Euphorbia spathulata (1997)
EUPHORBIACEAE
Euphorbia spathulata Lam.
U.S.A., Colorado, Fremont County: East-central Colorado: Mosquito Range to Plains: Arkansas River Drainage: Twin Mountain: on south slopes and stream gulches just off U. S. Hwy 50, ca 6 air mi NW of Ca¤on City.
On rocky, open slopes in pinyon-juniper. Phenology: fruiting.
with Irene Thien
Accession: RM (unaccessioned)

Euphorbia spathulata (2003)
EUPHORBIACEAE
Euphorbia spathulata Lam.
U.S.A., Wyoming, Campbell County: 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.
Watercourses between clay hills and creek. Phenology: fruiting.
Accession: RM (unaccessioned)

Euphorbia spathulata (2003)
EUPHORBIACEAE
Euphorbia spathulata Lam.
U.S.A., Wyoming, Weston County: Thunder Basin National Grassland and Vicinity: tributary of Skull Creek, E of Sunquist Draw, on County Road 14, ca 13 air mi ESE of Upton; ca 15 air mi NE of Newcastle.
Lower part of ravine slope with Scribner's panic grass. Phenology: fruiting.
Peter J. Ebertowski, 6163. 7/7/2003.
Accession: RM (unaccessioned)

U.S.A., Arizona, Coconino County: Coconino National Forest: Casner Research Natural Area: Casner Canyon E of Oak Creek, ca 2 air mi N of Munds Mountain, ca 3 air mi NE of Sedona.
Open south-facing slope with scattered chaparral, Opuntia, and cover of Bromus rubens. Phenology: flowering & fruiting.
with James F. Fowler

U.S.A., Arizona, Gila County: San Carlos Indian Reservation.
Elev. 2500 ft.
Gila/Graham Counties. Phenology: flowering & fruiting.
with Ruth A. Nelson
Accession: RM 153533

U.S.A., Arizona, Maricopa County: Mazatzal Mountains: about Collom Camp at foot of mountains.
Elev. 4000 ft.
Oak woods. Phenology: fruiting.
with Ruth A. Nelson
Accession: RM 153534

U.S.A., New Mexico, Luna County: NM Hwy 331: SSW of Deming, leading to Hermanas: ca 9 mi from Deming.
Elev. 4300 ft.
Arroyo through desert dominated by Larrea, Prosopis, and Florensia.
Accession: (unaccessioned)

U.S.A., Colorado, Delta County: Northern Gunnison Basin: ca 3 air mi NNE of Crawford.
Juniper and aspen shrubland (Atriplex). Phenology: flowering.
Accession: RM 719369

U.S.A., Colorado, Delta County: Northern Gunnison Basin: ca 3.5 air mi NNE of Crawford.
Sagebrush and saltbush meadow; juniper. Phenology: flowering.

U.S.A., South Dakota, Pennington County: Buffalo Gap National Grassland and Vicinity: ca 4.5 air mi SSE of Scenic on Forest Road 7172, near the Cheyenne River.
On revegetated and stabilized sand dunes of the river. Phenology: flowering & fruiting.

U.S.A., South Dakota, Pennington County: 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..
On badlands in deep channel draining into creek; soils of white, heavy clays. Phenology: flowering & fruiting.

U.S.A., South Dakota, Custer County: Buffalo Gap National Grassland and Vicinity: ca 10-10.5 air mi ESE of Fairburn, S of County Road 18 in French Creek.
In clay soil along creek and creek banks. Phenology: flowering & fruiting.

U.S.A., South Dakota, Fall River County: Buffalo Gap National Grassland and Vicinity: ca 4 mi SE of Limestone Butte.
On livestock dam with alkaline soil. Phenology: fruiting.

U.S.A., South Dakota, Pennington County: 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.
In Pascopyrum smithii/Nassellus viridula plant community and grass upland on north side of creek in silty soil. Phenology: flowering & fruiting.

U.S.A., South Dakota, Custer County: Buffalo Gap National Grassland and Vicinity: ca 19-19.5 air mi SE of Hermosa and 2 air mi SW of Red Shirt and 0.5 miW of SD Hwy 40.
In prarie dog town with soils of silt and clay. Phenology: flowering & fruiting.

U.S.A., South Dakota, Fall River County: Buffalo Gap National Grassland and Vicinity: side drainage of Moss Agate Creek, ca 5 air mi NW of Edgemont.
Ungrazed drainage; soils on side slopes are gravelly, rocky, and loose; soils in bottom are deep, moist loam. Phenology: fruiting.

U.S.A., South Dakota, Pennington County: Buffalo Gap National Grassland and Vicinity: ca 11 air mi SE of Scenic.
In badlands area, revegetated and stable, soils are clay and clay loam. Phenology: flowering & fruiting.

U.S.A., South Dakota, Pennington County: Buffalo Gap National Grassland and Vicinity: ca 8.5-9 air mi SSE of Wall in Conata Basin.
Badlands floodplain of deep white clay soil. Phenology: flowering.

U.S.A., South Dakota, Pennington County: Buffalo Gap National Grassland and Vicinity: Indian Creek Wilderness Area: ca 6.5 air mi WSW of Scenic.
On slopes scattered with Juniperus scopulorum in a Nasellus viridula plant community of silty clay soils. Phenology: flowering & fruiting.

U.S.A., South Dakota, Jackson County: Buffalo Gap National Grassland and Vicinity: ca 7 air mi SW of Kadoka.
On rolling prairie near the rim of a drainage/draw, in silty loam soils. Phenology: flowering & fruiting.

U.S.A., South Dakota, Jackson County: Buffalo Gap National Grassland and Vicinity: ca 10 air mi ESE of Cottonwood.
On gently rolling prairie uplands, soils are gravel and silt loams. Phenology: flowering & fruiting.

U.S.A., South Dakota, Custer County: Buffalo Gap National Grassland and Vicinity: ca 9.5-10 air mi SE of Farmingdale and 1 air mi SE of Berner Dam.
In rock beds of rocky, heavy clay soil with iron present. Phenology: fruiting.

U.S.A., South Dakota, Pennington County: Buffalo Gap National Grassland and Vicinity: ca 6.5 air mi SSE of Wall.
On a rock covered mesa having a soil depression due to moisture at summit; soil is gravel and silt. Phenology: fruiting.

U.S.A., South Dakota, Pennington County: Buffalo Gap National Grassland and Vicinity: ca 6 air mi SSE of Wall.
In typic badlands habitat; soils are deep heavy clay. Phenology: fruiting.

U.S.A., South Dakota, Fall River County: 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.
On rolling prairie uplands dissected by deep drainages; soils are loam to loamy clay. Phenology: fruiting.

U.S.A., South Dakota, Pennington County: Buffalo Gap National Grassland and Vicinity: ca 6.5 air mi SE of Scenic in Cain Creek.
In a side drainage of and in the creek, soils are white clays. Phenology: fruiting.

U.S.A., South Dakota, Pennington County: Buffalo Gap National Grassland and Vicinity: ca 6 air mi SSE of Scenic.
On a ridge in a Yucca glauca plant community, soils are silt loam and sand. Phenology: fruiting.

U.S.A., New Mexico, Catron County: Datil National Forest: Mangas Ranger Station pasture.
On level slope; sandy clay loam soil. Phenology: fruiting.
Accession: USFS 511844

U.S.A., Colorado, Mesa County: San Miguel and Lower Dolores River Drainages: ca 5 air mi NE of Gateway.
Dry wash and adjacent hillsides: on barren, granitic gravel on east side and red, sandy soils on west side; with pinyon and juniper. Phenology: flowering & fruiting.
Accession: (unaccessioned)

U.S.A., Colorado, Montrose County: San Miguel and Lower Dolores River Drainages: San Miguel Drainage: canyon and hills S of San Miguel River, ca 8 mi NW of Naturita.
With pinyon and juniper. Phenology: flowering.
Accession: (unaccessioned)

U.S.A., Arizona, Mohave County: Arizona Strip: Cedar Ridge.
T40N R6W S12
Chinle clay soils; pinyon, juniper community. Phenology: fruiting.

U.S.A., Colorado, Larimer County: 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.
Steep sided ravine with rocky south and east facing slopes, shrub cover of Ribes and Rubus with Bromus and Thermopsis. Phenology: flowering.
with Ronald L. Hartman

U.S.A., New Mexico, Los Alamos County: [location and coordinates withheld]
Rocky slopes. Phenology: fruiting.
Accession: RM 805321, Barcode: RM0114305

U.S.A., New Mexico, Luna County: NM Hwy 331: SSW of Deming, leading to Hermanas: ca 9 mi from Deming.
Arroyo through desert dominated by Larrea, Prosopis, and Florensia. Phenology: fruiting.

U.S.A., Wyoming, Johnson County: Buffalo.
Phenology: fruiting.
Accession: RM 38285, Barcode: RM0148434

U.S.A., Wyoming, Platte County: 18 mi NW of Wheatland.
Rocky slope with Triodanis. Phenology: fruiting.
Accession: RM 601164, Barcode: RM0148421

U.S.A., Wyoming, Goshen County: 15 mi NW of Ft. Laramie.
Ponderosa pine with Juniperus and Triodanis holzingeri. Phenology: fruiting.

U.S.A., Wyoming, Sheridan County: Sheridan Road.
Dry lanes. Phenology: fruiting.

U.S.A., New Mexico, Grant County: Gila National Forest; Stevens Creek.
Phenology: flowering & fruiting.
Annotations:
1. Euphorbia spathulata Lam.
Annotated by Elinor Lehto in 1981.
Accession: RMRS (unaccessioned)

U.S.A., South Dakota, Pennington County: Black Hills: along road to Mt. Rushmore.
Along road. Phenology: flowering.

U.S.A., South Dakota, Custer County: Black Hills: Wind Cave.
T6S R5E S1
Foothills; grass association; xero-mesophytic. Phenology: flowering.

U.S.A., Colorado, Larimer County: Horsetooth Gulch.
Phenology: flowering.
Annotations:
Annotated by Aven Nelson in 1905.

U.S.A., Colorado, no county County:
Phenology: flowering.
Earl L. Johnston, 878. //1906.

U.S.A., Colorado, Montrose County: Naturita.
Dry hillside. Phenology: flowering & fruiting.

U.S.A., Colorado, Montrose County: Naturita.
Dry hillside. Phenology: fruiting.

U.S.A., Colorado, Boulder County: Eldorado Springs.
Streamside meadow. Phenology: flowering & fruiting.

U.S.A., Colorado, Boulder County: Boulder vicinity.
Elev. 1700 m.
Phenology: flowering & fruiting.

U.S.A., Colorado, Boulder County: Near Boulder.
Plains and foothills. Phenology: flowering & fruiting.

U.S.A., Colorado, Weld County: New Windsor.
River. Phenology: flowering & fruiting.

U.S.A., Colorado, Weld County: New Windsor.
River. Phenology: flowering.
George E. Osterhout, 366. 7//1894.

U.S.A., Colorado, Weld County: Windsor.

U.S.A., Colorado, Larimer County: Horsetooth.
Phenology: flowering & fruiting.
Annotations:
Annotated by Harold D. Harrington.
George E. Osterhout, 699. 7/16/1895.

U.S.A., Colorado, Las Animas County: Brantly Canyon.

U.S.A., Colorado, Mesa County: De Beque.
Annotated by B. E. Nelson in 1979.
George E. Osterhout, s.n.. 6/2/1912.

U.S.A., Colorado, Larimer County: Roosevelt National Forest: Rist Canyon.
15% east slope; deep silt clay; common in park. Phenology: flowering & fruiting.
Annotated by Louis C. Wheeler in 1942.
Accession: USFS 511710

U.S.A., Wyoming, Natrona County: Sweetwater Rocks: Savage Pocket, ca 13 air mi NE of Muddy Gap Junction.
Base of cliff at edge of creek. Phenology: flowering & fruiting.
with Georgia Haines

U.S.A., Wyoming, Campbell County: [location and coordinates withheld]
Eroded uplands, ponderosa pine ridges, ravines, sagebrush plains, open clayey slopes, loose talus; along stream in ravine, slopes. Phenology: fruiting.
with Mary Alice Sanguinetti

U.S.A., Wyoming, Campbell County: Powder River Basin: ca 12 air mi NE of Weston.
Ponderosa topped hills and flats below. Phenology: flowering.
with Keith Dueholm and Mary Alice Sanguinetti

U.S.A., Wyoming, Campbell County: Powder River Basin: ca 18 air mi WNW of Rockypoint.
Eroded hills with ponderosa pine. Phenology: flowering & fruiting.
with Keith Dueholm and Mary Alice Sanguinetti

U.S.A., Wyoming, Platte County: 19 mi NW of Wheatland.
Rocky slope with Triodanis. Phenology: fruiting.

U.S.A., Wyoming, Crook County: Black Hills: Bear Lodge Mountains: E slope of Norgrain Hill near South Dakota, ca 7.5 air mi NE of Aladdin; ca 25.5 air mi NE of Sundance.
Moist shaded bottom of a draw. Phenology: fruiting.

U.S.A., Wyoming, Crook County: Devils Tower National Monument: below south face of tower.
Common on open grassy south facing slope. Phenology: flowering.

U.S.A., Wyoming, Crook County: Devils Tower National Monument: Prairie Dog Town, east end.
Common on disturbed alluvial soil. Phenology: flowering & fruiting.

U.S.A., Wyoming, Crook County: Black Hills: Devils Tower National Monument: Prairie Dog Town SE of road near culvert.
Grassland.

U.S.A., Wyoming, Crook County: [location and coordinates withheld]
Grassland on red shale soil. Phenology: flowering.

U.S.A., Wyoming, Crook County: [location and coordinates withheld]
Grassy slopes below quarry. Phenology: flowering.

U.S.A., Wyoming, Crook County: Devils Tower National Monument: east end of Dog Town, along south side of main road.
Occasional on well-drained alluvial soil with Convolvulus arvensis and Aristida. Phenology: fruiting.
Hollis Marriott, 676. 6/2/1981.

U.S.A., Wyoming, Crook County: Black Hills: ca 2 air mi NE of Aladdin.
Prairie, sandstone outcrops, and dry drainage; prairie. Phenology: fruiting.

U.S.A., Wyoming, Crook County: Black Hills: Boundary Gulch, ca 6 air mi S of Beulah.
Moist stream bottom with Pinus ponderosa dominated sandy slopes; partly open sandy slope. Phenology: fruiting.

U.S.A., New Mexico, Eddy County: Carlsbad.
Sandy river banks. Phenology: fruiting.
3. Euphorbia spathulata Lam.
Annotated by B. E. Nelson in 2009.

U.S.A., Colorado, Otero County: Comanche National Grassland: ca 0.5 air mi E and above West Dry Creek, ca 12.5 air mi SW of Timpas; ca 29 air mi SW of La Junta.
Sandstone bluffs and limestone chip rock flats above. Phenology: flowering & fruiting.
1. Euphorbia spathulata Lam.
Annotated by Bernadette Kuhn.
with Bernadette Kuhn

U.S.A., Colorado, Otero County: Comanche National Grassland: ca 4 air mi E of Colo Hwy 109, ca 8 air mi SE of La Junta.
Clayey slopes below sandstone caprock. Phenology: flowering & fruiting.
Annotated by Bernadette Kuhn.
with Bernadette Kuhn

U.S.A., Colorado, Otero County: Comanche National Grassland: ca 16 mi S of La Junta, ca 5 mi W of Vogel Canyon on bluffs above the junction of Forest Road 350 and Rourke Road.
On alluvial soil at the base of the ridge and with Sporobolus; shaley or Jurassic clay soil layer under the limestone. Phenology: flowering & fruiting.
Annotated by Bernadette Kuhn.

U.S.A., Colorado, Las Animas County: Comanche National Grassland: Purgatoire Canyon, northeast end.
Rimrock and slope below to flats along river. Phenology: flowering & fruiting.
with Bernadette Kuhn, Laura E. Lukas

U.S.A., Colorado, Otero County: [location and coordinates withheld]
Roadside and rocky hill. Phenology: flowering & fruiting.

U.S.A., Colorado, Fremont County: Wet Mountains, Wet Mountain Valley, Sangre de Cristo Range, and Vicinity: Temple Canyon Road, ca 3.5 air mi SW of Canon City (city center).
Rocky slopes and grasslands. Phenology: flowering & fruiting.
with Brian Elliott

U.S.A., Montana, Powder River County: Custer National Forest: Ashland District: Red Shale Campground and vicinity on U. S. Hwy 212 above East Fork Otter Creek, ca 6 air mi E of Ashland.
Forb and grass flats. Phenology: flowering & fruiting.
Accession: (unaccessioned), Barcode: USFS0050695

U.S.A., Montana, Powder River County: Custer National Forest: Ashland District: on the divide between East Fork Otter Creek and Wilbur Creek on Wilbur Creek (Forest Road 4775), ca 13 air mi E of Ashland.
Scoria-clinker ridge and slope with ponderosa pine. Phenology: fruiting.
Accession: USFS 887113, Barcode: USFS0052437

U.S.A., Montana, Rosebud County: Custer National Forest: Ashland Ranger District: King Mountain Hiking and Riding Area: in and around East Fork O' Dell Creek ca 2.5 air mi E of O' Dell Creek or Forest Road 4131, ca 12.5 air mi S of Ashland.
Grass and silver-sage dominated draw. Phenology: fruiting.
Accession: USFS 884522, Barcode: USFS0049610

U.S.A., Montana, Powder River County: S of U.S. Hwy 212 and E of Titus Creek, ca 22.5 air mi ESE of Ashland.
Grass-dominated grazing land interspersed with badlands. Phenology: fruiting.

U.S.A., Montana, Powder River County: 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.
In and around drainage and reservoir, dominated by sedges and grasses. Phenology: fruiting.
Accession: USFS 884523, Barcode: USFS0049611

U.S.A., Montana, Rosebud County: Custer National Forest: Ashland Ranger District: in and around Blacks Pond off of Forest Road 4021, ca 17 air mi S of Ashland.
Grass-dominated slope above reservoir. Phenology: fruiting.

U.S.A., Montana, Powder River County: 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.
Draw with green ash, juniper, and ponderosa pine. Phenology: flowering.

U.S.A., Montana, Powder River County: 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.
In and around grazed draw dominated by green ash, hawthorn, chokecherry, and Symphoricarpos. Phenology: fruiting.

U.S.A., Montana, Powder River County: 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.
Moist draw with quaking aspen, Prunus, and hawthorn. Phenology: fruiting.

U.S.A., Montana, Powder River County: Custer National Forest: Ashland Ranger District: in the vicinity of Forest Road 4516, ca 2 air mi W of Mont Hwy 484 or Otter Creek Road, ca 6.5 air mi NNW of Fort Howes.
Grass and sagebrush-dominated grazing land. Phenology: fruiting.

U.S.A., Montana, Phillips County: S of Content Road on ridge E of Horse Pasture Coulee, ca 3.5 air mi SW of Black Cow Reservoir, ca 22.5 air mi SSE of Malta.
Drainage bottom. Phenology: fruiting.
Joseph L. M. Charboneau, 1056. 7/5/2010.

U.S.A., Montana, Valley County: W of Larb Creek Road, in Black Coulee and ridge to the N, ca 3 air mi NW of Korman Reservoir, ca 36 air mi WSW of Glasgow.
Swales and creekside. Phenology: fruiting.
Joseph L. M. Charboneau, 1096. 7/5/2010.

U.S.A., Montana, Valley County: E of Skyview Ridge Road, ca 2.5 air mi E of Horace Reservoir, ca 21.5 air mi NNW of Glasgow.
Sagebrush-grasslands on clay soil. Phenology: fruiting.
Joseph L. M. Charboneau, 1601. 7/13/2010.

U.S.A., Montana, Powder River County: Custer National Forest. SMPM.
In clay soil; west slope. Phenology: vegetative only.
Accession: USFS 511845

Euphorbia spathulata ()
U.S.A., Nebraska:
848 is not specified as either, Accession #, nor collector # on lable. Phenology: flowering & fruiting.
Annotated by Steve Rolfsmeier in 1993.
, 848. //.

U.S.A., Montana, Custer County: Custer National Forest: Along Cow Creek Bottom.
On east facing slope; in black loam soil; in sagebrush. Rare. Phenology: vegetative only.

U.S.A., Montana, Custer County: Northern Rocky Mountain Forest and Range Experiment Station: Pasture E, near Quadrat E-3.
Pasture. Phenology: vegetative only.

U.S.A., Montana, Ravalli County: Along highway toward Dixon.
Along highway. Phenology: vegetative only.

U.S.A., Nebraska, Franklin County: Minden.
Phenology: vegetative only.
Annotated by Steve Rolfsmeier in 1993.
Harry Hapeman, s.n.. 5/30/1939.

U.S.A., Montana, Custer County: Northern Rocky Mountain (U.S.R.L. Exp. Sta.)
T6N R43E S3
In clay soil. Phenology: vegetative only.

U.S.A., South Dakota, Harding County: Little Missouri River Valley, 25 mi N of Ashcroft.
Open woods. Phenology: flowering & fruiting.

U.S.A., South Dakota, Perkins County:
Phenology: flowering.

U.S.A., Montana, Lake County: Ravalli.
Roadside. Phenology: vegetative only.

U.S.A., Montana, Big Horn County: Bighorn Canyon National Recreation Area: along Ok-aBeh Rail.
On red silt soil; below Marina well; associated with Poa pratensis, Bromus japonicus, Ambrosia trifida, Sonchusspp, Juncus longisylis. Uncommon. Phenology: vegetative only.

U.S.A., North Dakota: Medora: Badlands.

U.S.A., North Dakota, McKenzie County: Watford City.
Herbert C. Hanson, s.n.. 7/14/1932.

U.S.A., Montana, Phillips County: Charles M. Russell National Wildlife Refuge: hills N of outlet of Fourchette Creek into Fourchette Bay, E of Refuge Road 858, ca 3 air mi NNE of Fowler Reservoir, ca 39 air mi ESE of Zortman; ca 47 air mi SSE of Malta.
Grasslands with sagebrush on loamy to sandy hillsides. Phenology: flowering & fruiting.

U.S.A., Montana, Phillips County: American Prairie Reserve: Box Elder Creek and hills above, ca 4 air mi E of Indian Lake, ca 38.5 air mi ESE of Zortman; ca 44 air mi SSE of Malta.
Floodplain bottoms with greasewood on clay soil and riparian areas. Phenology: flowering & fruiting.
with Mark Majerus, Michael Dolan, Noorjahan Parwana, Katie Butts, and Mary Frieze

U.S.A., Montana, Phillips County: Charles M. Russell National Wildlife Refuge: CK Ridge, W of Refuge Road 206, ca 10 air mi ESE of Taint Reservoir, ca 24 air mi SE of Zortman; ca 52 air mi SSW of Malta.
Open, south-facing slopes. Phenology: flowering & fruiting.

U.S.A., Montana, Phillips County: Ridge E of Spring Creek, W of CK Ridge Road, ca 2.5 air mi E of Blizzard Reservoir, ca 18 air mi SE of Zortman; ca 48 air mi SSW of Malta.
Juniper thicket and coulee bottom. Phenology: flowering & fruiting.

U.S.A., Montana, Valley County: Charles M. Russell National Wildlife Refuge: N of Refuge Road 108, ca 6.5 air mi ENE of Willow Flat Reservoir, ca 6 air mi WSW of Fort Peck; ca 15 air mi SSE of Glasgow.
Big sagebrush steppe on badlands clay hills with large patches of yellow sweetclover. Phenology: fruiting.

U.S.A., Montana, Phillips County: American Prairie Reserve: North Fork White Rock Coulee, ca 4.5 air mi ESE of Little Warm Reservoir, ca 24.5 air mi ENE of Zortman; ca 24 air mi SSW of Malta.
Grassland hills with big sagebrush on clay to loamy soil. Phenology: fruiting.

U.S.A., Montana, Phillips County: 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.
Shallow draw on butte in ponderosa pine forest. Phenology: fruiting.

U.S.A., Montana, Valley County: Charles M. Russell National Wildlife Refuge: Middle Eighth Ridge, ca 2.5 air mi ENE of Graveyard Hill, ca 24 air mi SW of Fort Peck; ca 30 air mi SSW of Glasgow.
Grasslands with big sagebrush on clay. Phenology: fruiting.

U.S.A., Montana, Phillips County: Sand Hills: ca 3.5 air mi SSE of Silver Peak, ca 5.5 air mi SSW of Zortman; ca 49 air mi SW of Malta.
Sandstone ridge with occasional ponderosa pine, juniper, and big sagebrush. Phenology: fruiting.

U.S.A., Montana, Phillips County: Charles M. Russell National Wildlife Refuge: Mickey Butte, ca 4 air mi ENE of Dry Lake, ca 43 air mi ESE of Zortman; ca 54.5 air mi S of Malta.
Moist coulee bottoms. Phenology: fruiting.

U.S.A., Montana, Phillips County: UL Bend National Wildlife Refuge: Dry Lake along Refuge Road 897, ca 6 air mi SSE of Fish Fossil Reservoir, ca 40 air mi SE of Zortman; ca 56 air mi S of Malta.
Big sagebrush-grasslands on stony silty soil. Phenology: fruiting.

U.S.A., Montana, Phillips County: Charles M. Russell National Wildlife Refuge: Bell Ridge, E of CMR Auto Tour Route (Refuge Road 101), ca 2.5 air mi N of the Missouri River, ca 19 air mi S of Zortman; ca 60 air mi SW of Malta.
Open, dry, south-facing slope with big sagebrush and greasewood on clay to shale. Phenology: fruiting.

U.S.A., Colorado, Mesa County: Colorado River Valley: unnamed side canyon E of De Beque Canyon, N of Kimbell Mesa, ca 21 air mi ENE of Grand Junction.
Sandy, cobbly slopes with juniper. Phenology: flowering & fruiting.
Michael K. Kirkpatrick, 4784. 5/17/2011.

U.S.A., Colorado, Mesa County: 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.
Sagebrush meadow and slopes with scattered juniper and mixed grass-forb understory. Phenology: flowering.
Michael K. Kirkpatrick, 4916. 5/22/2011.

U.S.A., Colorado, Mesa County: 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.
Clay slopes and badlands with greasewood and shadscale. Phenology: flowering & fruiting.
Michael K. Kirkpatrick, 5084. 5/24/2011.

U.S.A., Montana, Rosebud County: Custer National Forest: Ashland Ranger District: King Mountain Hiking and Riding Area: in and around East Fork O' Dell Creek ca 2.5 air mi E of O' Dell Creek or Forest Road 4131, ca 12.5 air mi S of Ashland.
Grass and silver-sage dominated draw. Phenology: fruiting.
Accession: (unaccessioned), Barcode: USFS0050296

U.S.A., Montana, Powder River County: Custer National Forest: Ashland District: Red Shale Campground and vicinity on U. S. Hwy 212 above East Fork Otter Creek, ca 6 air mi E of Ashland.
Forb and grass flats. Phenology: flowering & fruiting.

U.S.A., Montana, Powder River County: Custer National Forest: Ashland District: on the divide between East Fork Otter Creek and Wilbur Creek on Wilbur Creek (Forest Road 4775), ca 13 air mi E of Ashland.
Scoria-clinker ridge and slope with ponderosa pine. Phenology: fruiting.

U.S.A., Colorado, Delta County: Uncompahgre Plateau: Escalante Canyon, McCarthy Trail, ca 11.5 air mi W of Delta.
Juniper grasslands on clay hillsides with sandstone mesa tops. Phenology: flowering & fruiting.
1. Euphorbia spathulata Lam..

U.S.A., Wyoming, Platte County: Camp Guernsey: ca 0.9 km NW of Rocky Pass, ca 1.6 km W of Webb Canyon Road.
Elev. 1500 m.
zone DMC, 520600E, 4687900N; unknown, GPS reading
Moderate to steep slopes; mixed juniper woodland and Cercocarpus scrubland; rocky loam with cryptogamic soil crust; drainage; with Juniperus scopulorum, Cercocarpus montanus, Yucca glauca, Gutierrezia sarothrae, Stipa spp. Locally common; erect, taprooted, annual herb; 6-10 cm tall; ovary warty. Phenology: flowering.
Carlos A. Popolizio, 662. 6/11/1996.
with Nancy E. Hasting, Rosalie M. Smith, Donald L. Hazlett

U.S.A., Wyoming, Platte County: Camp Guernsey: Walsh Ranch parcel in Deadhorse Canyon; east end of transect ca 1.5 km SW of Range Guard 4, ca 7.6 km NE of Guernsey Reservoir.
Elev. 1524 m.
Level; intermittent stream drainage recovering from fire; silty loam with cobbles; with Symphoricarpos occidentalis, Toxicodendron rydbergii, Silene antirrhinum, Tragopogon dubius, Descurainia pinnata, Ellisia nyctelea, Bromus tectorum, Poa pratensis. Scattered; erect, rhizomatous, perennial herb; 2 dm tall. Phenology: flowering & fruiting.
with P. Block

U.S.A., Colorado, Fremont County: East-central Colorado: Mosquito Range to Plains: Arkansas River Drainage: Twin Mountain off U.S. Hwy 50, ca 5.6 air mi NW of Canon City; ca 2 road mi from turnoff to Royal Gorge.
In a coarse sandy upland wash. Phenology: fruiting.