 air mi N of Pinedale.
-109.8499
42.9177
2286
2347
Sagebrush draws and hillsides with scattered large boulders. Phenology: flowering.
RM
RM
639727
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
6574
Thomas Cramer Jane T. Kellett
1995
6
21
172
U.S.A.
Wyoming
Lincoln
Green River Basin: ca 15.5 air mi SSW of La Barge.
-110.3191
42.0603
2103
Sandy sagebrush draw down from hill. Phenology: flowering & fruiting.
RM
RM
639724
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
6680
Thomas Cramer Jane T. Kellett
1995
6
21
172
U.S.A.
Wyoming
Lincoln
Green River Basin: Slate Creek Butte, ca 5 air mi SW of Fontenelle Dam.
-110.0873
41.9711
2027
Sand and cobblestone sagebrush draw off of butte. Phenology: flowering & fruiting.
RM
RM
639906
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
6869
Thomas Cramer Jane T. Kellett
1995
6
23
174
U.S.A.
Wyoming
Sublette
Green River Basin: ca 20 air mi NE of Farson.
-109.1873
42.3741
2225
Sagebrush hillside and draws. Phenology: flowering.
RM
RM
630076
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
694
Thomas Cramer
1994
6
16
167
U.S.A.
Wyoming
Sublette
Green River Basin: southern end on the east side of the Prospect Mountains, ca 17 air mi W of South Pass City.
-109.1344
42.4547
2393
2621
Sagebrush slopes and hills, open rocky ridges, aspen groves, and pine stands. Phenology: flowering.
RM
RM
639905
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
7109
Thomas Cramer
1995
7
4
185
U.S.A.
Wyoming
Lincoln
Green River Basin: ca 13.5 air mi NE of Kemmerer.
-110.4157
41.9413
2103
2118
Sagebrush and Atriplex flats at the base of a mesa. Phenology: fruiting.
RM
RM
639904
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
7207
Thomas Cramer
1995
7
5
186
U.S.A.
Wyoming
Lincoln
Green River Basin: south end of Slate Creek Ridge, ca 11.5 air mi NNE of Kemmerer.
-110.4544
41.9413
2164
2286
Wet meadow draw with sagebrush sides and shrub islands. Phenology: flowering & fruiting.
RM
RM
630075
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
813
Thomas Cramer
1994
6
18
169
U.S.A.
Wyoming
Sublette
Green River Basin: Boulder Creek, ca 3.5 air mi N of Boulder.
-109.7322
42.8008
2134
2210
Creekside and sagebrush slopes. Phenology: fruiting.
RM
RM
630074
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
908
Thomas Cramer
1994
6
20
171
U.S.A.
Wyoming
Sublette
Green River Basin: Big Sandy River, ca 18 air mi N of Farson.
-109.5175
42.3569
2079
Riverbank. Phenology: flowering.
RM
RM
639903
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
9176
Thomas Cramer Jane T. Kellett
1995
7
23
204
U.S.A.
Wyoming
Sublette
Green River Basin: Water Hole Draw at Big Sandy River, ca 23.5 air mi N of Farson.
-109.4509
42.4532
2103
Riverside meadows and willows. Phenology: flowering.
RM
RM
664682
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
30245
B. E. Nelson
1994
5
17
137
U.S.A.
Wyoming
Weston
Southern Powder River Basin/Southeastern Plains: Southern Powder River Basin: along Cheyenne River Road N of The Nose on the Cheyenne River, ca 3 air mi E of Hampshire; ca 31 air mi SW of Newcastle.
-104.6322
43.5716
1262
1274
Bluffs along the river with sandy soil and sandstone above, clay on the slopes and below. Phenology: flowering & fruiting.
RM
RM
664681
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
30276
B. E. Nelson
1994
5
17
137
U.S.A.
Wyoming
Weston
Southern Powder River Basin/Southeastern Plains: Southern Powder River Basin: above a draw leading into South Fork Lone Tree Creek, off Grieves Road, ca 20.5 air mi SW of Newcastle.
-104.5524
43.7132
1280
1301
Rolling grassland plains with sandstone outcrops, buttes, and ridges. Phenology: flowering.
RM
RM
664680
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
30290
B. E. Nelson
1994
5
17
137
U.S.A.
Wyoming
Weston
Southern Powder River Basin/Southeastern Plains: Southern Powder River Basin: butte N of Mush Creek off Mush Creek Road, ca 13 air mi WSW of Newcastle.
-104.4327
43.7982
1225
1268
Steep clay slopes with scattered pieces of sandstone. Phenology: flowering & fruiting.
RM
RM
664679
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
30314
B. E. Nelson
1994
5
17
137
U.S.A.
Wyoming
Weston
Southern Powder River Basin/Southeastern Plains: Southern Powder River Basin: along Roxson Road ca 1/2-3/4 mi N of Weston County, ca 3.3 air mi WSW of Morisey; ca 28.5 air mi SW of Newcastle.
-104.4527
43.515
1256
1292
Rolling dissected plain of sagebrush-grassland and sedge-grassland mosaic. Phenology: flowering.
RM
RM
267123
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
763
C. L. Gilly G. W. Parmelee, Stella M. Wilson and P. G. Coleman.
1953
6
24
175
U.S.A.
Wyoming
Crook
Along Cement Ridge, about halfway between the Wyoming-South Dakota boundary and the fire lookout tower.
-104.0622
44.3442
1981
Phenology: flowering & fruiting.
RM
RM
393317
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
57-212
C. S. Gilbert H. F. Eppson
1957
7
3
184
U.S.A.
Wyoming
Crook
Kaiser Ranch near Sundance.
-104.3922
44.3902
1487
Phenology: fruiting.
RM
RM
110638
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
2145
Herman E. Hayward
1927
7
14
195
U.S.A.
Wyoming
Crook
Inyan Kara Creek, 17 mi S of Sundance.
-104.2644
44.1979
1591
Foothills; grass association; xerophytic. Phenology: fruiting.
RM
RM
378155
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
2161
Hollis Marriott
1983
5
23
143
U.S.A.
Wyoming
Crook
[location and coordinates withheld]
1219
South and east facing grassy slopes. Phenology: flowering.
RM
RM
378154
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
2220
Hollis Marriott
1983
5
23
143
U.S.A.
Wyoming
Crook
Black Hills: Seely-Alzada Hwy, upper Boggy Creek; ca 10.5 air mi NE of Seely.
-104.4647
44.917
1158
Grassland with sagebrush; Skull Creek shale. Phenology: flowering.
RM
RM
378153
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
2255
Hollis Marriott
1983
5
23
143
U.S.A.
Wyoming
Crook
Black Hills: Little Missouri River Valley ca 8.5 air mi N of Seely.
-104.65
44.9308
1097
Sagebrush-grassland on Skull Creek shale. Phenology: buds.
RM
RM
378152
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
2291
Hollis Marriott
1983
5
24
144
U.S.A.
Wyoming
Crook
Black Hills: Bear Lodge Mountains, East Fork Blacktail Creek; ca 9.5 air mi SE of Hulett.
-104.4678
44.581
1432
South and east facing slopes below sandstone cliffs with scattered pines. Phenology: flowering.
RM
RM
378151
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
2402
Hollis Marriott
1983
5
27
147
U.S.A.
Wyoming
Crook
Black Hills: (Snider Ranch), upper Corral Creek drainage ca 14 air mi W of Sundance.
-104.64861
44.4203
1371
Open, grassy south and east facing slopes. Phenology: flowering.
RM
RM
378150
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
2463
Hollis Marriott
1983
5
31
151
U.S.A.
Wyoming
Crook
Black Hills: The Brakes, ca 2.8 air mi SSE of Aladdin.
-104.1389
44.6272
1128
Open, grassy ridge top; sandy soil. Phenology: flowering.
RM
RM
378149
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
2531
Hollis Marriott
1983
5
31
151
U.S.A.
Wyoming
Crook
[location and coordinates withheld]
1250
Pine forest, N and W facing slopes. Phenology: flowering.
RM
RM
378148
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
2636
Hollis Marriott
1983
6
6
157
U.S.A.
Wyoming
Crook
Black Hills: Government Valley, ca 8 air mi NNE of Sundance.
-104.3289
44.52361
1402
Grassland on red shale soil. Phenology: flowering.
RM
RM
378147
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
2738
Hollis Marriott
1983
6
7
158
U.S.A.
Wyoming
Crook
[location and coordinates withheld]
1097
Grassy slopes below quarry. Phenology: flowering & fruiting.
RM
RM
378146
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
2795
Hollis Marriott
1983
6
10
161
U.S.A.
Wyoming
Crook
[location and coordinates withheld]
1128
Grassy south and east-facing slopes and ridge top. Phenology: flowering & fruiting.
RM
RM
378145
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
3071
Hollis Marriott
1983
6
15
166
U.S.A.
Wyoming
Crook
[location and coordinates withheld]
1310
Grassland. Phenology: flowering & fruiting.
RM
RM
378144
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
3174
Hollis Marriott
1983
6
15
166
U.S.A.
Wyoming
Crook
[location and coordinates withheld]
1371
Grassland. Phenology: flowering.
RM
RM
378143
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
3326
Hollis Marriott
1983
6
21
172
U.S.A.
Wyoming
Crook
Black Hills: Bear Lodge Mountains: Lytle Creek and Newton Hill, ca 8.5 air mi ESE of Devils Tower.
-104.54861
44.55083
1402
Pine-oak forest with many openings (logged). Phenology: fruiting.
RM
RM
378142
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
3576
Hollis Marriott
1983
6
24
175
U.S.A.
Wyoming
Crook
[location and coordinates withheld]
1524
Grassland; south, east, and northeast-facing slopes. Phenology: fruiting.
RM
RM
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
202
Brian Elliott
1998
5
25
145
U.S.A.
Colorado
Huerfano
Wet Mountains, Wet Mountain Valley, Sangre de Cristo Range, and Vicinity: County Road 520, 5.5 road mi S of Colo Hwy 69.
-105.0024
37.6531
2134
A small hill with pinyon-juniper. Phenology: flowering.
RM
RM
378141
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
6122
Hollis Marriott
1984
5
16
137
U.S.A.
Wyoming
Weston
Black Hills: U.S. Hwy 16 just W of South Dakota, ca 9.5 air mi SE of Newcastle.
-104.0497
43.763
1371
Mountain mahogany scrub on ridgetop and northeast facing slope, rocky soil (Minnekahta limestone). Phenology: fruiting.
RM
RM
378140
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
6178
Hollis Marriott
1984
5
16
137
U.S.A.
Wyoming
Weston
[location and coordinates withheld]
1219
Ponderosa pine forest on sandstone ridge W of canyon; grassy opening. Phenology: fruiting.
RM
RM
335820
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
621
Hollis Marriott
1981
4
29
119
U.S.A.
Wyoming
Crook
Devils Tower National Monument: south side of Fossil Hill.
-104.7209
44.5959
1280
Common on loose sandy-silty soil on open south slope with Phlox hoodii, Andropogon scoparius. Phenology: flowering.
RM
RM
378139
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
6290
Hollis Marriott
1984
5
25
146
U.S.A.
Wyoming
Weston
Black Hills: W of Wyo Hwy 116; ca 4 air mi NNE of Upton.
-104.60417
44.1717
1402
Sagebrush grassland with scattered pines and junipers (grazed). Phenology: flowering.
RM
RM
378138
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
6339
Hollis Marriott
1984
5
25
146
U.S.A.
Wyoming
Weston
Black Hills: Spring Creek just N of WY Hwy 116 and S of Pfeiffer Hill; ca 10 air mi SSW of Sundance.
-104.42667
44.2456
1432
Grassland. Phenology: flowering.
RM
RM
378137
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
6371
Hollis Marriott
1984
5
28
149
U.S.A.
Wyoming
Crook
Black Hills: Cold Springs Creek near Plato Gulch; ca 10 air mi ESE of Sundance.
-104.1833
44.3667
1493
Grassy openings in ponderosa pine forest. Phenology: flowering.
RM
RM
378136
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
6429
Hollis Marriott
1984
5
28
149
U.S.A.
Wyoming
Crook
[location and coordinates withheld]
1554
Grassland on E side (ski area). Phenology: flowering.
RM
RM
378135
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
6499
Hollis Marriott
1984
6
4
156
U.S.A.
Wyoming
Weston
Black Hills: Stockade Beaver Creek drainage between Sherwood and Sheldon Canyons; ca 6 air mi ENE of Newcastle.
-104.08583
43.87889
1432
Grassland (grazed) in bottom of draw above spring. Phenology: flowering & fruiting.
RM
RM
378134
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
6535
Hollis Marriott
1984
6
7
159
U.S.A.
Wyoming
Crook
Black Hills: Cabin Creek SSW of Cedar Hill; ca 8.5 air mi WSW of Devils Tower.
-104.8722
44.52
1250
Big sagebrush-grassland with occasional junipers, on Skull Creek shale. Phenology: flowering & fruiting.
RM
RM
378133
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
6570
Hollis Marriott
1984
6
7
159
U.S.A.
Wyoming
Crook
[location and coordinates withheld]
1341
Sagebrush-grassland on top of divide. Phenology: flowering & fruiting.
RM
RM
378132
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
6688
Hollis Marriott
1984
6
12
164
U.S.A.
Wyoming
Weston
[location and coordinates withheld]
1432
Grassland in canyon bottom. Phenology: flowering & fruiting.
RM
RM
378131
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
6872
Hollis Marriott
1984
6
19
171
U.S.A.
Wyoming
Crook
Black Hills: Inyan Kara Mountain (east half).
-104.3447
44.2164
1646
Grassy east facing slope on outer mountain. Phenology: flowering & fruiting.
RM
RM
378130
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
6980
Hollis Marriott
1984
6
21
173
U.S.A.
Wyoming
Crook
Black Hills: Black Buttes: unnamed butte E of Iron Mountain, ca 9.5 air mi SE of Sundance.
-104.2633
44.29056
1768
Grassland on top of butte, rocky (igneous) soil. Phenology: flowering.
RM
RM
378129
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
7322
Hollis Marriott
1984
6
27
179
U.S.A.
Wyoming
Weston
[location and coordinates withheld]
1371
Pine forest on northwest-facing slope. Phenology: flowering & fruiting.
RM
RM
327256
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
1268
Keith H. Dueholm Ronald L. Hartman
1978
5
23
143
U.S.A.
Wyoming
Crook
Powder River Basin: W of Belle Fourche River, ca 1 road mi S of U.S. Hwy 16.
-104.9931
44.2708
1250
Dry sagebrush plains. Phenology: flowering.
RM
RM
327259
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
1317
Keith H. Dueholm Ronald L. Hartman
1978
5
24
144
U.S.A.
Wyoming
Crook
Powder River Basin: 6 road mi S of Stroner.
-105.0142
44.69222
1250
Rolling plains. Phenology: flowering.
RM
RM
327251
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
2291
Keith H. Dueholm Ronald L. Hartman and Mary Alice Sanguinetti.
1978
6
20
171
U.S.A.
Wyoming
Weston
Powder River Basin: along Cheyenne River; ca 6 air mi SE of Rochelle.
-104.8863
43.5038
1280
Floodplain, greasewood flats; flats. Phenology: fruiting.
RM
USFS
402630
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
55
Louis Knowles
1913
6
1
152
U.S.A.
Wyoming
Crook
Black Hills (Sundance) National Forest.
-104.399
44.5943
1371
Loam soil. Phenology: flowering & fruiting.
RM
RM
143399
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
607
Marion Ownbey
1935
5
30
150
U.S.A.
Wyoming
Crook
1/2 mi SW of Hulett.
-104.604
44.6678
1158
Loose soil. Phenology: flowering.
RM
RM
304697
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
E-56
Ronald G. Schreibeis
1976
5
19
140
U.S.A.
Wyoming
Weston
22-23 mi SSE of Newcastle.
-104.0726
43.5443
Understory of open ponderosa pine stand. Phenology: flowering.
RM
RM
378128
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
18092
Ronald L. Hartman
1984
7
13
195
U.S.A.
Wyoming
Crook
Black Hills: Buckley Canyon, ca 10.5 air mi SE of Sundance.
-104.2225
44.30472
1615
Wooded ridge (Pinus ponderosa) with sandstone outcrops, sandy slopes, and meadow; meadow. Phenology: fruiting.
RM
RM
378127
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
18467
Ronald L. Hartman
1984
7
17
199
U.S.A.
Wyoming
Crook
Black Hills: lower slopes of Hooker Peak and plains to the NW, 7-8 air mi SSE of Sundance.
-104.3044
44.3197
1554
Plains, Pinus ponderosa wooded slopes, moist open drainages and stock pond; moist drainage. Phenology: fruiting.
RM
RM
665928
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
5791
Amy J. Roderick
1998
7
6
187
U.S.A.
Wyoming
Carbon
Upper North Platte and Laramie River Drainages: Bible Rock S of County Road 320, ca 9.2 air mi S of Medicine Bow townsite.
-106.1781
41.7621
1835
2207
Sagebrush-grassland leading into north-facing slope of mountain mahogany and snowberry. Phenology: fruiting.
RM
RM
327257
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
5382
Ronald L. Hartman Keith Dueholm
1978
5
24
144
U.S.A.
Wyoming
Crook
Powder River Basin: ca 7 road mi S of Stroner.
-105.0142
44.67778
1280
Rocky slopes of hill and surrounding plains; rocky slopes. Phenology: flowering.
RM
RM
327258
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
5414
Ronald L. Hartman Keith Dueholm
1978
5
24
144
U.S.A.
Wyoming
Crook
Powder River Basin: ca 1 mi NW of Lightning Flats.
-105.0631
44.989
1280
Broad ridge covered with ponderosa pine with valleys containing Fraxinus, Amelanchior, and Prunus; open slope. Phenology: flowering.
RM
RM
327238
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
6759
Ronald L. Hartman Keith H. Dueholm and Mary Alice Sanguinetti
1978
6
20
171
U.S.A.
Wyoming
Weston
Powder River Basin: ca 4 air mi SSE of Rochelle.
-104.9461
43.5466
1280
Ridge and slopes. Phenology: fruiting.
RM
RM
378126
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
97
William Latady
1984
6
8
160
U.S.A.
Wyoming
Crook
Black Hills: Keyhole Reservoir, McKean site.
-104.8317
44.3592
1280
Pine ridge. Phenology: flowering & fruiting.
RM
RM
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
273
Brian Elliott
1998
5
25
145
U.S.A.
Colorado
Las Animas
Wet Mountains, Wet Mountain Valley, Sangre de Cristo Range, and Vicinity: at base of TV Hill, ca 1.5 mi N on County Road 63.1 from Exit 30 on I-25.
-104.6194
37.3908
1935
Pinyon-juniper/prairie transition. Phenology: flowering & fruiting.
RM
RM
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
74183
B. E. Nelson
2008
6
13
165
U.S.A.
Montana
Carbon
Pryor Mountains: on Red Pryor or BLM Road 1022 ca 3 air mi S of Red Pryor Mountain summit, ca 29 air mi SE of Bridger.
-108.4368
45.0752
1890
2012
Burn in open Douglas fir/limber pine woods or juniper woodland dominated by Bromus tectorum. Phenology: flowering.
RM
RM
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
74253
B. E. Nelson
2008
6
16
168
U.S.A.
Montana
Carbon
Pryor Mountains: Pryor Mountain National Wild Horse Range: on Burnt Timber or BLM Road 1018, ca 1.5 air E mi of Crooked Creek, ca 33 air mi SE of Bridger.
-108.357
45.0425
1512
1548
Sandstone-limestone pavement with sandy areas and adjacent rocky slopes. Phenology: fruiting.
RM
RM
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
74307
B. E. Nelson
2008
6
16
168
U.S.A.
Montana
Carbon
Pryor Mountains: Pryor Mountain National Wild Horse Range: on Sykes Ridge or BLM Road 1019 at the state line, ca 37 air mi SE of Bridger.
-108.2925
45.0145
1414
1439
Mountain mahogany shrubland with scattered juniper on sandstone-limestone pavement with sandy areas. Phenology: fruiting.
RM
USFS
883600
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
74386
B. E. Nelson
2008
6
18
170
U.S.A.
Montana
Carbon
Pryor Mountains: Custer National Forest: on Commissary Ridge ca 3/4 air mi E of Crooked Creek, ca 28 air mi SE of Bridger.
-108.4123
45.1334
2012
2088
Easterly-facing lee slope with sagebrush. Phenology: flowering.
RM
USFS
883601
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
74446
B. E. Nelson
2008
6
19
171
U.S.A.
Montana
Carbon
Pryor Mountains: Custer National Forest: red hill just N of Sage Creek near the junction of Forest Road 2144 and O/C (Circle Slash C) Ranch drive, ca 22.5 air mi ESE of Bridger.
-108.4842
45.2046
1853
1978
Red clay outwash slopes below steep red slopes and low cliffs. Phenology: flowering.
RM
RM
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
74501
B. E. Nelson
2008
6
22
174
U.S.A.
Montana
Carbon
Bighorn Basin: mouth of Inferno Canyon at the west base of the Pryor Mountains, ca 2 air mi E of Rail Bed Road, ca 18 air mi SE of Bridger.
-108.6436
45.1376
1487
1530
Stony western wheatgrass/black sagebrush flats. Phenology: fruiting.
RM
RM
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
74548
B. E. Nelson
2008
6
22
174
U.S.A.
Montana
Carbon
Pryor Mountains: Bear Canyon and vicinity, ca 25 air mi SE of Bridger.
-108.5258
45.0861
1634
1701
Rolling slopes on limestone with Utah juniper and sagebrush. Phenology: fruiting.
RM
RM
883602
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
75273
B. E. Nelson
2008
7
17
199
U.S.A.
Montana
Carbon
Pryor Mountains: Custer National Forest: north rim of the mountains at the west end, ca 9 air mi N of Warren; ca 16 air mi SE of Bridger.
-108.6255
45.1919
1981
2073
Moist area below low cliff with limber pine and sagebrush. Phenology: fruiting.
RM
RM
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
75555
B. E. Nelson
2008
7
21
203
U.S.A.
Montana
Carbon
Pryor Mountains: on the southeast end of East Pryor Mountain on ridge between head of Lost Water and Layout creeks, ca 30 air mi ESE of Bridger.
-108.3335
45.1636
2621
2652
Semi-barren rocky slope. Phenology: flowering.
RM
USFS
883604
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
75585
B. E. Nelson
2008
7
21
203
U.S.A.
Montana
Carbon
Pryor Mountains: Custer National Forest: above and E of Lost Water Canyon near Little Ice Cave, ca 31 air mi ESE of Bridger.
-108.3384
45.1364
2487
2512
Rocky limber pine/forb savanna. Phenology: flowering.
RM
USFS
883603
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
75694
B. E. Nelson
2008
7
24
206
U.S.A.
Montana
Carbon
Pryor Mountains: Custer National Forest: Red Pryor Mountain, southeast shoulder, steep slope below the rim to the E, ca 26 air mi SE of Bridger.
-108.4489
45.1162
2519
2580
Limber pine/spruce grove on southwest-facing ridge slope. Phenology: flowering & fruiting.
RM
USFS
883599
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
74018
B. E. Nelson
2008
6
10
162
U.S.A.
Montana
Carbon
Pryor Mountains: Custer National Forest: E of Sage Creek at the forest-Crow Indian Reservation boundary, ca 19 air mi ESE of Bridger.
-108.5729
45.2175
1652
1743
Meadow and sagebrush patch. Phenology: flowering.
RM
RM
665927
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
5952
Amy J. Roderick
1998
7
7
188
U.S.A.
Wyoming
Carbon
Upper North Platte and Laramie River Drainages: Shirley Basin: County Road 2, ca 4 air mi NE of Shirley Basin townsite; ca 2.7 air mi W of Albany County.
-106.1309
42.3252
2179
2210
Red, sandy draw. Phenology: fruiting.
RM
RM
665926
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
5984
Amy J. Roderick
1998
7
7
188
U.S.A.
Wyoming
Natrona
Upper North Platte and Laramie River Drainages: Dugway Rim S of old Casper-Medicine Bow Road, ca 10.5 air mi NE of Shirley Basin townsite.
-106.1183
42.4383
2286
2347
Gravelly south-facing draw; sagebrush, snowberry, fescue, and wild buckwheat common. Phenology: fruiting.
RM
RM
905429
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
71123
B. E. Nelson Emily Elliott, Brian Elliott
2007
5
24
144
U.S.A.
Wyoming
Park
Beartooth Mountains: Shoshone National Forest: Clarks Fork Canyon along Morrison Trail, ca 24-25 air mi NNW of Cody.
-109.3497
44.8131
1426
1439
Stony, gravelly canyon bottom near the river. Phenology: flowering.
RM
RM
905428
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
71202
B. E. Nelson Emily Elliott, Brian Elliott
2007
5
24
144
U.S.A.
Wyoming
Park
Beartooth Mountains: ca 1/4-3/4 air mi N of Clarks Fork Yellowstone River, ca 26.5 air mi NNW of Cody.
-109.298
44.8638
1378
1585
Sagebrush on redbeds and soil derived from them. Phenology: flowering.
RM
RM
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
59
Brian Elliott
1998
5
25
145
U.S.A.
Colorado
Pueblo
Wet Mountains, Wet Mountain Valley, Sangre de Cristo Range, and Vicinity: Greenhorn Road just S of Colo Hwy 165 over Greenhorn Creek.
-104.8527
37.933
1817
1829
By bridge; oak-pinyon and riparian. Phenology: flowering.
RM
USFS
865698
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
71400
B. E. Nelson
2007
5
29
149
U.S.A.
Montana
Carbon
Beartooth Mountains: Custer National Forest: along West Red Lodge Creek and ridge between West Red Lodge and East Fork West Red Lodge creeks, ca 3 air mi SSW of Luther; ca 11.5 air mi WNW of Red Lodge.
-109.5523
45.1681
1704
1762
Westerly-facing slope with scattered limber pine, Douglas fir, and ponderosa pine, with open gravelly patches. Phenology: flowering & fruiting.
RM
RM
869890
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
71505
B. E. Nelson
2007
5
31
151
U.S.A.
Montana
Park
Absaroka Range: Gallatin National Forest: along Boulder or Forest Road 6639 above the Boulder River, ca 1/3 mi S of Hicks Park, ca 2 air mi SE of Carbonate Mountain, ca 30.3 air mi SE of Livingston.
-110.2445
45.2859
1981
Park. Phenology: flowering.
RM
RM
869891
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
71591a
B. E. Nelson
2007
5
31
151
U.S.A.
Montana
Sweet Grass
Beartooth Mountains: Gallatin National Forest: at forest boundary on Forest Road 485 ca 3.5 air mi SE of Black Butte, ca 12.5 air mi S of Big Timber.
-109.9316
45.6512
1646
1768
Recently burned (2006) grassland with patches of Douglas fir or ponderosa pine. Phenology: flowering & fruiting.
RM
RM
905427
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
71721
B. E. Nelson Emily Elliott
2007
6
2
153
U.S.A.
Wyoming
Park
Beartooth Mountains: Shoshone National Forest: ridge S of Line Creek, ca 0.3-0.5 mi S of Montana, ca 37 air mi NNW of Cody.
-109.2972
44.9997
1844
2012
Slopes of decomposing granite or redbeds with limber pine and Douglas fir. Phenology: flowering.
RM
USFS
865699
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
71787
B. E. Nelson Emily Elliott
2007
6
2
153
U.S.A.
Montana
Carbon
Beartooth Mountains: Custer National Forest: along Robertson Draw at the intersection of Forest roads 2008 and 2009 ca 1-1.5 air mi N of Wyoming, ca 11.5 air mi S of Red Lodge.
-109.2578
45.0191
1926
2012
Gravelly, stony (granitic) slope in a burn. Phenology: flowering.
RM
USFS
865693
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
153
Emily Elliott Brian Elliott
2007
5
21
141
U.S.A.
Montana
Carbon
Beartooth Mountains: Custer National Forest: along Forest Road 2071 and Forest Road 21478 at intersection, ca 3 air mi SW of Red Lodge.
-109.3025
45.158
1890
2012
On south-facing slope, in an open meadow used as a horse pasture with sagebrush and into pine/Douglas fir. Phenology: flowering.
RM
USFS
865694
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
349
Emily Elliott B. E. Nelson and Brian Elliott
2007
5
27
147
U.S.A.
Montana
Carbon
Beartooth Mountains: Custer National Forest: just NE of Alpine at East Rosebud Lakes, ca 19 air mi W of Red Lodge.
-109.6363
45.2
1914
1963
Open forb meadow. Phenology: flowering.
RM
USFS
865695
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
357
Emily Elliott Brian Elliott and B. E. Nelson
2007
5
27
147
U.S.A.
Montana
Carbon
Beartooth Mountains: Custer National Forest: along East Rosebud Creek, ca 1 air mi NE of East Rosebud Lake, ca 18 air mi W of Red Lodge.
-109.6179
45.2236
1719
1731
Open forb meadow. Phenology: flowering.
RM
USFS
865696
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
459
Emily Elliott Brian Elliott and B. E. Nelson
2007
5
27
147
U.S.A.
Montana
Carbon
Beartooth Mountains: Custer National Forest: ca 3 air mi SSW of Roscoe; ca 16 air mi NW of Red Lodge.
-109.5162
45.3078
1646
1673
Rocky grassland with grazing by road. Phenology: flowering.
RM
USFS
865701
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
714
Emily Elliott
2007
5
31
151
U.S.A.
Montana
Stillwater
Beartooth Mountains: Custer National Forest: along Forest Road 2415, ca 28 air mi NW of Red Lodge.
-109.7388
45.3951
1798
1823
Old burned area with aspen and mixed confer forest at the edges onto an open slope. Phenology: flowering.
RM
USFS
865702
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
767
Emily Elliott
2007
5
31
151
U.S.A.
Montana
Stillwater
Beartooth Mountains: Custer National Forest: along Forest Road 2414, ca 2 air mi S of the forest boundary, ca 30 air mi NW of Red Lodge.
-109.7816
45.3869
2280
2329
Open slopes on red beds. Phenology: flowering.
RM
RM
939823
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
805
Emily Elliott Brian Elliott
2007
6
4
155
U.S.A.
Montana
Carbon
Cooney Reservoir along Red Lodge Creeek Road, on south side of reservoir W of dam, ca 18 air mi N of Red Lodge.
-109.2037
45.4444
1295
Slopes around reservoir with sandy soils in mixed Artemisia cana and annual weedy forbs/grasses. Phenology: flowering.
RM
RM
939824
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
877
Emily Elliott Brian Elliott
2007
6
4
155
U.S.A.
Montana
Stillwater
Beartooth Mountains: along Mont Hwy 420, ca 3/4 mi N of Beehive, ca 31 air mi NW of Red Lodge.
-109.718
45.4885
1426
1634
Volcanic tuft (ash substrate) cliffs and surrounding slopes dominated by annual weedy forbs with very few trees, area recently burned. Phenology: fruiting.
RM
RM
939825
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
1034
Emily Elliott Brian Elliott
2007
6
8
159
U.S.A.
Montana
Park
Absaroka Mountains: ca 3.5 air mi NNW of National Forest, ca 2 air mi E of Livingston.
-110.5249
45.6595
1432
Open cobbly hills dominated by low forbs. Phenology: flowering & fruiting.
RM
RM
869882
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
1152
Emily Elliott Brian Elliott
2007
6
8
159
U.S.A.
Montana
Park
Gallatin Mountains: Gallatin National Forest: along Forest Road 978, ca 14 air mi SW of Livingston.
-110.7625
45.5186
1780
2060
Steep south-facing open slope dominated by mixed grasses and forbs into outcrop of conglomerates and mixed conifer forest. Phenology: flowering & fruiting.
RM
RM
869883
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
1437
Emily Elliott Ronald L. Hartman
2007
6
11
162
U.S.A.
Montana
Gallatin
Gallatin Range: Gallatin National Forest: from 1/4 air mi W of Teepee Creek, towards summmit of Sunshine Point, ca 43 air mi S of Bozeman.
-111.1727
45.0626
2073
2408
Calcareous slopes and outcrops with open and wooded areas. Phenology: flowering.
RM
USFS
865703
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
1748
Emily Elliott
2007
6
15
166
U.S.A.
Montana
Carbon
Beartooth Mountains: Custer National Forest: up Forest Road 2071 around Wild Bill Lake, ca 6 air mi SW of Red Lodge.
-109.3688
45.1555
2048
2256
In mixed conifer forest and open meadow. Phenology: flowering.
RM
USFS
865704
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
1821
Emily Elliott
2007
6
15
166
U.S.A.
Montana
Carbon
Beartooth Mountains: Custer National Forest: along West Red Lodge Creek, ca 11.5 air mi NW of Red Lodge.
-109.4888
45.236
1780
2176
Mixed conifer forest into open meadows, along stream. Phenology: flowering.
RM
RM
869884
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
1967
Emily Elliott
2007
6
18
169
U.S.A.
Montana
Park
Gallatin Range: Gallatin National Forest: near Cinnabar Mountain, ca 40 air mi SSW of Livingston; ca 7.5 air mi NW of Gardinar.
-110.8143
45.1103
1646
1829
Open slopes and plateau dominated by sagebrush and mixed forbs on decomposing granite. Phenology: fruiting.
RM
RM
869885
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
2103
Emily Elliott
2007
6
18
169
U.S.A.
Montana
Park
Gallatin Range: Gallatin National Forest: along Big Creek or Forest Road 2500, ca 31 air mi SW of Livingston.
-110.9392
45.3046
1743
2012
Mixed conifer forest and open meadow. Phenology: flowering & fruiting.
RM
USFS
865705
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
2215
Emily Elliott
2007
7
2
183
U.S.A.
Montana
Carbon
Beartooth Mountains: Custer National Forest: along Forest Road 3010, ca 3 air mi WSW of Red Lodge.
-109.3087
45.1717
1926
2219
Open meadow. Phenology: fruiting.
RM
RM
869886
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
2345
Emily Elliott Ken Elliott
2007
7
4
185
U.S.A.
Montana
Park
Absaroka Range: Gallatin National Forest: along Forest Road 2532, ca 5 air mi SE of Livingston.
-110.5044
45.5994
1859
2097
Mixed conifer forest with moist understory and periodic small meadows. Phenology: fruiting.
RM
RM
905425
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
54561
Ronald L. Hartman
1996
6
10
162
U.S.A.
Wyoming
Park
Beartooth Mountains: Morrison Jeep Trail from bottom to top of switchbacks then SE ca 4 mi.
-109.359
44.7985
1829
3109
Rocky to grassy slopes. Phenology: flowering.
RM
USFS
865706
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
85480
Ronald L. Hartman
2007
6
14
165
U.S.A.
Montana
Stillwater
Beartooth Mountains: Custer National Forest: ca 4 air mi SW of Nye, along Stillwater River.
-109.8593
45.403
1490
Roadside park along the river and adjacent limestone outcrop. Phenology: fruiting.
RM
RM
939828
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
85654
Ronald L. Hartman
2007
6
15
166
U.S.A.
Montana
Stillwater
Beartooth Mountains: Beehive Rock and vicinity, 0.5-1 air mi N of Beehive.
-109.712
45.498
1490
1714
Limestone outcrops with slopes; area burned in forest fire in 2006; very motley mix of natives and exotics. Phenology: fruiting.
RM
RM
939829
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
85722
Ronald L. Hartman
2007
6
17
168
U.S.A.
Montana
Carbon
Water Birch Fishing Access on Rock Creek, ca 0.5 mi either way of center of access area.
-109.1933
45.3164
1477
Stream bottom and adjacent parking lot. Phenology: flowering & fruiting.
RM
RM
939830
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
85986
Ronald L. Hartman
2007
6
20
171
U.S.A.
Montana
Carbon
Horsethief Station Fishing Access, ca 3 air mi N of Red Lodge on Rock Creek.
-109.2296
45.2349
1600
Creek bottom and adjacent parking lot. Phenology: fruiting.
RM
RM
905430
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
38285
B. E. Nelson
1996
6
15
167
U.S.A.
Wyoming
Park
[location and coordinates withheld]
1500
1753
Fescue grassland or sagebrush grassland on stony slopes and ridges. Phenology: flowering.
RM
RM
920577
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
200
Laura E. Lukas
2007
6
10
161
U.S.A.
Wyoming
Albany
Laramie Plains: along Wyo Hwy 130, 1 mi W of the intersection of County Road 57 and Wyo Hwy 130, ca 16 mi W of Laramie; ca 13 mi E Centennial.
-105.8974
41.3054
2293
Dry hillsides and grazed plains. Phenology: flowering & fruiting.
RM
RM
920567
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
248
Laura E. Lukas
2007
6
10
161
U.S.A.
Wyoming
Albany
Medicine Bow Mountains: Sheep Mountain, along Johns Creek, W of former County Road 424, ca 23 mi W of Laramie; ca 6.5 mi SE of Centennial.
-106.022
41.2652
2459
Eastern slope, sagebrush-grassland. Phenology: flowering.
RM
RM
920575
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
546
Laura E. Lukas
2007
6
16
167
U.S.A.
Wyoming
Albany
Laramie Plains: between I-80 and County Road 57 (Dutton Creek Road), ca 20 mi NW of Laramie.
-105.9558
41.4249
2251
Very dry plains dominated by soil lichens. Phenology: flowering & fruiting.
RM
RM
920538
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
74684
B. E. Nelson
2008
7
6
188
U.S.A.
Wyoming
Carbon
Medicine Bow Mountains: Wick Brothers Wildlife Management Area: above and E of Wagonhound Creek and ca 1/2 to 3/4 air mi S of I-80, ca 7 air mi SE of town of Elk Mountain.
-106.2917
41.6305
2292
2353
Rocky clay slopes. Phenology: fruiting.
RM
RM
920574
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
4922
Laura E. Lukas
2008
6
9
161
U.S.A.
Wyoming
Albany
Medicine Bow Mountains: area between Centennial Work Center and Wyo Hwy 130, ca 1 air mi NW of Centennial.
-106.1561
41.3085
2594
2600
Sagebrush on southeast aspect. Phenology: flowering.
RM
RM
920573
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
5014
Laura E. Lukas
2008
6
16
168
U.S.A.
Wyoming
Albany
Medicine Bow Mountains: southwest foot of Sheep Mountain, just NE of County Road 47 (Fox Creek Road), ca 0.5 air mi SE of intersection of County Road 47 and Forest Road 517 (Dry Park Road), ca 26 air mi SW of Laramie; ca 9 air mi SE of Centennial.
-106.0715
41.1711
2462
2482
Sagebrush steppe. Phenology: flowering.
RM
RM
920572
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
5095
Laura E. Lukas
2008
6
18
170
U.S.A.
Wyoming
Carbon
Medicine Bow Mountains: southeast-facing hill, N of Forest Road 111, ca 1 1/4 air mi W of intersection of Forest Road 111 and I-80, ca 1.5 air mi W of Arlington.
-106.252
41.6013
2402
Sagebrush. Phenology: flowering.
RM
RM
920541
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
5183
Laura E. Lukas
2008
6
20
172
U.S.A.
Wyoming
Carbon
[location and coordinates withheld]
2207
Sagebrush near road. Phenology: flowering & fruiting.
RM
RM
920540
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
5396
Laura E. Lukas
2008
6
25
177
U.S.A.
Wyoming
Albany
Medicine Bow Mountains: southern Sheep Mountain, between miles 1 and 2 of Sheep Mountain Trail, ca 25 air mi SW of Laramie; ca 11 air mi SSE of Centennial.
-106.0326
41.1468
2481
Rocky grasslands with some sagebrush. Phenology: flowering & fruiting.
RM
RM
920539
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
5449
Laura E. Lukas
2008
6
27
179
U.S.A.
Wyoming
Albany
Laramie Plains: just W of County Road 34 (Sand Creek Road) and 1 mi S of County Road 322 (Bull Mountain Road), between Sand and Spring Creeks, ca 20 air mi SW of Laramie and 3 mi S of Lone Tree Reservoirs.
-105.7473
41.0579
2267
Plains. Phenology: fruiting.
RM
RM
928451
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
9419
Laura E. Lukas
2009
6
29
180
U.S.A.
Wyoming
Carbon
Saratoga Valley: Rattlesnake Creek area, N of County Road 400 (Rattlesnake Road), ca 3 air mi SE of I-80 exit 238 (Peterson Ranch) and ca 18 air mi NNE of Saratoga.
-106.6781
41.6877
2103
Sagebrush hills with several gullies, sandy, abundant bare ground. Phenology: fruiting.
RM
RM
928450
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
9780
Laura E. Lukas
2009
7
5
186
U.S.A.
Wyoming
Albany
Medicine Bow Mountains: Ring Mountain, ca 9 air mi SSE of Woods Landing and ca 28 air mi SW of Laramie.
-105.9814
41.0628
2437
2602
Gully in sagebrush hills. Phenology: flowering & fruiting.
RM
USFS
865707
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
612a
Emily Elliott
2007
5
31
151
U.S.A.
Montana
Stillwater
Beartooth Mountains: Custer National Forest: along West Rosebud Creek, ca 6 air mi SW of forest boundary, ca 24 air mi WNW of Red Lodge.
-109.7301
45.2481
1975
2000
Open slopes with scattered mixed conifer forests. Phenology: flowering.
RM
RM
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
473
Rick McNeill
2008
6
22
174
U.S.A.
Montana
Wheatland
Lewis and Clark National Forest: Little Belt Mountains: above creek from Muir Spring, Forest Road 382, ca 14.5 air mi W of Judith Gap.
-110.14655
46.6701
1768
Open meadow on sandstone with occasional limestone outcrops; southeast aspect, 10-20% slope. Phenology: flowering.
RM
RM
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
512
Rick McNeill
2008
6
24
176
U.S.A.
Montana
Wheatland
Lewis and Clark National Forest: Little Belt Mountains: Forest Road 8804, near Haymaker Campground, ca 20 air mi W of Judith Gap.
-110.13092
46.6285
1680
Open meadow; west aspect, 35% slope; sandstone bedrock. Phenology: flowering.
RM
RM
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
567
Rick McNeill
2008
6
24
176
U.S.A.
Montana
Meagher
Lewis and Clark National Forest: Little Belt Mountains: Forest Road 6519, Clark's Desert Spring, ca 24 air mi W of Judith Gap.
-110.1911
46.6288
1863
Open meadow in Pseudotsuga forest; west aspect; mixed sandstone/limestone bedrock. Phenology: flowering.
RM
RM
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
627
Rick McNeill
2008
6
24
176
U.S.A.
Montana
Meagher
Lewis and Clark National Forest: Little Belt Mountains: Forest Road 6520, Daisy Dean Campground, ca 12 air mi N of Martins Dale.
-110.3595
46.6226
1853
Open meadow on the edge of Pseudotsuga forest; south aspect, 10-20% slope; mixed sandstone and limestone bedrock. Phenology: flowering.
RM
RM
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
638
Rick McNeill
2008
6
24
176
U.S.A.
Montana
Meagher
Lewis and Clark National Forest: Little Belt Mountains: Forest Road 6393, along Spring Creek, ca 5.3 air mi NE of Checkerboard.
-110.4445
46.6923
1713
Ponderosa woodland; southeast aspect, 20-40% slope; igneous bedrock. Phenology: flowering.
RM
RM
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
697
Rick McNeill
2008
6
24
176
U.S.A.
Montana
Meagher
Lewis and Clark National Forest: Little Belt Mountains: Pasture Gulch, Forest Road 8905, ca 5 air mi SE of Checkerboard, along Cooper Creek.
-110.4507
46.5189
1619
Open meadow; northwest aspect; limestone bedrock. Phenology: flowering.
RM
RM
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
776
Rick McNeill
2008
6
24
176
U.S.A.
Montana
Meagher
Lewis and Clark National Forest: Castle Mountains: Forest Road 585, north side of Bonanza Creek, ca 5.5 air mi NW of Lennep.
-110.6044
46.4873
1901
Bench above creek; open shrub land; southwest aspect, 5% slope; shale bedrock. Phenology: flowering.
RM
RM
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
976
Rick McNeill
2008
6
28
180
U.S.A.
Montana
Judith Basin
Lewis and Clark National Forest: Little Belt Mountains: Forest Road 120, Spring Coulée
-110.5208
47.0534
1829
Pseudotsuga forest; narrow limestone canyon; east aspect, 10-15% slope. Phenology: flowering.
RM
RM
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
1103
Rick McNeill
2008
6
30
182
U.S.A.
Montana
Judith Basin
Lewis and Clark National Forest: Little Belt Mountains: junction of Forest roads 6531 and 825.
-110.2822
46.8506
1552
Dry open meadow; grazed, west aspect, 10-20% slope, limestone bedrock. Phenology: flowering.
RM
RM
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
1169
Rick McNeill
2008
6
30
182
U.S.A.
Montana
Judith Basin
Lewis and Clark National Forest: Little Belt Mountains: Forest Road 6548, N of Dry Pole Campground, from table lands down Limestone Canyon to South Fork Judith River.
-110.2993
46.7828
1613
Mixed Pinus ponderosa/Pseudotsuga forest; limestone canyon, southwest aspect, 5-40% slope. Phenology: flowering.
RM
RM
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
1503
Rick McNeill
2008
7
3
185
U.S.A.
Montana
Meagher
Lewis and Clark National Forest: Little Belt Mountains: South Fork Tenderfoot Road, ca 2 air mi from junction with Forest Road 589.
-111.0955
46.9204
1725
Riparian zone and meadow NW of road; southwest aspect, 5-30% slope, limestone bedrock. Phenology: flowering.
RM
RM
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
1573
Rick McNeill
2008
7
3
185
U.S.A.
Montana
Meagher
Lewis and Clark National Forest: Little Belt Mountains: junction of Forest roads 6503 and 831, ca 7 air mi N of Newland Creek Reservoir.
-110.9605
46.737
1952
Open ridge leading to forested peak; Pinus contorta and Pseudotsuga menziesii, limestone outcrops. Phenology: flowering & fruiting.
RM
RM
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
1647
Rick McNeill
2008
7
6
188
U.S.A.
Montana
Fergus
Lewis and Clark National Forest: Big Snowy Mountains: Forest Trail 493, ca 1 trail mi from trail head at Crystal Lake.
-109.4963
46.7897
2089
Scattered trees Pinus flexilis/Pseudotsuga menziesii/Picea glauca; sharp lime stone ridge running N and S. Phenology: flowering.
RM
RM
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
1718
Rick McNeill
2008
7
6
188
U.S.A.
Montana
Fergus
Lewis and Clark National Forest: Big Snowy Mountains: Neil Creek Trail head, ca 8 air mi NE of Judith Gap.
-109.5586
46.7537
1802
Scattered meadows in Pseudotsuga menziesii forest; south aspect, 5-20% slope. Phenology: flowering.
RM
RM
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
1873
Rick McNeill
2008
7
7
189
U.S.A.
Montana
Fergus
Lewis and Clark National Forest: Little Snowy Mountains: junction of Forest roads 272 and 271.
-109.0844
46.7777
1635
Open ridge line; north and south aspect, 0-20% slope; limestone bedrock. Phenology: fruiting.
RM
RM
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
1905
Rick McNeill
2008
7
7
189
U.S.A.
Montana
Fergus
Lewis and Clark National Forest: Little Snowy Mountains: at the end of Forest Road 271.
-109.0102
46.7964
1592
Open meadow and forest of Pseudotsuga menziesii; west aspect, 1-5% slope; limestone bedrock. Phenology: flowering.
RM
RM
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
2001
Rick McNeill Cortnee Arrington-Dwyer and Sandy Mathus
2008
7
9
191
U.S.A.
Montana
Chouteau
Lewis and Clark National Forest: Highwood Mountains: on Highwood Baldy from peak down access road to second gate on Forest Road 8830.
-110.6308
47.4417
2344
Scattered patches of trees on a shonkinite peak and ridge running W to E; 0-35% slope; occasional outcrops of synenite. Phenology: flowering.
RM
RM
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
2028
Rick McNeill Cortnee Arrington-Dwyer and Sandy Mathus
2008
7
9
191
U.S.A.
Montana
Chouteau
Lewis and Clark National Forest: Highwood Mountains: on southeast shoulder of Highwood Baldy, on Forest Road 8830, at first locked gate.
-110.6316
47.41353
1773
Open meadow along shonkinite ridge; Pseudotsuga menziesii forest; running southwest and northwest aspect, 0-35% slope. Phenology: fruiting.
RM
RM
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
2067
Rick McNeill Cortnee Arrington-Dwyer and Sandy Mathus
2008
7
9
191
U.S.A.
Montana
Chouteau
Lewis and Clark National Forest: Highwood Mountains: on southeast shoulder of Highwood Baldy, on Forest Road 8830, at first locked gate.
-110.6316
47.41353
1773
Open meadow along shonkinite ridge; Pseudotsuga menziesii forest; running southwest and northwest aspect, 0-35% slope. Phenology: fruiting.
RM
RM
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
60234
Ronald L. Hartman Brian Elliott
1998
5
20
140
U.S.A.
Colorado
Las Animas
Wet Mountains, Wet Mountain Valley, Sangre de Cristo Range, and Vicinity: County Road 105.5 at Sauce Arroyo.
-104.2397
37.0981
1740
1762
Grasslands. Phenology: flowering.
RM
RM
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
86858
Ronald L. Hartman Rick McNeill
2008
6
9
161
U.S.A.
Montana
Judith Basin
Lewis and Clark National Forest: Blacktail Hills: Dry Wolf Creek, Forest Road 251, ca 8 air mi SW of Stanford.
-109.7755
46.6285
1527
Limestone ridge with ponderosa pine, limber pine, and Douglas fir.
RM
RM
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
86970
Ronald L. Hartman Rick McNeill
2008
6
11
163
U.S.A.
Montana
Golden Valley
East end and S of Big Snowy Mountains, on county road, ca 26 air mi E of Judith Gap.
-109.2317
46.6067
1439
Road cut. Phenology: flowering.
RM
RM
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
87145
Ronald L. Hartman Rick McNeill
2008
6
13
165
U.S.A.
Montana
Chouteau
Lewis and Clark National Forest: Highwood Mountains: Highwood Creek at north edge of Highwood Mountains, ca 12 air mi SE of Highwood.
-110.5848
47.4701
1384
1695
South exposed slope, rocky ridge with rock outcrops. Phenology: flowering.
RM
RM
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
87379
Ronald L. Hartman Rick McNeill
2008
6
16
168
U.S.A.
Montana
Cascade
Lewis and Clark National Forest: Little Belt Mountains: Logging Creek, on hair pin curve on Forest Road 49, trail upstream.
-110.9315
47.1254
1451
South exposure with limestone outcrops. Phenology: fruiting.
RM
RM
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
87477
Ronald L. Hartman Rick McNeill
2008
6
16
168
U.S.A.
Montana
Judith Basin
Lewis and Clark National Forest: Little Belt Mountains: Forest Road 262, ca 9 air mi S of Geyser.
-110.5261
47.1209
1553
Grassy valley with gravelly creek bottoms. Phenology: flowering.
RM
RM
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
87562
Ronald L. Hartman Rick McNeill
2008
6
18
170
U.S.A.
Montana
Lewis and Clark
Lewis and Clark National Forest: Front Range: Forest Road 233, ca 14 air mi WSW of Augusta.
-112.708
47.4703
1703
Grassy slope and pond margin. Phenology: flowering.
RM
RM
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
60309
Ronald L. Hartman Brian Elliott
1998
5
20
140
U.S.A.
Colorado
Huerfano
Wet Mountains, Wet Mountain Valley, Sangre de Cristo Range, and Vicinity: Rouse Road (County Road 312) at railroad crossing.
-104.7106
37.5219
1951
Grasslands and ridges with pinyon pine and juniper. Phenology: flowering & fruiting.
RM
RM
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
87677
Ronald L. Hartman Rick McNeill
2008
6
18
170
U.S.A.
Montana
Judith Basin
Lewis and Clark National Forest: Highwood Mountains: North Fork Little Belt Creek, en route to Highwood Baldy, ca 12 air mi E of Belt.
-110.6545
47.4101
1448
1650
Coniferous forests and grassy slopes. Phenology: flowering.
RM
RM
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
60403
Ronald L. Hartman Brian Elliott
1998
5
22
142
U.S.A.
Colorado
Huerfano
Wet Mountains, Wet Mountain Valley, Sangre de Cristo Range, and Vicinity: County Road 340, ca 1 air mi S of Walsenburg (city center).
-104.7835
37.6093
1905
1920
Grassland and pinyon-juniper woodlands. Phenology: flowering.
RM
RM
869887
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
4319
Emily Elliott Brian Elliott
2008
6
7
159
U.S.A.
Montana
Park
Abaroka Range: Gallatin National Forest: at the beginning of forest along Forest Road 348, ca 16 air mi N of Gardiner.
-110.7699
45.261
1762
Ecotone between sagebrush/Festuca grassland and mixed conifer forest, dominated by Douglas fir, southwest-facing slope. Phenology: flowering.
RM
RM
869888
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
4558
Emily Elliott Brian Elliott
2008
6
9
161
U.S.A.
Montana
Park
Absaroka Range: Gallatin National Forest: along Forest Road 3245 between switchbacks, ca 2 mi NE of Gardiner .
-110.6784
45.0512
1935
Dry site in disturbed campground and around horse corral. Phenology: flowering.
RM
RM
939826
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
4585
Emily Elliott
2008
6
13
165
U.S.A.
Montana
Carbon
[location and coordinates withheld]
1676
Area beside road disturbed frequently with weedy forbs and area along native forb meadow with little disturbance. Phenology: flowering.
RM
RM
939827
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
4801
Emily Elliott Brian Elliott
2008
6
19
171
U.S.A.
Montana
Park
Paradise Valley: in the Carbella Recreation Site on the Yellowstone River, ca 15 air mi NW of Gardiner.
-110.9013
45.2111
1524
In disturbed area around road and campground and undisturbed slope dominated by introduced grasses and native forbs. Phenology: flowering & fruiting.
RM
RM
869889
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
4987
Emily Elliott Brian Elliott
2008
6
24
176
U.S.A.
Montana
Sweet Grass
Beartooth Mountains: Gallatin National Forest: Derby Mountain along Forest Road 6676, ca 17.5 air mi SSE of Big Timber.
-109.8758
45.5832
2134
In burned area dominated by forbs and rocky ridgetop. Phenology: flowering & fruiting.
RM
USFS
443099
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
GAH-5
G. A. Harris Wilbur A. Leonard.
1943
6
18
169
U.S.A.
Montana
Madison
Beaverhead National Forest: near Station III enclosure.
1905
Slope 10% west; shallow rocky soil; with Festuca idahoensis, Agropyron spicatum. Scattered distribution. Phenology: flowering.
RM
USFS
443100
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
D1-1
John W. Long
1921
6
15
166
U.S.A.
Montana
Beaverhead National Forest.
2286
Black loam soil. Phenology: buds.
RM
USFS
443085
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
3
Glen A. Smith
1915
U.S.A.
Montana
Kootenai National Forest: Cripple Horse Creek.
655
Slope southwest; clay loam soil. Phenology: flowering.
RM
USFS
443083
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
D3-15
C. A. Butler
1921
7
1
182
U.S.A.
Montana
Lewis and Clark National Forest: Middle Fork Teton.
1585
south slope. Phenology: flowering.
RM
USFS
443084
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
D4-62
A. F. Bateman
1921
U.S.A.
Montana
Lewis and Clark National Forest: Lower Blacktail Gulch.
1676
South slope; loam soil. Phenology: buds.
RM
USFS
443082
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
32
Harvey B. Rust
1922
7
7
188
U.S.A.
Montana
Madison National Forest: Sheep pasture.
1981
Slope rolling to the west; sandy soil; with Festuca 15%, Koeleria 10%, bluegrass 10%, Geranium 10%, Sieversia 10%. Restricted distribution. Phenology: flowering.
RM
USFS
443081
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
24
W. E. Fry
1926
6
23
174
U.S.A.
Montana
Madison National Forest: West Fork Bench.
2225
Slope 10% east; gravelly loam soil. Fairly abundant and distributed in open types. Phenology: flowering.
RM
USFS
443086
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
4
Glen A. Smith
1915
U.S.A.
Montana
Kootenai National Forest: Cripple Horse Creek.
2150
Slope southwest; clay loam soil. Phenology: fruiting.
RM
USFS
443087
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
s.n.
G. A. Smith
U.S.A.
Montana
no county
Kootenai National Forest.
Phenology: flowering.
RM
USFS
443096
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
47
Glenn Flathers
1924
6
10
162
U.S.A.
Montana
Custer National Forest: East Fork Hanging Woman Creek.
1067
Open grassland with Agropyron smithii, Agropyron spicatum, blue grama, Festuca idahoensis. Phenology: buds.
RM
USFS
443094
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
15
Charles Fleming
1911
6
15
166
U.S.A.
Montana
Deerlodge National Forest.
1981
Sandy to black loam soil; well drained area in parkland and semi-timbered range. Phenology: flowering & fruiting.
RM
USFS
443095
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
40.5
Charles Fleming
1911
7
16
197
U.S.A.
Montana
Deerlodge National Forest: Boulder Creek District.
1920
Moist soil in full sunlight. Growing with Z. elegens. Phenology: fruiting.
RM
USFS
443092
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
48
Ray M. Kingsley
1921
6
28
179
U.S.A.
Montana
Helena National Forest: Keating Gulch.
1829
East slope; moist loam lime soil; with Festuca, Poa and wheatgrasses. Phenology: flowering.
RM
USFS
443090
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
C-27
Frank A. Clark
1914
7
11
192
U.S.A.
Montana
Jefferson National Forest: Kings Hill.
2439
Southeast slope; dry rocky soil; with alumroot and sheep fescue. Phenology: flowering.
RM
USFS
443091
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
L-4
S. Leavitt
1914
7
10
191
U.S.A.
Montana
Cascade
Jefferson National Forest: Little Belt Mountains: Kings Hill; also Meagher County.
2286
Sandy loam; open park. Phenology: flowering.
RM
USFS
443089
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
23
Stacey Eckert
1922
6
6
157
U.S.A.
Montana
Jefferson National Forest.
1707
Dry shallow soil with 2 in. of humus; with sheep sedge, alpine redtop, june-grass and Festuca. Phenology: flowering.
RM
RM
196281
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
17042
Milton Lamm
1844
5
21
142
U.S.A.
Montana
Mineral
Fish Creek, Superior.
1829
Among grasses and small brush on open steep hillside. Flowers white; perianth creamy at base. Phenology: flowering.
RM
RM
117376
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
25
Esther L. Larsen
1927
6
17
168
U.S.A.
Montana
Sheridan
Westby.
Phenology: flowering.
RM
RM
130328
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
1748
J. E. Kirkwood
1924
6
18
170
U.S.A.
Montana
Missoula
Missoula: George F. Fox Ranch: Hay Spur.
975
Phenology: flowering.
RM
RM
112442
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
1748
J. E. Kirkwood
1924
6
18
170
U.S.A.
Montana
Missoula
Missoula.
Bottom. Phenology: flowering.
RM
RM
121699
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
323
Frank A. Spragg
1901
7
12
193
U.S.A.
Montana
Leal Lake.
Phenology: fruiting.
RM
RM
120215
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
s.n.
D. B. Swingle
1928
7
4
186
U.S.A.
Montana
Gallatin
Foothills of Bridger Range.
-110.9583
45.8885
Open field. Phenology: flowering.
RM
RM
89312
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
484
J. W. Blankinship
1905
6
152
U.S.A.
Montana
Gallatin
Bozeman.
1371
Plains, swales. Phenology: flowering.
RM
RM
205974
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
14493
C. Leo Hitchcock C. V. Muhlick
1946
7
7
188
U.S.A.
Montana
Granite
Junction Burnt Fork Trail and Skalkaho Road.
Phenology: flowering.
RM
RM
89317
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
s.n.
J. W. Blankinship
1906
8
30
242
U.S.A.
Montana
Warm Springs.
Alkali meadows. Phenology: vegetative only.
RM
RM
137318
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
1620
C. Leo Hitchcock
1933
5
31
151
U.S.A.
Montana
Missoula
West side Mount Sentinal, southeastern Missoula.
1097
Grassy slope. Petals long-acuminate. Phenology: flowering.
RM
RM
218964
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
18261
C. Leo Hitchcock
1948
7
12
194
U.S.A.
Montana
Lake
Mission Range: S and E of McDonald Lake.
High on canyon wall. Phenology: flowering.
RM
USFS
443254
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
SR-40
D. Nelson
1959
7
15
196
U.S.A.
Montana
Beaverhead
U.S. Sheep Experiment Station: Odell Creek
2286
10% east slope; with Geranium, Melica, Poa. Phenology: flowering.
RM
USFS
443256
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
31
Louis J. Kuennen
1968
5
21
142
U.S.A.
Montana
Missoula
Lolo National Forest: Ninemile Ranger District: Sixmile Creek, Sixmile Creek Road.
1067
55% southwest slope; with Pipo, AME, Liru, Frvi, Brte, Agsp, Brdo. Phenology: flowering.
RM
USFS
443140
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
H104
Leon C. Hurtt
1932
5
28
149
U.S.A.
Montana
Custer
U.S. Range Livestock Experiment Station.
929
North slope; sandy, shallow, dry soil; grassland. Present in spots. Phenology: flowering.
RM
USFS
443139
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
W37
E. J. Woolfolk
1933
5
11
131
U.S.A.
Montana
Custer
U.S. Range Livestock Experiment Station: Pasture R.
762
6 degree southwest slope; shallow gravelly loam soil; with Carex filifolia, grama grass, Stipa; ridge tops. Scarce. Phenology: flowering.
RM
USFS
443137
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
16
H. M. Crane
1914
7
8
189
U.S.A.
Montana
Meagher
Absaroka Forest.
-110.4405
46.2503
1890
Abundant. Phenology: flowering.
RM
RM
355366
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
562
Ellen Collins
1983
5
14
134
U.S.A.
Montana
Carbon
Yellow Hill.
1402
Calcareous ridge in Juniperus / Cercocarpus vegetation type. Phenology: flowering.
RM
RM
355486
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
5902
Robert W. Lichvar
1983
6
9
160
U.S.A.
Montana
Carbon
Lockheart Ranch.
-108.241
45.1386
1280
Riparian bottom in Populus/Acer cover class. Phenology: flowering.
RM
RM
120072
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
s.n.
D. B. Swingle
1929
7
5
186
U.S.A.
Montana
Park
Near Sedan.
Moist Meadow. Phenology: flowering.
RM
USFS
443093
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
62
no collector
U.S.A.
Montana
Gallatin National Forest.
Phenology: flowering.
RM
USFS
143101
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
16
Raymond A. Coster
1925
6
12
163
U.S.A.
Montana
Carbon
Beartooth National Forest: Beartooth Mountains: vicinity of Red Lodge Creek.
1676
Pasture; 50 degree west slope; deep, clay loam soil. Quite abundant. Phenology: flowering.
RM
USFS
443102
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
369
A. M. Baum
1914
7
182
U.S.A.
Montana
Beartooth National Forest.
Phenology: flowering.
RM
USFS
443103
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
653
William E. Lockhart
1916
6
29
181
U.S.A.
Montana
Carbon
Beartooth National Forest: Red Lodge Creek Station.
1676
Rare. Phenology: flowering.
RM
USFS
443104
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
N1
J. Nawrocki
1941
6
11
162
U.S.A.
Montana
Park
Absaroka National Forest.
1676
15% west slope; dry loam soil; grassland. Widespread. Phenology: flowering.
RM
USFS
443105
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
11
Charles Fleming Hurst
1913
6
18
169
U.S.A.
Montana
Absaroka National Forest.
1859
Gravelly soil; open grassy area. Phenology: flowering.
RM
USFS
443106
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
22
H. S. Kaufman
1922
6
152
U.S.A.
Montana
Absaroka National Forest: Contact Division.
1829
Southeast slope; rocky limestone loam. Evenly distributed across landscape; very abundant. Phenology: flowering.
RM
RM
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
3986
Rick McNeill
2009
6
3
154
U.S.A.
Montana
Meagher
Smith River Wildlife Management Area: ca 3 air mi NNE of Fort Logan.
-111.1596
46.7188
1484
Northeast aspect; 5-15% slope; sagebrush and Pinus ponderosa woodland; quartzite outcrops. Phenology: flowering.
RM
RM
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
4154
Rick McNeill Matt Voigt
2009
6
7
158
U.S.A.
Montana
Fergus
[location and coordinates withheld]
1016
Meadow and hill slope in Pinus ponderosa; high dry soils; southeast aspect; 0-25% slope. Phenology: flowering.
RM
RM
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
4408
Rick McNeill
2009
6
8
159
U.S.A.
Montana
Chouteau
Lewis and Clark National Forest: Highwood Mountains: Forest Road 121, Highwood Creek at Shoulder Creek.
-110.5942
47.4662
1374
Exposed hill slope/meadow; southeast aspect; 10-30% slope; shonkinite rock. Phenology: flowering.
RM
RM
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
4538
Rick McNeill
2009
6
17
168
U.S.A.
Montana
Teton
Front Range: south bank of Pishkun Canal at first bridge, ca 3 air mi NE of diversion from the Sun River.
-112.6484
47.6358
1359
Open rock meadow, scattered Pinus flexilis; southwest aspect; 0-5% slope. Phenology: flowering.
RM
RM
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
4564
Rick McNeill Addy Wycgans
2009
6
18
169
U.S.A.
Montana
Teton
Lewis and Clark National Forest: Front Range: Ear Mountain Trail, ca 0.5 air mi SSW of trailhead.
-112.6485
47.8647
1602
Scattered Pinus flexilis; northeast aspect; 10-25% slope; sandstone. Phenology: flowering.
RM
RM
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
4612
Rick McNeill Addy Wycgans
2009
6
18
169
U.S.A.
Montana
Teton
Front Range: Ear Mountain Trail, ca 0.7 air mi WSW of trailhead.
-112.6564
47.866
1698
Exposed limestone ridge; northeast aspect; 5-15% slope; ridge running northwest to southeast; shallow soils. Phenology: flowering.
RM
RM
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
4715
Rick McNeill Addy Wycgans
2009
6
18
169
U.S.A.
Montana
Teton
Lewis and Clark National Forest: Front Range: saddle between low ridges, ca 0.5 mi S of Ear Mountain Trailhead.
-112.6419
47.8641
1549
Ephemeral pond between ridges; 0-5% slope; all aspects. Phenology: flowering.
RM
RM
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
4749
Rick McNeill Addy Wycgans
2009
6
18
169
U.S.A.
Montana
Teton
Lewis and Clark National Forest: Front Range: Ear Mountain Trailhead.
-112.6434
47.8703
1524
Parking lot/picnic area, flat, scattered Populus tremuloides, gravel, open meadow. Phenology: flowering.
RM
RM
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
4856
Rick McNeill Addy Wycgans
2009
6
19
170
U.S.A.
Montana
Teton
Blackleaf Wildlife Management Area: Front Range: Blackleaf Road, ca 1.5 air mi ENE of Blackleaf Trailhead, where road fords Blackleaf Creek.
-112.6789
48.0179
1566
Creek bottom and surrounding flood plain, very rocky glacial outwash, many abandoned channels. Phenology: flowering.
RM
RM
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
5043
Rick McNeill
2009
6
23
174
U.S.A.
Montana
Meagher
Lewis and Clark National Forest: Castle Mountains: Forest Road 694, ca 1.5 air mi S of junction with U.S. Hwy 12.
-110.4484
46.52
1670
Forested slope; west aspect; 5-25% slope; Pinus ponderosa and Pseudotsuga menziesii. Phenology: flowering.
RM
RM
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
5096
Rick McNeill
2009
6
23
174
U.S.A.
Montana
Meagher
Lewis and Clark National Forest: Castle Mountains: Forest Road 8905, between Cooper and Whetstone creeks, ca 1/4 mi W of junction with Forest Road 694.
-110.4621
46.5278
1602
Open meadow/ Pinus ponderosa woodland on ridgetop, running north to south; 0-15% slope; occasional wet depressions. Phenology: flowering.
RM
RM
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
5130
Rick McNeill
2009
6
26
177
U.S.A.
Montana
Meagher
Lewis and Clark National Forest: Little Belt Mountains: Forest Road 6393 along Spring Creek, ca 0.5 mi SW of Basin Creek Campground.
-110.4418
46.635
1725
Northwest side of creek; southwest aspect; 0-15% slope; Pinus ponderosa and Artemisia tridentata woodland. Phenology: flowering.
RM
RM
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
5177
Rick McNeill
2009
6
26
177
U.S.A.
Montana
Meagher
Lewis and Clark National Forest: Little Belt Mountains: Forest Road 274, ca 1/4 mi N of junction with Forest Road 2019, on shoulder of Elephant Rock.
-110.4964
46.6298
1861
Open meadow; west aspect; 0-5% slope. Phenology: flowering.
RM
RM
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
5203
Rick McNeill
2009
6
26
177
U.S.A.
Montana
Judith Basin
Little Belt Mountains: County Road 107 (Yogo Road), E of Judith River Wildlife Management Area headquarters.
-110.2834
46.8818
1531
Open meadow, dry creek bottom running east to west; 0-5% slope. Phenology: flowering.
RM
RM
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
5246
Rick McNeill
2009
6
26
177
U.S.A.
Montana
Judith Basin
Lewis and Clark National Forest: Little Belt Mountains: at mouth of Sawmill Gulch where it meets Yogo Creek Canyon.
-110.3725
46.8851
1654
Wide grazed meadow; south aspect; 0-5% slope. Phenology: flowering.
RM
RM
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
5275
Rick McNeill
2009
6
28
179
U.S.A.
Montana
Chouteau
Lewis and Clark National Forest: Highwood Mountains: Forest Trail 451, ca 0.5 mi from junction with Forest Trail 460.
-110.4783
47.4773
1704
Open meadow on rocky ridge running northeast to southwest, scattered Pinus ponderosa; 5-20% slope; shonkinite. Phenology: flowering.
RM
RM
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
5308
Rick McNeill
2009
6
28
179
U.S.A.
Montana
Chouteau
Lewis and Clark National Forest: Highwood Mountains: saddle along Forest trail, 1.5 air mi NE of Prospect Peak.
-110.4814
47.4718
1720
Open meadow in saddle, seasonally wet; northwest aspect; 15-20% slope; scattered Pinus ponderosa. Phenology: flowering.
RM
RM
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
5378
Rick McNeill
2009
6
28
179
U.S.A.
Montana
Chouteau
Lewis and Clark National Forest: Highwood Mountains: Prospect Peak and ridgetop running N to S.
-110.5049
47.4575
1983
Exposed peak and ridgetop; east and west aspects; 5-15% slope; scattered Pinus contorta. Phenology: flowering.
RM
RM
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
5409
Rick McNeill
2009
6
28
179
U.S.A.
Montana
Chouteau
Lewis and Clark National Forest: Highwood Mountains: ridge S of Shonkin Creek, 1.3 air mi N of Prospect Peak.
-110.5042
47.4765
2001
Seep on north; slope 10-30%; scattered Pinus contorta. Phenology: flowering.
RM
RM
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
5713
Rick McNeill Matt Voigt
2009
7
3
184
U.S.A.
Montana
Chouteau
Square Butte, east base, ca 32 air mi SE of Fort Benton.
-110.2194
47.4704
1342
Rocky slope 5-20%; northeast aspect; large granite outcrops; scattered Pinus flexilis and Pseudotsuga menziesii. Phenology: fruiting.
RM
RM
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
5818
Rick McNeill Matt Voigt
2009
7
3
184
U.S.A.
Montana
Chouteau
Top of Square Butte, ca 31 air mi SE of Fort Benton.
-110.239
47.4725
1733
On top of butte flat; 0-5% slope; all aspects; thickly forested Pinus contorta with occasional meadows; granite. Phenology: flowering.
RM
RM
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
6214
Rick McNeill Ben Legler
2009
7
10
191
U.S.A.
Montana
Golden Valley
Lewis and Clark National Forest: Big Snowy Mountains: last peak on ridge S of Old Baldy, ca 1.8 air mi S of Old Baldy.
-109.31944
46.7265
2407
Open limestone peak; scattered Pinus flexilis, Picea engelmannii; all aspects; 0-40% slope. Phenology: flowering.
RM
RM
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
6874
Rick McNeill
2009
7
19
200
U.S.A.
Montana
Judith Basin
Lewis and Clark National Forest: Little Belt Mountains: Forest Road 831 to Ettien Ridge, ca 0.6 air mi S of Judith Guard Station.
-110.2937
46.8402
1601
Forested ridge running southwest to northeast, Pinus ponderosa, Pseudotsuga menziesii; rocky limestone soil; 0-10% slope. Phenology: flowering.
RM
USFS
888599
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
76750
B. E. Nelson Hans Hallman
2009
6
5
156
U.S.A.
Montana
Carter
Custer National Forest: Long Pines: on Exie Road (Forest Road 3119), above and along North Tie Creek, ca 10 air mi WNW of Camp Crook, SD.
-104.1711
45.5843
1085
1140
Meadows and grassy slopes with small patches of silver sagebrush. Phenology: flowering.
RM
USFS
888598
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
76789
B. E. Nelson Hans Hallman
2009
6
8
159
U.S.A.
Montana
Carter
Custer National Forest: Ekalaka Hills: along and E of Carter Gulch, ca 2.5 air mi SE of Ekalaka.
-104.5059
45.874
1097
1170
Open slopes. Phenology: flowering.
RM
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
76878
B. E. Nelson Hans Hallman
2009
6
8
159
U.S.A.
Montana
Carter
Custer National Forest: Ekalaka Hills: on Forest Road 3102A ca 1-1.5 air mi SE of junction of Mont Hwy 323 and Prairie Dale Road, ca 8-8.5 air mi SE of Ekalaka.
-104.4159
45.8202
1030
1097
Meadow. Phenology: flowering.
RM
USFS
888596
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
76977
B. E. Nelson Hans Hallman
2009
6
9
160
U.S.A.
South Dakota
Harding
Custer National Forest: Slim Buttes: just N of SD Hwy 20, ca 0.5-1 air mi W of Reva Gap, ca 17.5 air mi E of Buffalo.
-103.1897
45.5329
969
1000
Grassy slopes. Phenology: flowering.
RM
USFS
888595
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
76989
B. E. Nelson Hans Hallman
2009
6
11
162
U.S.A.
South Dakota
Harding
Custer National Forest: Slim Buttes: just S of SD Hwy 20 at Reva Gap and in The Castles, ca 18.5 air mi E of Buffalo.
-103.1724
45.5298
990
1036
Badlands with grassy patches and strips. Phenology: flowering.
RM
USFS
888594
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
77132
B. E. Nelson Hans Hallman
2009
6
12
163
U.S.A.
Montana
Carter
Custer National Forest: Long Pines: Wickham Gulch in the vicinity of Wickham Spring No. 1, ca 5.5 air mi NW of Camp Creek, SD.
-104.0713
45.5801
1036
1097
On and at the base of sandstone cliffs. Phenology: flowering & fruiting.
RM
USFS
888593
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
77269
B. E. Nelson
2009
6
14
165
U.S.A.
Montana
Carter
Custer National Forest: Long Pines: just W of South Dakota above North Slick Creek and Mill Iron Road, ca 9 air mi NNW of Camp Crook, SD.
-104.0435
45.6733
975
1033
Sandy open slopes in ponderosa pine woods. Phenology: flowering.
RM
USFS
884672
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
21
Hans Hallman B. E. Nelson
2009
6
9
160
U.S.A.
South Dakota
Harding
Custer National Forest: Slim Buttes: from butte top down to Window Rock, ca 16-16.5 air mi E of Buffalo.
-103.2131
45.5695
969
1094
Rocky slope above hardwood draw. Phenology: flowering.
RM
USFS
888540
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
154
Hans Hallman
2009
6
11
162
U.S.A.
South Dakota
Harding
Custer National Forest: Slim Buttes: ca 1 air mi W of SD Hwy 79 on JB or Forest Road 115 at southwest end of Square Top Butte, ca 22 air mi SE of Buffalo.
-103.1795
45.4016
981
1036
Grassy flat above hardwood draw. Phenology: flowering.
RM
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
442
Hans Hallman Grace Kostel, B. E. Nelson
2009
6
14
165
U.S.A.
South Dakota
Harding
Custer National Forest: Slim Buttes: near terminus of eastern-most fork of North End or Forest Road 3124 in and around Mitchell Draw near Lena Spring Number 2, ca 3.5 air mi N of Reva Gap, ca 17.5 air mi E of Buffalo.
-103.1872
45.5894
1024
1085
Sandy, rocky slope above hardwood draw. Phenology: flowering.
RM
RM
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
557
Hans Hallman
2009
6
14
165
U.S.A.
South Dakota
Harding
East Short Pine Hills: ca 0.5 air mi N of Forest Road 3111, ca 6 air mi E of Harding.
-103.7159
45.3859
1103
1213
Grasslands interspersed with badlands. Phenology: flowering.
RM
RM
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
619
Hans Hallman
2009
6
18
169
U.S.A.
South Dakota
Harding
S of SD Hwy 20 ca 3.5 air mi ESE of Jumpoff Divide, ca 9.5 air mi W of Buffalo.
-103.7357
45.5698
878
935
Grass-dominated open, rolling grazing land. Phenology: flowering & fruiting.
RM
RM
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
689
Hans Hallman
2009
6
19
170
U.S.A.
South Dakota
Harding
Ca 2.5 air mi N of SD Hwy 20, ca 4.5 air mi NE of Camp Crook near Johnson Butte.
-103.9123
45.5943
954
981
Grass-dominated open, rolling grazing land. Phenology: flowering & fruiting.
RM
USFS
888538
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
773
Hans Hallman
2009
6
20
171
U.S.A.
Montana
Rosebud
Custer National Forest: Ashland Ranger District: in and around Sawmill Gulch near Jackson Sawmill Spring, ca 1.5 air mi of Poker Jim Butte Lookout and ca 20.5 air mi SSW of Ashland.
-106.358
45.3056
1170
1234
Partially burned upland ponderosa pine woodland. Phenology: fruiting.
RM
USFS
888537
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
897
Hans Hallman
2009
6
20
171
U.S.A.
Montana
Powder River
Custer National Forest: Ashland Ranger District: in and around Anderson Reservoir in Stafford Draw along Forest Road 47032, ca 3.5 air mi S of Home Creek School on U.S. Hwy 212, ca 16 air mi ESE of Ashland.
-106.0024
45.5138
1057
1079
Grassland with partially burned, open ponderosa pine forest. Phenology: fruiting.
RM
RM
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
983
Hans Hallman
2009
6
21
172
U.S.A.
Montana
Powder River
S of U.S. Hwy 212 and E of Titus Creek, ca 22.5 air mi ESE of Ashland.
-105.7931
45.5302
1060
1091
Grass-dominated open grazing land. Phenology: fruiting.
RM
USFS
888536
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
998
Hans Hallman
2009
6
24
175
U.S.A.
South Dakota
Harding
Custer National Forest: East Short Pine Hills: along Forest Road 3111 ca 1 air mi NE of Moreau Peak, ca 19 air mi SE of Camp Crook.
-103.7039
45.3524
1146
1164
Ponderosa pine-dominated upland. Phenology: fruiting.
RM
USFS
888535
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
1510
Hans Hallman
2009
7
4
185
U.S.A.
Montana
Powder River
Custer National Forest: Ashland Ranger District: along Beaver Creek Road or Forest Road 4133 at and around Road Creek Reservoir, ca 2 air mi NW of Holiday Campground and ca 14.5 air mi ENE of Ashland.
-105.9956
45.6523
1109
1118
Disturbed roadside dominated by ponderosa pine, sweet clover, and wild rye. Phenology: fruiting.
RM
RM
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
1912
Joshua J. Irwin
2010
7
2
183
U.S.A.
Idaho
Custer
Challis National Forest: Herd Peak Highlands: near upper Deep Creek, 19.1 air mi NNE of Sun Valley.
-114.16388
43.93818
2334
Well developed soil in mesic shrub-steppe vegetation; 7° slope, S aspect; alkaline volcanic geology. 1-25 individuals apparent. Phenology: flowering.
RM
RM
905431
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
14016
Brian Elliott
2008
7
6
188
U.S.A.
Wyoming
Park
Beartooth Mountains: Shoshone National Forest: at Clarks Fork Trailhead on Wyo Hwy 296 and NE, ca 17 air mi SE of Cooke City, Montana.
-109.6515
44.8829
2042
2317
On hills with Douglas fir and lodgepole pine forest with scattered meadows and aspen stands. Phenology: flowering & fruiting.
RM
RM
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
14857
Brian Elliott
2010
6
1
152
U.S.A.
Wyoming
Crook
Black Hills National Forest: ca 12.5 air mi W (265°) of Spearfish, SD, E of Sand Creek Road on south-facing slope N of Dugout Gulch, below cliffs.
1387
Crest of ridge with limestone cap amongst Ponderosa pine/Symphoricarpos alba forest. Survey ID: 10D001 Phenology: flowering.
RM
RM
938813
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
85603B
Ronald L. Hartman
2007
6
15
166
U.S.A.
Montana
Stillwater
Beartooth Mountains: ca 4 air mi SSW of Limestone.
-109.9342
45.4303
1875
Open grassy slopes. Phenology: flowering & fruiting.
RM
USFS
888604
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
4743
Hans Hallman
2010
6
10
161
U.S.A.
Montana
Powder River
Custer National Forest: Ashland Ranger District: ca 0.5 air mi E of Fletcher Reservoir between Forest roads 4792 and 47921, ca 27.5 air mi SSE of Ashland.
-106.1203
45.2053
1143
1164
Ponderosa pine and grass-dominated draw leading into grass-dominated meadow. Phenology: fruiting.
RM
RM
909109
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
4802
Hans Hallman
2010
6
11
162
U.S.A.
Montana
Powder River
Ca 0.5 air mi W of Otter Creek Road, ca 0.5 air mi S of Custer National Forest boundary, ca 30 air mi SSE of Ashland.
-106.1384
45.1659
1091
1115
Grass and ponderosa pine-dominated draw with juniper, Linum, Tragopogon, and Rhus. Phenology: flowering & fruiting.
RM
RM
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
5093
Hans Hallman
2010
6
19
170
U.S.A.
Montana
Powder River
To ca 1.5 air mi NW of Moorehead Road, ca 4.5 air mi WSW of Broadus.
-105.4988
45.4153
981
1042
Grass and sagebrush-dominated grazing land with scattered badlands. Phenology: fruiting.
RM
RM
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
5108
Hans Hallman
2010
6
22
173
U.S.A.
Montana
Powder River
E of Moorehead Road near the Powder River, ca 9 air mi SW of Broadus.
-105.533
45.3445
945
984
Grass and sagebrush-dominated grazing land interspersed with badlands. Phenology: fruiting.
RM
USFS
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
5231
Hans Hallman
2010
6
24
175
U.S.A.
Montana
Powder River
Custer National Forest: Ashland Ranger District: E of Forest Road 4775, ca 1.5 air mi SE of East Fork Otter Creek Road, ca 2.5 air mi SSW of Holiday Campground, ca 13.5 air mi E of Ashland.
-106.0025
45.6057
1109
1189
Ponderosa pine-dominated forest with scattered rock outcrops and grass-dominated openings. Phenology: fruiting.
RM
USFS
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
5345
Hans Hallman
2010
6
26
177
U.S.A.
Montana
Rosebud
Custer National Forest: Ashland Ranger District: W of Forest Road 4794 in the vicinity of Horse Creek Buttes, ca 6 air mi SE of Poker Jim Butte, ca 23 air mi S of Ashland.
-106.2799
45.2712
1189
1213
Draw dominated by chokecherry, boxelder, and Symphoricarpos with rock outcrops on margins. Phenology: fruiting.
RM
USFS
88603
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
5450
Hans Hallman
2010
6
28
179
U.S.A.
Montana
Powder River
Custer National Forest: Ashland Ranger District: N of Forest Road 4409, generally between Cabin Creek Spring and Deer Creek Spring, ca 11 air mi ENE of Ashland.
-106.0755
45.6569
1158
1231
Ponderosa pine forest with grass-dominated openings, with Rhus, Rosa, and Balsamorhiza patches. Phenology: fruiting.
RM
USFS
888602
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
5511
Hans Hallman
2010
6
29
180
U.S.A.
Montana
Powder River
Custer National Forest: Ashland Ranger District: along Forest Road 4409, ca 1 air mi W of its junction with East Fork Otter Creek Road, ca 14 air mi ENE of Ashland.
-106.0003
45.639
1231
1262
Upland ponderosa pine and grass-dominated woodland. Phenology: fruiting.
RM
USFS
888601
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
5591
Hans Hallman
2010
6
30
181
U.S.A.
Montana
Powder River
Ca 1 air mi N of Belle Creek Road, ca 4 air mi E of its junction with Mont Hwy 59, ca 19 air mi SSE of Broadus.
-105.2449
45.1976
1036
1091
Grass and sagebrush-dominated grazing land with some moist draws and scattered small areas of badlands. Phenology: fruiting.
RM
USFS
888600
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
5717
Hans Hallman
2010
7
4
185
U.S.A.
Montana
Powder River
Custer National Forest: Ashland Ranger District: just N of Forest Road 4410, ca 2 air mi E of Yager Butte, ca 17 air mi ESE of Ashland.
-105.9809
45.4612
1158
1182
Open ponderosa pine forest with grass and sagebrush-dominated understory and scattered rock outcrops. Phenology: fruiting.
RM
USFS
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
78935
B. E. Nelson Lori E. Brummer, Michael K. Kirkpatrick, Josh Irwin, Ronald L. Hartman
2010
5
1
121
U.S.A.
Colorado
Mesa
Colorado River Valley: just SW of Samson Mesa in Smith Gulch, ca 3.5 air mi ENE of De Beque.
-108.152
39.3517
1539
1658
Slopes of a draw, clay and sandy slope with junipers below sandstone outcrops and ridgetop. Phenology: flowering.
RM
USFS
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
79058
B. E. Nelson Lori E. Brummer
2010
5
3
123
U.S.A.
Colorado
Mesa
Battlement Mesa: west end of the mesa between Horsethief and Little Horsethief creeks on V or Sunnyside Road, ca 1.5-2air mi NW of Horsethief Mountain, ca 4 air mi SE of De Beque.
-108.1539
39.2972
1682
1774
Sandstone slopes and knolls with juniper and clay flats and dry wash with sagebrush. Phenology: flowering.
RM
USFS
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
79085
B. E. Nelson Ronald. L. Hartman, Johnny Proctor, Lori E. Brummer, Michael K. Kirkpatrick, Josh Irwin
2010
5
3
123
U.S.A.
Colorado
Mesa
Battlement Mesa: west end of the mesa along Horsethief Creek on V or Sunnyside Road, ca 2.5 air mi SE of De Beque.
-108.1732
39.3157
1554
1717
Clay and sandy clay slopes below sandstone cliffs, with juniper and sagebrush. Phenology: flowering.
RM
USFS
898165
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
44
Michael K. Kirkpatrick B. E. Nelson
2010
5
7
127
U.S.A.
Colorado
Garfield
Colorado River Valley: S of the Colorado River between Divide Creek and Garfield Creek, ca 4 air mi E of Silt.
-107.5861
39.5485
1676
1768
North- and east-facing slopes of recently burned pinyon-juniper meadow. Phenology: flowering.
RM
USFS
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
148
Michael K. Kirkpatrick
2010
5
9
129
U.S.A.
Colorado
Mesa
Colorado River Valley: between Sand Wash and Little Horsethief Creek, adjacent to County Road 45.50 (De Beque Cutoff Road), ca 3 air mi S of De Beque.
-108.2003
39.274
1536
1548
Mesa top with scattered juniper and sandy soil. Phenology: flowering.
RM
USFS
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
188
Michael K. Kirkpatrick
2010
5
13
133
U.S.A.
Colorado
Garfield
Between Spruce Creek and Porcupine Creek, between Holms Mesa and Flatiron Mesa S of County Road 320, ca 7-8 air mi SW of Rifle.
-107.892
39.46
1780
1951
North aspect of juniper woodland with sagebrush understory and scattered pinyon; oakbrush in dry drainages. Phenology: flowering.
RM
USFS
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
273
Michael K. Kirkpatrick
2010
5
15
135
U.S.A.
Colorado
Garfield
Battlement Mesa: White River National Forest: N of West Mamm Creek and S of Flatiron Mesa, ca 6.5-7 air mi S of Rifle.
-107.7722
39.43
2225
2469
Juniper woodland-mixed shrubland, south aspect. Phenology: flowering.
RM
USFS
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
421
Michael K. Kirkpatrick
2010
5
21
141
U.S.A.
Colorado
Garfield
Between Garfield Creek and Baldy Creek, S of County Road 312, ca 5 air mi S of New Castle.
-107.4924
39.4968
2027
2195
Oakbrush and mixed shrubland with dry drainage. Phenology: flowering.
RM
USFS
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
504
Michael K. Kirkpatrick
2010
5
23
143
U.S.A.
Colorado
Mesa
Between Smith Creek and Alkali Creek, S of Samson Mesa, ca 6 air mi ESE of De Beque.
-108.1232
39.32
1719
1780
Adobe hills and slopes with sagebrush, greasewood and scattered juniper. Phenology: flowering.
RM
USFS
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
588
Michael K. Kirkpatrick
2010
5
23
143
U.S.A.
Colorado
Mesa
Battlement Mesa: White River National Forest: West Branch Dry Hollow Creek at forest boundary, ca 11-12 air mi SSE of Rifle.
-107.7139
39.3654
2182
2317
Sagebrush slopes with scattered pinyon and juniper below sandstone outcrops and sandy-clay soil. Phenology: flowering.
RM
USFS
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
640
Michael K. Kirkpatrick
2010
5
27
147
U.S.A.
Colorado
Mesa
Black Mountain, W of the De Beque Cutoff Road, ca 8-9 air mi SSE of De Beque.
-108.1588
39.2257
1670
2012
Juniper woodland with scattered sagebrush on eastern flanks of mountain below sandstone and shale outcrops. Phenology: flowering.
RM
USFS
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
774
Michael K. Kirkpatrick
2010
5
29
149
U.S.A.
Colorado
Garfield
Battlement Mesa: between Cottonwood and Battlement creeks, SW of Holms Mesa, ca 11 air mi WSW of Rifle.
-107.9464
39.4538
2286
2439
Rocky north-facing slopes with sagebrush and scattered juniper. Phenology: flowering.
RM
RM
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
915
Michael K. Kirkpatrick
2010
6
2
153
U.S.A.
Colorado
Mesa
White River National Forest: Flatiron Mountain and slopes, E of West Divide Creek, ca 15-16 air mi SSE of Silt.
-107.5667
39.323
2195
2439
Sagebrush shrubland on rocky hillside with mixed shrubs. Phenology: flowering.
RM
RM
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
1101
Michael K. Kirkpatrick
2010
6
7
158
U.S.A.
Colorado
Garfield
N of Edgerton Creek and E of Freeman Creek in the Roaring Fork drainage, S of Dry Park, on the west side of County Road 125, ca 4 air mi W of Carbondale.
-107.2785
39.4032
2170
2207
Sagebrush meadow with scattered pinyon pine. Phenology: flowering.
RM
RM
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
89402
Ronald L. Hartman Michael K. Kirkpatrick, Josh Irwin, John G. Proctor
2010
5
3
123
U.S.A.
Colorado
Mesa
Battlement Mesa: White River National Forest: west end of the mesa, ca 1.5 air mi NW of Horsethief Mountain.
-108.138
39.3043
1739
1804
Pinyon woodlands. Phenology: flowering.
RM
RM
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
79685
B. E. Nelson Joseph L. M. Charboneau
2010
6
10
161
U.S.A.
Montana
Valley
N of Mont Hwy 248 ca 2.5-3 air mi S of the West Fork Poplar River, ca 11 air mi E of Opheim.
-106.1629
48.8529
881
922
Grassland with swales and slopes of small cobblestones. Phenology: flowering.
RM
RM
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
79740
B. E. Nelson Joseph L. M. Charboneau
2010
6
10
161
U.S.A.
Montana
Valley
Ridge S of Theony Road just W of Opheim Hills, ca 10 air mi W of Opheim.
-106.6263
48.8503
871
911
Swale with patches of Symphoricarpos and Ribes. Phenology: flowering.
RM
RM
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
79782
B. E. Nelson Joseph L. M. Charboneau
2010
6
10
161
U.S.A.
Montana
Valley
Off of Theony Road at Lighthouse Hill BM and vicinity above Chambers and First coulees, ca 19 air mi W of Opheim.
-106.8171
48.8816
792
839
Swale. Phenology: flowering.
RM
RM
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
79818
B. E. Nelson Joseph L. M. Charboneau
2010
6
10
161
U.S.A.
Montana
Valley
In the vicinity of Saskview Reservoir N to Saskatchewan, ca 18 air mi NW of Opheim.
-106.7656
48.9996
792
804
Grassland with scattered siver sagebrush. Phenology: flowering.
RM
RM
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
79867
B. E. Nelson Joseph L. M. Charboneau
2010
6
12
163
U.S.A.
Montana
Phillips
Little Rocky Mountains: above the old Landusky Mining Camp and just below the Zortman-Landusky Gold Mine on the south side of Gold Bug Butte, ca 47 air mi SW of Malta.
-108.6178
47.9073
1381
1440
Open slopes. Phenology: flowering.
RM
RM
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
79955
B. E. Nelson Joseph L. M. Charboneau
2010
6
12
163
U.S.A.
Montana
Phillips
Little Rocky Mountains: ca 1.5 air mi SW of the old Landusky Mining Camp, ca 50 air mi SW of Malta.
-108.6362
47.8797
1158
Silver sagebrush-grassland. Phenology: flowering.
RM
RM
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
80144
B. E. Nelson
2010
6
15
166
U.S.A.
Montana
Valley
W of Hinsdale North Road and head of Sheepherders Coulee, ca 10 air mi N of Hinsdale; ca 32 air mi NW of Glasgow.
-107.0847
48.5351
780
800
Rocky slopes and flats in grassland with high ground cover of Selaginella. Phenology: flowering.
RM
RM
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
80178
B. E. Nelson
2010
6
15
166
U.S.A.
Montana
Valley
Ridge W of Snake Creek and N of Hinsdale North Road, ca 27 air mi N of Hinsdale; ca 46.5 air mi NNW of Glasgow.
-107.1165
48.777
777
783
Swale. Phenology: flowering.
RM
RM
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
80257
B. E. Nelson
2010
6
15
166
U.S.A.
Montana
Valley
Above Hardpan Coulee on Bluff Creek Road, ca 3 air mi S of Saskatchewan, ca 40 air mi N of Hinsdale; ca 57 air mi NNW of Glasgow.
-107.061
48.9587
810
829
Swale. Phenology: flowering.
RM
RM
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
80270
B. E. Nelson
2010
6
15
166
U.S.A.
Montana
Valley
Along Bluff Creek Road between Hardpan Coulee and East Fork Crow Creek, ca 35 air mi N of Hinsdale; ca 52 air mi NNW of Glasgow.
-107.0353
48.9003
820
829
Swale. Phenology: flowering.
RM
RM
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
11271
Brian Elliott
1999
8
20
232
U.S.A.
Colorado
Costilla
[location and coordinates withheld]
3475
Picea engelmannii and Abies lasiocarpa. Phenology: flowering.
RM
RM
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
5850
Brian Elliott
1999
5
21
141
U.S.A.
Colorado
Pueblo
[location and coordinates withheld]
1615
Phenology: flowering.
RM
RM
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
290
Joseph L. M. Charboneau
2010
6
23
174
U.S.A.
Montana
Valley
On Kerr Road, ca 2 mi E of West Fork Porcupine Creek, ca 3.5 mi W of Baylor; ca 15 air mi SSW of Ophiem.
-106.5548
48.6648
911
929
Grasslands with clay soil with much organic content. Phenology: flowering & fruiting.
RM
RM
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
520
Joseph L. M. Charboneau
2010
6
26
177
U.S.A.
Montana
Phillips
Off of Sunnyslope Road, ca 2 air mi N of Woody Island Coulee, ca 13 air mi ENE of Turner; ca 40 air mi NNW of Malta.
-108.1485
48.9045
876
881
Rolling grasslands with occasional sagebrush on loamy to sandy soil. Phenology: flowering.
RM
RM
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
715
Joseph L. M. Charboneau
2010
6
30
181
U.S.A.
Montana
Phillips
On North Frenchman Road, on ridge above Steelman Coulee, ca 8.5 air mi NE of Gray Reservoir, ca 37.5 air mi N of Saco; ca 51 air mi NNE of Malta.
-107.3501
48.9904
804
865
Moist swale. Phenology: flowering & fruiting.
RM
RM
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
780
Joseph L. M. Charboneau
2010
6
30
181
U.S.A.
Montana
Phillips
On Border Road, in the vicinity of a natural gas pipeline compression station, ca 1/4 air mi W of Whitewater Reservoir, ca 6 air mi NNW of Whitewater; ca 28 air mi NNE of Malta.
-107.6491
48.8478
736
743
Low-lying intermittent pond (dry). Phenology: fruiting.
RM
RM
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
792
Joseph L. M. Charboneau
2010
6
30
181
U.S.A.
Montana
Phillips
W of U.S. Hwy 191, in the vicinity of Whitewater Creek, ca 3 air mi SSW of Morgan Port of Entry, ca 12.5 air mi N of Loring.
-107.8495
48.9559
774
792
Sandy sagebrush-grasslands and hillsides. Phenology: fruiting.
RM
RM
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
874
Joseph L. M. Charboneau
2010
6
30
181
U.S.A.
Montana
Phillips
W of U.S. Hwy 191 on Fanny Hill, ca 2 air mi NNW of the confluence of Cottonwood Creek and the Milk River, ca 16 air mi NNE of Malta.
-107.7729
48.5684
756
798
Roadside. Phenology: fruiting.
RM
RM
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
5912
Brian Elliott
1999
5
23
143
U.S.A.
Colorado
Las Animas
[location and coordinates withheld]
1920
West of interstate to the top of low ridges in pinyon-juniper woodlands. Phenology: flowering & fruiting.
RM
RM
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
983
Joseph L. M. Charboneau
2010
7
1
182
U.S.A.
Montana
Valley
W of U.S. Hwy 2 in Mooney Coulee, ca 5 air mi SSE of Cornwell Reservoir, ca 8 air mi NNW of Glasgow.
-106.6944
48.3064
682
698
Coulee bottom. Phenology: fruiting.
RM
RM
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
5928
Brian Elliott
1999
5
23
143
U.S.A.
Colorado
Las Animas
[location and coordinates withheld]
1829
Pinyon-juniper with Quercus. Phenology: fruiting.
RM
RM
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
1401
Joseph L. M. Charboneau
2010
7
10
191
U.S.A.
Montana
Phillips
W of U.S. Hwy 191 in Black Coulee, ca 1 air mi NE of West Alkali Reservoir, ca 14.5 air mi SW of Malta.
-108.0687
48.2152
756
771
Swales and coulee bottoms. Phenology: fruiting.
RM
RM
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
2167
Joseph L. M. Charboneau B. E. Nelson
2010
7
24
205
U.S.A.
Montana
Phillips
Little Rocky Mountains: above the head of Grouse Gulch ca halfway between Antoine Butte and Silver Peak, ca 2.5 air mi W of Zortman; ca 46 air mi SW of Malta.
-108.5722
47.9107
1539
1573
Hilly meadow on saddle. Phenology: fruiting.
RM
RM
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
6265
Brian Elliott Elizabeth Mark
1999
6
2
153
U.S.A.
Colorado
Las Animas
[location and coordinates withheld]
2073
Pinyon-juniper. Phenology: flowering & fruiting.
RM
RM
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
6505
Brian Elliott Elizabeth Mark
1999
6
6
157
U.S.A.
Colorado
Huerfano
[location and coordinates withheld]
1935
Pinyon-juniper/grassland transition. Phenology: fruiting.
RM
RM
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
81569
B. E. Nelson
2011
6
17
168
U.S.A.
Montana
Phillips
Along Black Coulee Road, ca 13 air mi N of Dodson; ca 23 air mi NW of Malta.
-108.2514
48.5903
871
884
Rolling grassland. Phenology: flowering.
RM
RM
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
81594
B. E. Nelson
2011
6
17
168
U.S.A.
Montana
Phillips
Along Black Coulee Road near the head of Coburg Coulee, ca 20 air mi N of Dodson; ca 29 air mi NW of Malta.
-108.2653
48.6889
878
926
Lush lee slope. Phenology: flowering.
RM
RM
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
81682
B. E. Nelson
2011
6
18
169
U.S.A.
Montana
Phillips
Along Hog Farm Road just E of Big Warm Creek, ca 1 air mi SE of Ester Lake, ca 25 air mi SW of Malta.
-108.24
48.0879
807
Plains grassland with small disturbed areas. Phenology: flowering.
RM
RM
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
81773
B. E. Nelson
2011
6
20
171
U.S.A.
Montana
Valley
Along Shipp Road above Cherry Creek (S and E), ca 2.5 air mi W of Mont Hwy 24, ca 13 air mi N of Glasgow.
-106.6215
48.3821
777
798
Rolling terrain below and slope of rim with meadows, bare areas, drainage channels, with clay soil, and cobblestone covered areas. Phenology: flowering & fruiting.
RM
RM
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
82138
B. E. Nelson
2011
6
24
175
U.S.A.
Montana
Phillips
Along Alkali Road, ca 1.5 air mi E of Stage Road (Mont Hwy 204), and 1-1.5 air mi N of North Fork Mud Creek, ca 9 air mi S of Dodson, ca 17 air mi WSW of Malta
-108.224
48.2908
786
Plains grasslands with vernal depressions. Phenology: flowering & fruiting.
RM
RM
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
82184
B. E. Nelson
2011
6
24
175
U.S.A.
Montana
Phillips
Along and above "Middle Fork" Exeter Creek, ca 9 air mi ENE of Dodson; ca 10 air mi WNW of Malta.
-108.061
48.4244
801
820
Plains grassland and slopes and swales leading to the creek. Phenology: flowering & fruiting.
RM
RM
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
82377
B. E. Nelson
2011
6
26
177
U.S.A.
Montana
Valley
Along Rock Creek Road at the south edge of Rock Creek Flats, ca 5 air mi S of Thoeny; ca 24 air mi W of Opheim.
-106.9199
48.8011
750
768
Swale and adjacent slopes. Phenology: flowering & fruiting.
RM
RM
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
82469
B. E. Nelson
2011
6
28
179
U.S.A.
Montana
Phillips
At the intersection of U.S. Hwy 191 and Sunnyslope Road, ca 2 air mi N of Loring; ca 32 air mi N of Malta.
-107.8593
48.8201
853
859
Rolling plains grassland with stony knolls and swales. Phenology: flowering & fruiting.
RM
RM
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
82514
B. E. Nelson
2011
6
28
179
U.S.A.
Montana
Phillips
At the corner of Grabofsky and North Sunnyslope roads, 1 mi S of Saskatchewan, ca 45 air mi NNW of Malta.
-108.0838
48.9838
865
871
Rolling plains grassland with swales. Phenology: flowering & fruiting.
RM
RM
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
82541
B. E. Nelson
2011
6
28
179
U.S.A.
Montana
Phillips
Hills E of Chapman above Woody Island Coulee, ca 38 air mi NNW of Malta.
-108.1123
48.872
847
868
Stony bluffs, flats above, and swales. Phenology: flowering & fruiting.
RM
RM
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
4129
Joseph L. M. Charboneau
2011
5
27
147
U.S.A.
Montana
Phillips
Matador Ranch: W of Stage Road, S of Big Warm Creek, ca 2 air mi W of Parrot Lake, ca 13 air mi ENE of Zortman; ca 31 air mi SW of Malta.
-108.2993
48.0211
859
920
Moist hillslopes. Phenology: flowering.
RM
RM
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
4283
Joseph L. M. Charboneau
2011
6
1
152
U.S.A.
Montana
Valley
Charles M. Russell National Wildlife Refuge: N of Bonetrail Boat Ramp, along Refuge Road 425, ca 1 air mi N of Fort Peck Lake, ca 44 air mi WSW of Fort Peck; ca 46 air mi SW of Glasgow.
-107.252
47.6899
823
859
Sagebrush-grasslands on sandy soil. Phenology: flowering.
RM
RM
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
4804
Joseph L. M. Charboneau
2011
6
10
161
U.S.A.
Montana
Phillips
Little Rocky Mountains: Whitcomb Butte and Alder Gulch, ca 1/4 air mi S of Zortman, ca 7.5 air mi WNW of Coburn Butte, ca 45 air mi SW of Malta.
-108.5257
47.912
1243
1371
South-facing slopes, both open and wooded with ponderosa pine. Phenology: flowering.
RM
RM
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
4871
Joseph L. M. Charboneau
2011
6
12
163
U.S.A.
Montana
Phillips
N of Mont Hwy 208, hills between Lush Coulee and Martins Coulee, ca 3 air mi SW of Austin Lake, ca 6.5 air mi SSW of Whitewater; ca 24.5 air mi NNE of Malta.
-107.706
48.6831
768
804
Hillsides with stony clay soil. Phenology: flowering.
RM
RM
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
4900
Joseph L. M. Charboneau
2011
6
12
163
U.S.A.
Montana
Phillips
W of North Forks Road, ca 6 air mi S of Saskatchewan, ca 12 air mi NNE of Whitewater; ca 43 air mi NNE of Malta.
-107.5132
48.9138
826
829
Grasslands with spikemoss, fringed sage, and scattered winterfat. Phenology: flowering.
RM
RM
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
4953
Joseph L. M. Charboneau
2011
6
12
163
U.S.A.
Montana
Phillips
Dunbar Coulee, S of North Whitewater Road, ca 5 air mi WNW of Salsbery Reservoir, ca 7.5 air mi NNE of Whitewater; ca 46 air mi NNE of Malta.
-107.5633
48.8582
786
801
Grasslands with fringed sage and spikemoss on clay soil. Phenology: flowering & fruiting.
RM
RM
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
4977
Joseph L. M. Charboneau
2011
6
12
163
U.S.A.
Montana
Phillips
E of Mont Hwy 208, ca 0.5 air mi N of Austin Lake, ca 2.5 air mi SSW of Whitewater; ca 28 air mi NNE of Malta.
-107.6525
48.7303
743
746
Grasslands with spikemoss. Phenology: flowering.
RM
RM
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
5049
Joseph L. M. Charboneau
2011
6
14
165
U.S.A.
Montana
Phillips
N of Blount Cut Across, ca 8.5 air mi W of First Creek Reservoir, ca 27 air mi ESE of Zortman; ca 42.5 air mi SSW of Malta.
-107.9612
47.873
823
826
Grasslands with fringed sage and spikemoss on clay soil. Phenology: flowering.
RM
RM
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
5116
Joseph L. M. Charboneau
2011
6
15
166
U.S.A.
Montana
Phillips
Little Rocky Mountains: Spring Park Butte, E of Buffington Picnic Grounds, ca 1.5 air mi ENE of Whitcomb Butte, ca 6 air mi ENE of Landusky; ca 43 air mi SW of Malta.
-108.4955
47.921
1195
1365
Meadows on south-facing slopes. Phenology: flowering.
RM
RM
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
5189
Joseph L. M. Charboneau
2011
6
15
166
U.S.A.
Montana
Phillips
W of Midale Road, ca 4.5 air mi NNE of Veseth Reservoir, ca 28.5 air mi ENE of Zortman; ca 28 air mi SSW of Malta.
-108.1218
47.9905
829
832
Grasslands with fringed sage, spikemoss, and scattered silver sagebrush. Phenology: flowering.
RM
RM
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
5262
Joseph L. M. Charboneau
2011
6
15
166
U.S.A.
Montana
Phillips
Davidson Coulee, S of Alkali Road, ca 6 air mi NNW of West Alkali Reservoir, ca 9.5 air mi SW of Dodson; ca 13 air mi WSW of Malta.
-108.1246
48.2897
743
746
Grasslands with scattered sagebrush on loamy soil. Phenology: flowering.
RM
RM
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
5349
Joseph L. M. Charboneau
2011
6
19
170
U.S.A.
Montana
Valley
Windy Ridge and Papoose Creek, ca 1 air mi SSW of Erie Reservoir, ca 15 air mi N of Hinsdale; ca 36 air mi NW of Glasgow.
-107.085
48.6081
780
826
Moist coulee bottoms and swales. Phenology: flowering & fruiting.
RM
RM
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
5415
Joseph L. M. Charboneau
2011
6
19
170
U.S.A.
Montana
Phillips
Ridge W of Frenchman Creek, N of Frenchman Road, ca 1/4 air mi SW of Frenchman Reservoir, ca 22.5 air mi NNW of Hinsdale; ca 45 air mi NW of Glasgow.
-107.2079
48.7035
731
762
Moist coulee bottoms with buffaloberry thickets. Phenology: flowering.
RM
RM
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
5969
Joseph L. M. Charboneau
2011
6
27
178
U.S.A.
Montana
Valley
Near origin of Spring Creek, ca 8.5 air mi E of Laundry Hill, ca 25 air mi SSW of Opheim; ca 24 air mi N of Glasgow.
-106.6463
48.5389
881
890
Porcupine grass (Hesperostipa curtiseta) grasslands on rolling hills with moist swales and slopes on loamy soil. Phenology: flowering.
RM
RM
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
6016
Joseph L. M. Charboneau
2011
6
27
178
U.S.A.
Montana
Valley
Middle Fork Porcupine Creek, S of Baylor Road, ca 2 road mi E of Baylor, ca 14 air mi S of Opheim; ca 34 air mi NNE of Glasgow.
-106.4326
48.663
862
865
Grasslands on loamy soil. Phenology: flowering & fruiting.
RM
RM
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
6369
Joseph L. M. Charboneau
2011
6
30
181
U.S.A.
Montana
Phillips
Larb Hills (North): N of Cottonwood Creek, ca 4 air mi S of Bauer Reservoir, ca 13 air mi SW of Saco; ca 17.5 air mi ESE of Malta.
-107.5084
48.3002
756
807
Silver sagebrush-grasslands on loamy soil on rolling hills with swales. Phenology: flowering & fruiting.
RM
RM
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
6510
Joseph L. M. Charboneau Josh Lamp
2011
7
2
183
U.S.A.
Montana
Valley
Kaminsky Hill and area to the N, ca 3.5 air mi N of the West Fork Poplar River, ca 12.5 air mi NE of Opheim; ca 57 air mi NNE of Glasgow.
-106.1957
48.9679
923
960
Grasslands with shrubby cinquefoil and moist depressions on loamy soil. Phenology: flowering & fruiting.
RM
RM
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
6708
Joseph L. M. Charboneau
2011
7
5
186
U.S.A.
Montana
Phillips
N of Cottonwood Creek, ca 9.5 air mi WNW of Fanny Hill, ca 27 air mi WSW of Whitewater; ca 27 air mi NNW of Malta.
-107.9658
48.6137
762
792
Coulee bottom. Phenology: flowering & fruiting.
RM
RM
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
6814
Joseph L. M. Charboneau
2011
7
5
186
U.S.A.
Montana
Phillips
SW of Martin Lake, N of Turner Cutacross Road, ca 4 air mi W of Loring; ca 15 air mi WNW of Whitewater; ca 30 air mi NNW of Malta.
-107.9482
48.7898
850
853
Grasslands with occasional silver sagebrush on loamy soil. Phenology: flowering & fruiting.
RM
RM
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
7163
Joseph L. M. Charboneau
2011
7
9
190
U.S.A.
Montana
Valley
Opheim Hills: Slaughter Coulee, ca 6.5 air mi NNE of Pikes Peak, ca 6.5 air mi WNW of Opheim; ca 48 air mi NNE of Glasgow.
-106.5374
48.8777
951
990
Swales and chokecherry-serviceberry-buffaloberry thickets. Phenology: flowering & fruiting.
RM
RM
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
7493
Joseph L. M. Charboneau
2011
7
11
192
U.S.A.
Montana
Phillips
Matador Ranch: Coburn Butte and prairie to the E, ca 8.5 air mi WSW of Veseth Reservoir, ca 8.5 air mi ESE of Zortman; ca 40 air mi SSW of Malta.
-108.3518
47.8933
954
1146
Shallow draw on butte in ponderosa pine forest. Phenology: flowering & fruiting.
RM
RM
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
4850
Michael K. Kirkpatrick
2011
5
19
139
U.S.A.
Colorado
Mesa
N of Shire Gulch between De Beque Cutoff Road and Sunnyside Road, ca 7 air mi SSE of De Beque at the intersection of I-70 and De Beque Cutoff Road.
-108.1737
39.2377
1670
1804
Sagebrush meadow with scattered juniper. Phenology: flowering.
RM
RM
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
4992
Michael K. Kirkpatrick
2011
5
22
142
U.S.A.
Colorado
Mesa
Colorado River Valley: mesas on either side of Little Horsethief Creek, S of Sunnyside Road, ca 3 air mi NW of Horsethief Mountain and ca 2 air mi SE of De Beque.
-108.1887
39.3091
1585
1768
Sandy slopes and river bench below sandstone bluffs. Phenology: flowering & fruiting.
RM
RM
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
5098
Michael K. Kirkpatrick
2011
5
24
144
U.S.A.
Colorado
Mesa
Unnamed mesa N of Plateau Creek, ca 6 air mi E of Colo Hwy -65 at I-70 and ca 5 air mi W of Molina.
-108.1656
39.1928
1631
1676
Sandy mesa with juniper, oak, and mountain shrubs. Phenology: flowering.
RM
RM
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
5152
Michael K. Kirkpatrick
2011
5
26
146
U.S.A.
Colorado
Mesa
Battlement Mesa: creek below Bull Basin from waterfall to confluence with Little Alkali Creek, ca 2 air mi NW of Housetop Mountain and ca 7 air mi SSW of Parachute.
-108.0795
39.345
1707
1890
Shale and clay slopes above riparian corridor, dominated by juniper, oak, and mountain shrubs. Phenology: flowering.
RM
RM
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
5237
Michael K. Kirkpatrick
2011
5
29
149
U.S.A.
Colorado
Mesa
Battlement Mesa: hills and slopes N of Pete and Bill Creek and S of High Mesa, ca 5 air mi N of Horse Mountain and ca 4 air mi S of Parachute.
-108.0425
39.3924
1737
1951
Juniper woodland with sagebrush in openings. Phenology: flowering & fruiting.
RM
RM
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
5402
Michael K. Kirkpatrick
2011
6
1
152
U.S.A.
Colorado
Garfield
Colorado River Valley: Anvil Points, below the Roan Cliffs, ca 7 air mi W of Rifle.
-107.928
39.5213
1768
2057
Clay-shale slopes above creek bed dominated by greasewood and shadscale. Phenology: flowering.
RM
RM
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
5613
Michael K. Kirkpatrick
2011
6
6
157
U.S.A.
Colorado
Mesa
Battlement Mesa: White River National Forest: side drainage of Alkali Creek, off of Forest Road 816 and County Road 342 (Silt-Collbran Road), ca 3 air mi N of Hightower Mountain and ca 16 air mi S of Silt.
-107.6333
39.3153
2317
2378
Sandy clay slopes with sagebrush, mountain shrubs, oak, and juniper. Phenology: flowering.
RM
RM
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
5691
Michael K. Kirkpatrick
2011
6
8
159
U.S.A.
Colorado
Eagle
South slope and ridgeline of Horse Mountain, N of County Road 54, ca 6 air mi E of Castle Peak and ca 5 air mi NW of Wolcott.
-106.7242
39.7586
2378
2408
Rocky sandy-clay slopes and seeps with sagebrush, juniper, and snowberry. Phenology: flowering.
RM
RM
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
5931
Michael K. Kirkpatrick
2011
6
13
164
U.S.A.
Colorado
Garfield
Sawatch Range: east side of County Road 120 (Hubbard Cave Road), S of Lookout Mountain and ca 1/4 air mi N of County Road 115 (Red Canyon Road), ca 3.5 air mi ESE of Glenwood Springs from the junction of Colo Hwy 82 and I-70.
-107.2641
39.5192
2164
Pinyon-juniper woodland on rolling cobbly, sandy hills with sagebrush and mountain shrubs. Phenology: flowering & fruiting.
RM
USFS
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
71400
B. E. Nelson
2007
5
29
149
U.S.A.
Montana
Carbon
Beartooth Mountains: Custer National Forest: along West Red Lodge Creek and ridge between West Red Lodge and East Fork West Red Lodge creeks, ca 3 air mi SSW of Luther; ca 11.5 air mi WNW of Red Lodge.
-109.5523
45.1681
1704
1762
Westerly-facing slope with scattered limber pine, Douglas fir, and ponderosa pine, with open gravelly patches. Phenology: flowering & fruiting.
RM
USFS
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
71787
B. E. Nelson Emily Elliott
2007
6
2
153
U.S.A.
Montana
Carbon
Beartooth Mountains: Custer National Forest: along Robertson Draw at the intersection of Forest roads 2008 and 2009 ca 1-1.5 air mi N of Wyoming, ca 11.5 air mi S of Red Lodge.
-109.2578
45.0191
1926
2012
Gravelly, stony (granitic) slope in a burn. Phenology: flowering.
RM
RM
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
64114
Ronald L. Hartman
1999
5
12
132
U.S.A.
Colorado
Las Animas
Wet Mountains, Wet Mountain Valley, Sangre de Cristo Range, and Vicinity: County Road 81.5, ca 3 air mi S of Beshoar.
-104.4029
37.1854
1829
Railroad right-of-way. Phenology: flowering.
RM
USFS
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
1821
Emily Elliott
2007
6
15
166
U.S.A.
Montana
Carbon
Beartooth Mountains: Custer National Forest: along West Red Lodge Creek, ca 11.5 air mi NW of Red Lodge.
-109.4888
45.236
1780
2176
Mixed conifer forest into open meadows, along stream. Phenology: flowering.
RM
RM
960211
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
1517
Roger L. Williams
2008
6
16
168
U.S.A.
Wyoming
Carbon
Sierra Madre: North Fork Encampment River, ca 3.5 air mi WSW of Encampment.
-106.8516
41.1894
2439
Open sagebrush meadow, with Erysimum capitatum. Very few. Phenology: flowering.
RM
RM
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
257
Emma E. Freeland
2012
6
6
158
U.S.A.
Montana
Beaverhead
Ashbough Canyon, ca 4.5 air mi E of I-15, ca 29 air mi S of Dillon; ca 25 air mi NW of Monida.
-112.6803
44.8049
1969
2094
Grassy slopes with scattered sagebrush. Phenology: flowering.
RM
RM
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
302
Emma E. Freeland
2012
6
8
160
U.S.A.
Montana
Beaverhead
Centennial Valley: ca 8.5 air mi N of Idaho, ca 50 air mi SE of Dillon.
-111.9375
44.6777
2021
2067
West-facing sagebrush grassland slopes. Phenology: flowering.
RM
USFS
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
353
Emma E. Freeland
2012
6
8
160
U.S.A.
Montana
Beaverhead
Gravelly Range: Elk Lake, ca 12 air mi ENE of Lakeview; ca 48 air mi S of Ennis.
-111.6347
44.6697
2146
Sagebrush hills. Phenology: flowering.
RM
RM
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
426
Emma E. Freeland
2012
6
11
163
U.S.A.
Montana
Madison
Madison Valley: Bear Trap Canyon, east side of the Madison River, ca 8.5-9 air mi NE of Ennis, ca 0.5 air mi NE of Ennis Lake.
-111.6495
45.4554
1475
1573
Sagebrush grassland opening in a Douglas fir and Rocky Mountain juniper forest. Phenology: flowering.
RM
RM
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
493
Emma E. Freeland
2012
6
11
163
U.S.A.
Montana
Madison
Madison Valley: Cameron Bench, ca 4 air mi E of McAtee bridge, ca 26 air mi SSE of Ennis.
-111.5946
45.0889
1792
Flat grassland on a bench at the base of steep mountains. Phenology: flowering.
RM
USFS
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
554
Emma E. Freeland
2012
6
11
163
U.S.A.
Montana
Madison
Madison Range: Lee Metcalf Wilderness, Taylor Hilgard Unit: Indian Creek, ca 6-7 air mi SW of Sphinx Mountain, ca 20 air mi SSE of Ennis.
-111.5714
45.1006
1859
1890
Sagebrush grasslands with scattered limber pine and Rocky Mountain juniper. Phenology: flowering.
RM
RM
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
603
Emma E. Freeland
2012
6
13
165
U.S.A.
Montana
Madison
Ruby Range: Cottonwood Creek, ca 4 air mi WSW of Ruby River Reservoir, ca 20 air mi S of Sheridan.
-112.2252
45.1862
2012
2024
Flat sagebrush grasslands at top of a low ridge, with scattered sagebrush and scattered limber pine. Phenology: flowering.
RM
USFS
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
745
Emma E. Freeland
2012
6
15
167
U.S.A.
Montana
Madison
Snowcrest Range: Lewis Creek and Badger Creek, ca 20 air mi S of Virginia City, ca 0.5-2.5 air mi W of Vigilante Station.
-111.9745
45.0147
1881
1960
Gently sloping sagebrush grasslands. Phenology: flowering.
RM
RM
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
823
Emma E. Freeland
2012
6
16
168
U.S.A.
Montana
Beaverhead
Blacktail Valley: Blacktail Deer Creek, ca 18 air mi N of Lima Reservoir, ca 33 air mi SE of Dillon.
-112.3527
44.9038
1957
2033
East facing slopes with Artemisia tridentata and Symphoricarpos. Phenology: flowering.
RM
USFS
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
971
Emma E. Freeland
2012
6
19
171
U.S.A.
Montana
Madison
Gravelly Range: Johnny Gulch, ca 7.5 air mi WSW of McAtee Bridge, ca 20 air mi SSW of Ennis.
-111.7782
45.0662
2129
Sagebrush grasslands on low slopes near a creek. Phenology: flowering.
RM
RM
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
1331
Emma E. Freeland Justine Modica
2012
6
23
175
U.S.A.
Montana
Madison
Tobacco Root Mountains: Mine Peak, ca 1.5-3 air mi ENE of Lonesome Peak, ca 43 air mi SE of Butte.
-111.9716
45.5602
2073
2469
Sagebrush grasslands with occasional Douglas fir. Phenology: flowering.
RM
RM
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
1525
Emma E. Freeland Nicholas P. Freeland
2012
7
1
183
U.S.A.
Montana
Beaverhead
Eastern Centennial Mountains: Centennial Mountains Wilderness Study Area: Corral Creek and tributaries of Hell Roaring Creek, ca 6-8.5 air mi ESE of Upper Red Rock Lake, ca 26 air mi WSW of West Yellowstone.
-111.5829
44.5914
2170
2231
Lower slopes in a Douglas fir forest. Phenology: flowering.
RM
RM
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
1777
Emma E. Freeland
2012
7
6
188
U.S.A.
Montana
Madison
Madison Range: Trail Creek, ca 2.5-4 air mi E of Ennis Lake, ca 10 air mi NE of Ennis.
-111.5973
45.4552
2365
Open Douglas fir woodland at a gentle ridge top. Phenology: flowering & fruiting.
RM
RM
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
1961
Emma E. Freeland
2012
7
7
189
U.S.A.
Montana
Madison
Madison Range: Papoose Creek, ca 6-7.5 air mi S of Finger Mountain, ca 33 air mi SE of Ennis.
-111.5543
44.9053
2018
2125
Gentle slopes of sagebrush steppe with occasional Douglas fir. Phenology: flowering & fruiting.
RM
RM
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
7549
Lori E. Brummer
2012
5
13
134
U.S.A.
Colorado
Montrose
Vernal Mesa: area N of Jones Draw, ca 9 air mi ENE of Montrose.
-107.7246
38.5494
2332
2390
Opening in pinyon/juniper woodland. Phenology: flowering.
RM
USFS
888539
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
442
Hans Hallman Grace Kostel, B. E. Nelson
2009
6
14
165
U.S.A.
South Dakota
Harding
Custer National Forest: Slim Buttes: near terminus of eastern-most fork of North End or Forest Road 3124 in and around Mitchell Draw near Lena Spring Number 2, ca 3.5 air mi N of Reva Gap, ca 17.5 air mi E of Buffalo.
-103.1872
45.5894
1024
1085
Sandy, rocky slope above hardwood draw. Phenology: flowering.
RM
USFS
888597
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
76878
B. E. Nelson Hans Hallman
2009
6
8
159
U.S.A.
Montana
Carter
Custer National Forest: Ekalaka Hills: on Forest Road 3102A ca 1-1.5 air mi SE of junction of Mont Hwy 323 and Prairie Dale Road, ca 8-8.5 air mi SE of Ekalaka.
-104.4159
45.8202
1030
1097
Meadow. Phenology: flowering.
RM
RM
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
84460
B. E. Nelson Emma E. Freeland
2012
6
6
158
U.S.A.
Montana
Beaverhead
Northwest end of Antelope Flat, ca 3 air mi N of the Red Rock River, ca 5 air mi NE of Lima; ca 37 air mi S of Dillon.
-112.5233
44.6935
1981
2027
Sagebrush patches on cobblestone slopes. Phenology: flowering.
RM
RM
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
1685
Joshua J. Irwin
2010
6
30
181
U.S.A.
Idaho
Custer
Challis National Forest: Pahsimeroi Mountains: slopes N of upper Elbow Creek, 13.3 air mi ESE of Challis.
-113.96724
44.46638
2236
Well developed soil in mesic shrub-steppe vegetation; 11° slope, ESE aspect; volcaniclastic geology. 1-25 individuals apparent. Phenology: flowering.
RM
RM
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
2538
Joshua J. Irwin Craig Scott
2010
7
22
203
U.S.A.
Idaho
Custer
Challis National Forest: Pahsimeroi Mountains: foothills E of Dickey Peak, 24.8 air mi NNW of Mackay.
-113.8379
44.23515
2532
Well developed soil in mesic shrub-steppe vegetation; 10° slope, ESE aspect; alluvial geology. 1-25 individuals apparent. Phenology: flowering & fruiting.
RM
RM
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
791
Joshua J. Irwin Wendy Irwin
2010
6
9
160
U.S.A.
Idaho
Lemhi
Salmon National Forest: Salmon River Mountains: large, old landslide on the north side of Williams Lake, 11.5 air mi SSW of Salmon.
-113.98515
45.02308
1710
Well developed soil in mesic mountain mahogany vegetation; 8° slope, SE aspect; alluvial geology. 26-75 individuals apparent. Phenology: flowering.
RM
RM
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
2174
Joshua J. Irwin Wendy Irwin
2010
7
14
195
U.S.A.
Idaho
Lemhi
Salmon National Forest: Beaverhead Mountains: ridgetop SW of Stein Mountain near the summit, 6.3 air mi ENE of North Fork.
-113.88581
45.45587
2439
Sandy or gravelly soil in mesic shrub-steppe vegetation; 12° slope, WSW aspect; feldspathic metasandstone geology. 1-25 individuals apparent. Phenology: flowering.
RM
RM
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
379
Joshua J. Irwin
2010
5
29
149
U.S.A.
Idaho
Lemhi
Salmon National Forest: North Fork Salmon River: foothills on the east side of the confluence of Hughes Creek and North Fork Salmon River, 5.9 air mi N of North Fork.
-113.98179
45.49077
1310
Well developed soil in mesic ponderosa vegetation; 15° slope, SE aspect; meta-feldspathic arenite geology. 26-75 individuals apparent. Phenology: flowering.
RM
RM
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
89627
Ronald L. Hartman
2010
5
20
140
U.S.A.
Idaho
Lemhi
Lemhi Range: McDevitt Creek Road, ca 1 air mi W of Ida Hwy 28, 0.1-1.2 air mi N of McDevitt Creek.
-113.6583
44.9334
1543
1600
Slopes with sagebrush, ravines, and rims of washes. Phenology: flowering.
RM
RM
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
89918
Ronald L. Hartman Joshua J. Irwin
2010
5
25
145
U.S.A.
Idaho
Lemhi
Salmon National Forest: Salmon River Mountains: Fenster Creek, 2 air mi SW of Carmen on U.S. Hwy 93 N of Salmon.
-113.9246
45.2286
1250
1417
Creek side and steep slopes. Phenology: flowering.
RM
RM
667062
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
749
Amy J. Roderick
1997
6
16
167
U.S.A.
Wyoming
Carbon
Upper North Platte and Laramie River Drainages: Dana Ridge, ca 7 road mi E on Rattlesnake Pass or County Road 400 from Wyo Hwy 130; ca 9 air mi SE of Walcott Junction.
-106.6787
41.693
2115
2286
Sandstone ridge with sagebrush draws. Phenology: fruiting.
RM
RM
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
91106
Ronald L. Hartman Emma E. Stewart
2011
6
7
158
U.S.A.
Idaho
Butte
Big Lost River Valley: ca 3 air mi ENE of Moore at the base of the Lost River Range.
-113.314117
43.753117
1768
1777
Sagebrush-grassland below limestone outcrop; northern portion disturbed and planted in crested wheatgrass with natives persisting; terrain level to undulating Phenology: flowering.
RM
RM
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
91288
Ronald L. Hartman Emma E. Stewart
2011
6
9
160
U.S.A.
Idaho
Butte
Deadman Flat, ca 9 air mi E of Arco.
-113.12555
43.646017
1615
1637
Juniperus osteosperma, Artemisia tridentata, and Cercocarpus ledifolius. Phenology: flowering.
RM
RM
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
4367
Emma E. Freeland
2013
5
23
143
U.S.A.
Montana
Beaverhead
Beaverhead Valley: low hills on east side of Beaverhead River, ca 1.5 air mi E of Clark Canyon Reservoir, ca 19 air mi SW of Dillon.
-112.8212
44.9749
1826
Dry, rocky drainage in sagebrush grasslands. Phenology: flowering.
RM
RM
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
4545
Emma E. Freeland
2013
5
29
149
U.S.A.
Montana
Madison
Madison River: West Fork Campground area, ca 33 air mi S of Ennis, ca 14 air mi E of Black Butte.
-111.5761
44.8863
1798
1804
Sagebrush grasslands with occasional Juniperus scopulorum and Pseudotsuga menziesii. Phenology: flowering.
RM
RM
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
4630
Emma E. Freeland
2013
5
29
149
U.S.A.
Montana
Madison
Cliff Lake and Wade Lake region, ca 40 air mi SSE of Ennis, ca 16 air mi SE of Black Butte.
-111.5575
44.7936
1896
1963
Rocky sagebrush grasslands at edge of a Pseudotsuga menziesii forest. Phenology: flowering.
RM
RM
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
4709
Emma E. Freeland
2013
5
30
150
U.S.A.
Montana
Madison
Madison River and foothills of Gravelly Range: ca 21 air mi S of Ennis, ca 13 air mi NE of Black Butte, ca 1 air mi SW of BLM Ruby Creek Campground.
-111.6777
45.0542
1737
Grasslands on east-facing slopes. Phenology: flowering.
RM
RM
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
4749
Emma E. Freeland
2013
5
30
150
U.S.A.
Montana
Madison
Greenhorn Range: Browns Gulch, ca 1.5 air mi W of Virginia City; ca 34 air mi ENE of Dillon.
-111.9789
45.2895
1768
1890
Sagebrush grasslands. Phenology: flowering.
RM
RM
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
4796
Emma E. Freeland
2013
6
2
153
U.S.A.
Montana
Madison
Sweetwater Creek, ca 24 air mi ESE of Dillon, ca 9 air mi S of Ruby River Reservoir.
-112.1839
45.0851
1902
1963
Steep, grassy slopes in a dry draw. Phenology: flowering.
RM
RM
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
4855
Emma E. Freeland
2013
6
2
153
U.S.A.
Montana
Madison
Southern foothills of Tobacco Root Mountains: Alder Gulch, ca 5 air mi NW of Virginia City, ca 7 air mi NNE of Ruby River Reservoir, along Mont Hwy 287.
-112.0337
45.3266
1737
Grasslands just below a ridge. Phenology: flowering.
RM
RM
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
4906
Emma E. Freeland
2013
6
3
154
U.S.A.
Montana
Madison
Gravelly Range: Wall Creek, ca 23 air mi S of Ennis, ca 11 air mi NE of Black Butte.
-111.7093
45.0233
1856
1945
Rocky knoll in a grassland with occasional Pinus flexilis and Pseudotsuga menziesii. Phenology: flowering.
RM
RM
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
5030
Emma E. Freeland
2013
6
7
158
U.S.A.
Montana
Madison
Gravelly Range: West Fork Madison River, around Landon Camp, ca 10 air mi N of Lakeview, ca 12 air mi SSE of Black Butte.
-111.7638
44.7426
2140
Rocky sagebrush grasslands. Phenology: flowering & fruiting.
RM
RM
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
5109
Emma E. Freeland
2013
6
7
158
U.S.A.
Montana
Beaverhead
Eastern Centennial Mountains: Red Rock Pass, ca 14 air mi E of Lakeview, ca 2.5 air mi NW of Mount Jefferson.
-111.5284
44.595
2170
2213
Sagebrush grasslands. Phenology: flowering.
RM
RM
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
5148
Emma E. Freeland
2013
6
8
159
U.S.A.
Montana
Madison
Madison Range: Lee Metcalf Wilderness, Taylor Hilgard Unit: Middle Fork Sun Creek, ca 3 air mi E of Hilgard Peak, ca 31 air mi SSE of Ennis.
-111.5277
44.9187
2195
2207
Sagebrush grasslands. Phenology: flowering.
RM
RM
663102
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
192
C. H. Refsdal Duane Atwood
1994
5
19
139
U.S.A.
Wyoming
Uinta
Basins and Mountains of Southwest Wyoming: ca 4 air mi N of I-80 on both sides of Wyo Hwy 412.
-110.3753
41.4122
2067
2079
Clay soils on semi-barren slopes. Phenology: flowering.
RM
RM
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
5249
Emma E. Freeland
2013
6
11
162
U.S.A.
Montana
Beaverhead
Sage Creek-White Hills: ca 26 air mi S of Dillon, ca 16 air mi ESE of Clark Canyon Reservoir.
-112.5364
44.8484
2115
2152
Sagebrush grasslands on rolling hills. Phenology: flowering.
RM
RM
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
5449
Emma E. Freeland
2013
6
13
164
U.S.A.
Montana
Beaverhead
Snowcrest Range: West Fork Blacktail Deer Creek and unnamed ridge S of Antone Peak, ca 37 air mi SE of Dillon, ca 4-6 air mi SW of Antone Peak.
-112.2665
44.751
2274
2286
Sagebrush grasslands. Phenology: flowering.
RM
RM
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
5500
Emma E. Freeland
2013
6
15
166
U.S.A.
Montana
Madison
Madison Range: Taylor Hilgard Unit of Lee Metcalf Wilderness: North Fork Bear Creek and Cameron Creek, ca 3-5 air mi NW of Sphinx Mountain, ca 14-15 air mi SE of Ennis.
-111.5453
45.1804
1981
2054
Grasslands along a trail. Phenology: flowering.
RM
RM
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
5607
Emma E. Freeland
2013
6
16
167
U.S.A.
Montana
Madison
Gravelly Range: along Gravelly Range Road (Forest Road 292), ca 18 air mi N of Black Butte, ca 14 air mi SSW of Ennis.
-111.8017
45.1559
2222
2231
Grasslands with occasional Pseudotsuga menziesii and Pinus flexilis. Phenology: flowering.
RM
RM
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
5801
Emma E. Freeland
2013
6
18
169
U.S.A.
Montana
Madison
Tobacco Root Mountains: Harris Creek, ca 14-15 air mi WNW of Ennis, ca 6 air mi SW of South Baldy Mountain.
-112.0196
45.4081
2012
Sagebrush grasslands. Phenology: flowering.
RM
RM
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
5842
Emma E. Freeland
2013
6
19
170
U.S.A.
Montana
Madison
Snowcrest Range: Ledford Creek, ca 16-18 air mi S of Ruby River Reservoir, ca 30 air mi SE of Dillon.
-112.1095
44.9396
2143
Sagebrush grasslands. Phenology: flowering.
RM
RM
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
5960
Emma E. Freeland
2013
6
23
174
U.S.A.
Montana
Madison
Snowcrest Range: Divide Creek and Pocket Creek, along Forest Road 100, ca 4.5 air mi N of Forest Boundary, ca 7-8 air mi E of Antone Peak, ca 34 air mi S of Virginia City.
-112.0265
44.8027
2219
2268
Sagebrush grasslands. Phenology: flowering.
RM
RM
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
6048a
Emma E. Freeland
2013
6
24
175
U.S.A.
Montana
Beaverhead
Centennial Valley: Sand Creek, ca 4 air mi N of Idaho, ca 12 air mi S of Antone Peak, at junction of County Road 509 and BLM Road 1805.
-112.1447
44.5971
2042
Sagebrush grasslands on flat ground. Phenology: flowering & fruiting.
RM
RM
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
6109
Emma E. Freeland
2013
6
24
175
U.S.A.
Montana
Beaverhead
Western Centennial Mountains: Bean Creek, ca 3 air mi N of Idaho, ca 10 air mi W of Lakeview.
-112.0217
44.5806
2103
2146
Sagebrush steppe. Phenology: flowering & fruiting.
RM
RM
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
6333
Emma E. Freeland
2013
6
28
179
U.S.A.
Montana
Madison
Tobacco Root Mountains: Mill Creek, ca 19 air mi W of South Baldy Mountain, ca 18 air mi NW of Ennis.
-112.0666
45.478
1990
Open mixed conifer woodland near a campground. Phenology: flowering.
RM
RM
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
6488
Emma E. Freeland
2013
6
29
180
U.S.A.
Montana
Madison
Tobacco Root Mountains: Mill Creek to Rock Creek Lake, ca 10-11 air mi S of Whitehall, ca 2-3 air mi NNE of Manhead Mountain.
-112.0881
45.7082
1789
1801
Disturbed grasslands around a trailhead parking lot. Phenology: fruiting.
RM
RM
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
6710
Emma E. Freeland
2013
7
6
187
U.S.A.
Montana
Madison
Madison Range: Lee Metcalf Wilderness, Spanish Peaks Unit: Mill Creek to headwaters of Jourdain Creek, ca 6-7 air mi N of Fan Mountain, ca 9-11 air mi ENE of Ennis.
-111.5538
45.3933
2496
2557
Grasslands on gentle slopes. Phenology: flowering.
RM
RM
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
6990
Emma E. Freeland
2013
7
17
198
U.S.A.
Montana
Beaverhead
Foothills of the Snowcrest Range: Blacktail State Wildlife Management Area: East Fork Blacktail Deer Creek, ca 10 air mi NW of Antone Peak, ca 27 air mi SE of Dillon.
-112.2757
44.9072
2176
2243
Grasslands on flats at the top of a broad ridge. Phenology: fruiting.
RM
USFS
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
79085
B. E. Nelson Ronald. L. Hartman, Johnny Proctor, Lori E. Brummer, Michael K. Kirkpatrick, Josh Irwin
2010
5
3
123
U.S.A.
Colorado
Mesa
Battlement Mesa: west end of the mesa along Horsethief Creek on V or Sunnyside Road, ca 2.5 air mi SE of De Beque.
-108.1732
39.3157
1554
1717
Clay and sandy clay slopes below sandstone cliffs, with juniper and sagebrush. Phenology: flowering.
RM
RM
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
253
Lori E. Brummer
2010
6
6
157
U.S.A.
Colorado
Montrose
Dry Creek Basin: mesatop NE of East Fork Dry Creek, 0.3 road mi NW of Colo Hwy 90 on Rim Road, then 0.2 mi SE on spur near canyon rim, ca 12 air mi SW of Montrose.
-108.058
38.3688
2439
2442
Pinyon/juniper forest on mesatop. Phenology: flowering.
RM
RM
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
3245
Lori E. Brummer
2011
5
27
147
U.S.A.
Colorado
Mesa
Plateau Valley: lower north slopes of Indian Peak, ca 25 air mi NE of Grand Junction.
-108.1284
39.2072
1597
1719
Scattered juniper and desert grassland on clay hills with sandstone outcrops. Phenology: flowering.
RM
RM
921775
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
10998
Robert D. Dorn
2014
5
28
148
U.S.A.
Wyoming
Goshen
Ca 6 mi SE of Huntley.
-104.078333
41.856667
1341
Chalky outcrop, with Eremogone hookeri and Viola. Flowers white. Phenology: flowering.
RM
RM
921446
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
11077
Robert D. Dorn
2014
6
9
160
U.S.A.
Wyoming
Goshen
Ca 13 mi W of Lingle along Deer Creek Road.
-104.606667
42.116667
1432
Sandy bank, with Ipomopsis and Artemisia. Flowers cream. Phenology: flowering.
RM
RM
921459
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
11089
Robert D. Dorn
2014
6
9
160
U.S.A.
Wyoming
Platte
Ca 6 mi NW of Wheatland.
-105.111667
42.103333
1432
Chalky outcrop, with Hymenopappus and Cryptantha. Flowers cream. Phenology: flowering.
RM
RM
663101
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
356
C. H. Refsdal
1994
5
30
150
U.S.A.
Wyoming
Uinta
[location and coordinates withheld]
2225
2256
Ridgetop and slopes; alternating sandy and clay soils. Phenology: flowering.
RM
RM
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
770
Georgia G. Thomas
2013
7
11
192
U.S.A.
Idaho
Idaho
Bitterroot National Forest: Frank Church - River of No Return Wilderness: Nez Perce Pass: ca 1 mi on Forest Trail 16, ca 26 air mi SSW of Darby, MT.
-114.4995
45.7118
1990
2112
Subalpine hillside, dry meadow. Phenology: flowering.
RM
RM
662905
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
60
C. H. Refsdal
1993
5
18
138
U.S.A.
Wyoming
Fremont
Wind River Basin: Red Rim, level ridgetop overlooking canyon near Lander.
-108.6102
42.6292
2195
Level ridgetop. Phenology: flowering.
RM
RM
663215
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
668
C. H. Refsdal R. H. Lathrop
1994
6
11
162
U.S.A.
Wyoming
Sweetwater
Basins and Mountains of Southwest Wyoming: Cedar Mountain, ca 8 air mi NW of McKinnon; on both sides of Cedar Mountain Rim Road at second switchback climbing east flank of the mountain.
-109.9581
41.1836
2408
2432
Steep sagebrush slopes; aspen grove. Phenology: flowering & fruiting.
RM
RM
663216
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
711
C. H. Refsdal R. H. Lathrop
1994
6
11
162
U.S.A.
Wyoming
Sweetwater
Basins and Mountains of Southwest Wyoming: Cedar Mountain, ca 5 air mi NW of McKinnon; ca 4.1 road mi W of the junction of Cedar Mountain Rim Road with Turtle Bluff Rim Road.
-110.0282
41.093
2597
2606
Semi-barren, windswept ridgetop. Phenology: flowering & fruiting.
RM
RM
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
2489
Georgia G. Thomas
2014
5
27
147
U.S.A.
Idaho
Idaho
Nez Perce National Forest: Middle Fork Clearwater Wild and Scenic River: Race Creek Trail Head: along Selway River, ca 3 mi upriver from Race Creek along Forest Trail 4, above Balinger Rapids, ca 23 mi NNE of Elk City.
-115.1512
46.0795
565
Rocky, open, Pinus ponderosa dominated streamside slope. Phenology: flowering & fruiting.
RM
RM
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
2667
Georgia G. Thomas
2014
6
3
154
U.S.A.
Idaho
Idaho
Bitterroot National Forest: Middle Fork Clearwater Wild and Scenic River: Paradise Guard Station: ca 2 mi on Forest Trail 4 along Selway River, ca 30 air mi WSW of Darby, MT.
-114.7761
45.8751
921
923
Open cliffsides, apprroximately 200 feet above river with Pinus ponderosa and Pseudotsuga menziesii. Phenology: flowering.
RM
RM
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
2829
Georgia G. Thomas
2014
6
3
154
U.S.A.
Idaho
Idaho
Bitterroot National Forest: Selway-Bitterroot Wilderness: Paradise Guard Station: ca 3 mi on Forest Trail 24 along White Cap Creek, ca 25 air mi WSW of Darby, MT.
-114.6557
45.8816
1075
Sunny steep hillside above river dominated by an open Pinus ponderosa forest. Phenology: flowering.
RM
RM
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
2831b
Georgia G. Thomas
2014
6
3
154
U.S.A.
Idaho
Idaho
Bitterroot National Forest: Selway-Bitterroot Wilderness: Paradise Guard Station: ca 3 mi on Forest Trail 24 along White Cap Creek, ca 25 air mi WSW of Darby, MT.
-114.6557
45.8816
1075
Sunny steep hillside above river dominated by an open Pinus ponderosa forest. Phenology: flowering.
RM
RM
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
2894
Georgia G. Thomas
2014
6
4
155
U.S.A.
Idaho
Idaho
Bitterroot National Forest: Selway-Bitterroot Wilderness: Indian Creek Campground: ca 2 mi on Forest Trail 10, Indian Creek Ridge Trail, ca 31 air mi SW of Darby, MT.
-114.7348
45.7958
1790
Mixed coniferous forest, ridgeline, Pseudotsuga menziesii and Abies grandis. Phenology: flowering.
RM
RM
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
2931
Georgia G. Thomas
2014
6
4
155
U.S.A.
Idaho
Idaho
Bitterroot National Forest: Selway-Bitterroot Wilderness: Indian Creek Campground: ca 2 mi on Forest Trail 10, Indian Creek Ridge Trail, ca 31 air mi SW of Darby, MT.
-114.7524
45.7925
1530
1273
South-facing open ponderosa pine hillside. Phenology: flowering.
RM
RM
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
3606
Georgia G. Thomas
2014
6
22
173
U.S.A.
Idaho
Idaho
Nez Perce National Forest: Selway-Bitterroot Wilderness: Moose Creek Ranger Station: ca 1 mi on Forest Trail 430 to Freeman Peak, ca 54-55 air mi ESE of Kamiah.
-114.8856
46.1287
1250
1409
Open slope. Phenology: flowering & fruiting.
RM
RM
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
3682
Georgia G. Thomas
2014
7
2
183
U.S.A.
Idaho
Idaho
Bitterroot National Forest: Frank Church - River of No Return Wilderness: Kim Creek Saddle: ca 2 air mi on Forest Trail 26, ca 36-38 air mi SW of Darby, MT.
-114.7641
45.6846
1767
1797
Mixed coniferous forest. Phenology: flowering.
RM
RM
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
3832
Georgia G. Thomas
2014
7
1
182
U.S.A.
Idaho
Idaho
Bitterroot National Forest: Selway-Bitterroot Wilderness: Paradise Guard Station to Bad Luck Mountain: ca 2 mi on Forest Trail 52, ca 28 air mi WSW of Darby, MT.
-114.7359
45.8787
1253
1542
Mixed coniferous forest including ponderosa pine. Phenology: flowering.
RM
RM
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
3862
Georgia G. Thomas
2014
7
1
182
U.S.A.
Idaho
Idaho
Bitterroot National Forest: Selway-Bitterroot Wilderness: Bad Luck Mountain: ca 4 mi on Forest Trail 52, ca 28 air mi WSW of Darby, MT.
-114.7223
45.8903
1590
Rocky hillside. Phenology: flowering & fruiting.
RM
RM
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
4308
Georgia G. Thomas
2014
7
15
196
U.S.A.
Idaho
Idaho
Nez Perce National Forest: Selway-Bitterroot Wilderness: Shearer Guard Station: Goat Ridge, ca 3 mi on Forest Trail 526, ca 28.5 air mi ENE of Elk City.
-114.879
45.9735
1284
1755
Mixed coniferous forest. Phenology: flowering & fruiting.
RM
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
45352
Ronald L. Hartman Tom Cramer and Charmaine Refsdal
1994
5
24
144
U.S.A.
Utah
Daggett
North Slope Uinta Mountains: Ashley National Forest: Dripping Spring, ca 2 air mi SE of Dutch John.
-109.3475
40.9233
1829
1890
Pinyon-juniper with some ponderosa pine and stream bottoms. Phenology: flowering.
RM
RM
637191
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
35098
B. E. Nelson C. H. Refsdal
1995
6
18
169
U.S.A.
Wyoming
Sweetwater
Basins and Mountains of Southwest Wyoming: ca 0.5 to 1 air mi N of Henrys Fork W of County Road 1 on lower southeast slopes of Cedar Mountain, ca 40 air mi SW of Green River; ca 11 air mi NW of Manila, Utah.
-109.9518
41.0642
2134
2164
Along dry wash in sandy or gravelly soils. Phenology: flowering & fruiting.
RM
RM
637190
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
35217
B. E. Nelson C. H. Refsdal
1995
6
18
169
U.S.A.
Wyoming
Uinta
Basins and Mountains of Southwest Wyoming: Wildcat Butte between Church Butte Road and I-80 at Sweetwater County, ca 14.8 air mi NE of Lyman; ca 49 air mi ENE of Evanston.
-110.0478
41.4397
2079
2128
Sandy clay areas of sagebrush on nearly flat areas. Phenology: flowering & fruiting.
RM
RM
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
1638
Crista L. O'Conner
2016
6
27
179
U.S.A.
Idaho
Latah
Palouse Range: Hog Meadow Creek, NE of Forest Road 1963, ca 5 air mi ESE of Deary.
-116.4574
46.7882
841
847
Along cobble of ephemeral stream. Phenology: fruiting.
RM
RM
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
3174
Crista L. O'Conner Catherine Curtis
2017
5
28
148
U.S.A.
Idaho
Idaho
Clearwater Mountains: Split Creek Ridge along Trail 133, ca 13 air mi NE of Lowell.
-115.3976
46.2338
695
877
Exposed southerly slope with occasional pockets of shrubs and Pseudotsuga menziesii in moisture-retaining draws/seeps. Bromus tectorum abundant; Pseudoroegneria spicata and Koeleria macrantha common. Phenology: flowering & fruiting.
RM
RM
958479
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
12025
Robert D. Dorn
2018
6
15
166
U.S.A.
South Dakota
Custer
Ca 15 mi SW of Custer.
-103.828333
43.63
1524
Grassland with Koeleria, Elymus, Artemisia frigida. Phenology: flowering & fruiting.
RM
RM
637192
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
4093
C. H. Refsdal
1995
6
16
167
U.S.A.
Wyoming
Uinta
[location and coordinates withheld]
2140
2170
Rolling semi-barren sagebrush hills and ridgetops. Phenology: flowering & fruiting.
RM
RM
981637
Zigadenus venenosus var. gramineus
physical specimen
Melanthiaceae
Zigadenus
venenosus
var. gramineus
(Rydb.) O. S. Walsh ex M. Peck
4437
Bonnie Heidel
2018
6
2
153
U.S.A.
Wyoming
Albany
West slope Laramie Range: ca 1.4 mi NE of U.S. Hwy 30, ca 3.5 air mi E of downtown Laramie.
-105.5298
41.3169
2268
Upper slope, nourtheast aspect on sandy loam; with Cercocarpus montanus, Elymus spicatus, Senecio integerrimus. Phenology: flowering.
3600
3,1,0
true