Oenothera serrulata (1997)
ONAGRACEAE
Oenothera serrulata Nutt.
U.S.A., Colorado, El Paso County: East-central Colorado: Mosquito Range to Plains: at scenic overlook on I-25, ca 1/3 air mi E of U. S. Air Force Academy airport, ca 9 air mi N of Colorado Springs.
Elev. 6580 ft.
Weedy, highly disturbed ground with sandy soils along roadway. Phenology: flowering.
with Randy Pratt
Accession: RM (unaccessioned)

Oenothera serrulata (2002)
ONAGRACEAE
Oenothera serrulata Nutt.
U.S.A., Wyoming, Niobrara County: Thunder Basin National Grassland and Vicinity: Old Woman Creek Hills, ca 2.5 air mi E of U.S. Hwy 85, ca 52 air mi S of Newcastle; ca 25 air mi NNE of Lusk.
Rocky slopes with little bluestem. Phenology: flowering & fruiting.
Peter J. Ebertowski, 1084. 7/3/2002.
Accession: RM (unaccessioned)

Oenothera serrulata (2002)
ONAGRACEAE
Oenothera serrulata Nutt.
U.S.A., Wyoming, Crook County: Thunder Basin National Grassland and Vicinity: Cracker Creek on County Road 68, ca 25 air mi NNE of Weston; ca 40 air mi NNE of Gillette.
Slope with little bluestem. Phenology: flowering & fruiting.
Peter J. Ebertowski, 1303. 7/7/2002.
Accession: RM (unaccessioned)

U.S.A., Wyoming, Weston County: Thunder Basin National Grassland and Vicinity: above and S of reservoir in gully leading to Robbers Roost Creek, on Cheyenne River or County Road 54, ca 24 air mi SSW of Newcastle; ca 44 air mi SSE of Upton.
Grassland with sandstone outcrops. Phenology: flowering & fruiting.
Peter J. Ebertowski, 733. 6/28/2002.

U.S.A., Wyoming, Weston County: 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.
Sandy slopes of creek bed. Phenology: flowering & fruiting.

U.S.A., Wyoming, Niobrara County: Thunder Basin National Grassland and Vicinity: southern edge of Buck Creek Hills, on Meridian or County Road 17, ca 24 air mi N of Lusk; ca 13 air mi ENE of Lance Creek.
Sandy slopes with rock outcrops. Phenology: flowering & fruiting.

U.S.A., Wyoming, Campbell County: Thunder Basin National Grassland and Vicinity: hills N of confluence of North Fork Duck Creek and Duck Creek, off dirt road to Dickinson Ranch, ca 39 air mi NNE of Gillette; ca 39 air mi NNW of Moorcroft.
Slopes forming ravine in silver sagebrush grassland. Phenology: flowering & fruiting.

U.S.A., Wyoming, Campbell County: Thunder Basin National Grassland and Vicinity: TA Buttes on two-track road off Union Chapel Road, ca 6 air mi SE of Gillette; ca 4.5 air mi S of Wyodak.
Sandy bowl. Phenology: flowering & fruiting.

U.S.A., New Mexico, Chaves County: Roswell, Fort Sumner.
T7S R23E S24
Sandy stoney slopes. Phenology: flowering.
Accession: RM 131313

U.S.A., New Mexico, Quay County: Tucumcari.
Elev. 4100 ft.
Highway. Phenology: flowering.
Annotations:
Annotated by Howard F. Towner in 1969.
Accession: RM 128138

U.S.A., South Dakota, Custer County: Buffalo Gap National Grassland and Vicinity: ca 19 air mi SE of Hermosa.
Elev. 3150 ft.
Butte tops and slopes of sand and gravel soil. Phenology: flowering.

U.S.A., Nebraska, Sioux County: Oglala National Grassland and Vicinity: ca 7-7.5 air mi NW of Crawford.
On pine ridge of gravel and sand; pine woodland. Phenology: flowering.

U.S.A., Nebraska, Sioux County: Oglala National Grassland and Vicinity: ca 13.5 air mi NNW of Crawford and ca 1 air mi NW of Eagles Eye Rock.
On pine ridge of rock and sand; pine woodland. Phenology: flowering.

U.S.A., Nebraska, Sioux County: Oglala National Grassland and Vicinity: ca 13 air mi NW of Crawford at Roundtop Mountain.
Mountain of pine in rock and sand soils pine woodland. Phenology: flowering.

U.S.A., Nebraska, Sioux County: Oglala National Grassland and Vicinity: ca 18-18.5 air mi NW of Crawford and 0.5 mi N of Orella Road, Whitehead Creek.
West side drainage of creek. Phenology: flowering.

U.S.A., Nebraska, Sioux County: Oglala National Grassland and Vicinity: ca 20.5-21 air mi NNW of Crawford.
Ridge of sand with plant diverse areas of moisture holding ridge "edge" slumps. Phenology: flowering.

U.S.A., South Dakota, Pennington County: Buffalo Gap National Grassland and Vicinity: ca 20.5-21 air mi SSW of Wall and 0.5 mi E of Forest Road 7133.
On east and south faces of revegetated and stabilized sand bluffs. Phenology: flowering.

U.S.A., South Dakota, Custer County: Buffalo Gap National Grassland and Vicinity: ca 17-17.5 air mi SE of Hermosa and 1.5-2 mi NNW of Red Shirt and 1-1.5 mi W of SD Hwy 40.
In draws and on ridge tops. Phenology: flowering.

U.S.A., Nebraska, Sioux County: Oglala National Grassland and Vicinity: ca 18 air mi NW of Crawford and 1/2-3/4 mi N of Orella Road in Whitehead Creek.
Soils are silty and moist. Associated plants growing in creek floor are Salix spp., Prunus virginiana and Ribes spp. Phenology: flowering.

U.S.A., Nebraska, Sioux County: Oglala National Grassland and Vicinity: ca 12.5-13 air mi NW of Crawford.
On rocky ridge and side slopes. Phenology: flowering.

U.S.A., Nebraska, Sioux County: Oglala National Grassland and Vicinity: ca 12.5-13 air mi NW of Crawford.
In deep drainage.

U.S.A., South Dakota, Fall River County: 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.
In gravel and sand. Phenology: buds.
with B. E. Nelson

U.S.A., South Dakota, Fall River County: Buffalo Gap National Grassland and Vicinity: along Moss Agate Creek, ca 8.5 air mi WNW of Edgemont and ca 5 air mi N of U.S. Hwy 18.
Upland slopes of alkali clay and gravel, draw of wet, mucky clay. Phenology: flowering.

U.S.A., South Dakota, Fall River County: Buffalo Gap National Grassland and Vicinity: ca 1 air mi NW of Slim Butte.
Eroded clay banks of ephemeral stream. Phenology: buds.

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: buds.

U.S.A., South Dakota, Pennington County: Buffalo Gap National Grassland and Vicinity: ca 2 air mi NW of Scenic, on mesa area overlooking Spring Creek.
Soil is sand. Phenology: flowering.

U.S.A., South Dakota, Pennington County: Buffalo Gap National Grassland and Vicinity: Indian Creek Wilderness Area: ca 4-4.5 air mi SW of Scenic.
On ridge top; soils are gravel and clay. Phenology: flowering.

U.S.A., New Mexico, Roosevelt County: 5 mi NE of Portales.
On sand dunes. Phenology: flowering.
Annotations:
Annotated by Howard F. Towner in 1969.
with C. L. Hitchcock
Accession: RM 162274

U.S.A., Arizona, Gila County: Tonto National Forest: Roosevelt pasture.
T4N R12E S21
Steep northeast slope; shallow rocky, clay loam; grass-browse-weed. Phenology: flowering.
Accession: USFS 517846

U.S.A., Wyoming, Laramie County: Wetlands and Adjacent Areas: Bear Creek, ca 9 air mi SSE of Chugwater.
Dry, rocky uplands. Phenology: flowering.

U.S.A., Wyoming, Crook County: Wetlands and Adjacent Areas: Redwater Creek, ca 2 air mi W of Beulah; ca 14 air mi NE of Sundance.
Dry sandy uplands. Phenology: flowering & fruiting.

U.S.A., Wyoming, Sheridan County: Wetlands and Adjacent Areas: Tongue River, ca 8 air mi SW of Ranchester.
Dry, rocky hillside. Phenology: flowering & fruiting.

U.S.A., Arizona, Navajo County: Ca 1 mi S of Holbrook.
T17N R21E S7
Sandstone outcrop, with four-wing saltbrush-grass-matchweed. Phenology: flowering.
with S. L. Welsh

U.S.A., Wyoming, Crook County: Sand Creek Canyon, S of Beulah.
44.5103° N, 104.1004° W; NAD 83, uncertainty 1 mi., Digital Map
Common, dry hillsides and cliffs. Corolla yellow. *south of Beulah* Phenology: flowering.
with Marjorie W. Porter
Accession: RM 281059, Barcode: RM0253602

U.S.A., Wyoming, Platte County: On the Oregon Trail at Warm Springs, 3 mi W of Guernsey.
42.2482° N, 104.7868° W; NAD 83, uncertainty 1 mi., Digital Map
Dry sandy stream bed. Flowers yellow. Phenology: flowering.
Accession: RM 215411, Barcode: RM0253649

U.S.A., Wyoming, Campbell County: Near Spotted Horse.
44.7083° N, 105.8387° W; NAD 83, uncertainty 2 mi., Digital Map
Rolling grassland hills; dry sandy soil. Flowers yellow. Phenology: flowering & fruiting.
with Marjorie W. Porter
Accession: RM 255875, Barcode: RM0253664

U.S.A., Wyoming, Crook County: Bear Lodge Range: 5 mi NE of Hulett.
On old road cuts in oak woods. Ocassional, flowers yellow. Phenology: flowering & fruiting.
with Marjorie W. Porter

U.S.A., New Mexico, Rio Arriba County: Santa Fe National Forest and Vicinity: Jemez Mountains: 1.5 air mi SSW of Chili towards Henry Spring; from road junction to S 0.3 air mi in a loop parallel to road.
15 deg, southeast-facing slope in pinyon/juniper woodland. Sedimentary. Phenology: flowering.

U.S.A., New Mexico, San Miguel County: Santa Fe National Forest and Vicinity: Sangre de Cristo Mountains: Anton Chico Grant: Forest Road 85 at northern forest boundary, 1.5 air mi S of Bernal. Within 0.3 air mi of N35.367 W105.310.
Broad grassy plain with scattered juniper, and roadside. Phenology: flowering.

U.S.A., Wyoming, Goshen County: Southeast Plains: Rawhide Creek, ca 15 mi N of Lingle, just W of Wyo Hwy 85.
Dense stand of Scirpus pungens and Elymus repens in floodplain on alluvial soil. Phenology: flowering.

U.S.A., Wyoming, Goshen County: Southeastern Plains: Wyoming Game and Fish Department Rawhide Unit: on north bank of North Platte River E of Lingle.
Savanna - like Populus deltoides community with sparse understory of Artemisia frigida, Opuntia polyacantha, and Stipa comata. Phenology: flowering.
with Steve Kettler

U.S.A., Wyoming, Platte County: Southeastern Plains: north bank of the North Platte River (Wyoming Game and Fish Department Rawhide Unit).
Populus deltoides community on north side of river with shrubby understory. Phenology: flowering.
Michele Barlow, 70. 6/7/1991.

U.S.A., Wyoming, Platte County: Camp Guernsey: 3.2 km NE of Sam Draw, 3.9 km S of Broom Creek.
Elev. 1573 m.
zone DMC, 522700E, 4698300N; unknown, GPS reading
Pine/juniper woodland on northwest-facing slope of silty loam with Pinus ponderosa, Juniperus scopulorum, Koeleria cristata, and Arenaria sp. Phenology: flowering & fruiting.
Patricia P. Douglas, 286. 6/27/1995.
with Rosalie M. Smith, Nancy E. Hastings

U.S.A., Wyoming, Goshen County: Fort Laramie National Historic Site.
Sandy prairie with Artemisia filifolia and Penstemon. Rare; yellow flowers. Phenology: flowering.

U.S.A., Wyoming, Platte County: Southeastern Plains: Spring Creek, ca 6.5 mi W of I-25 and 6 mi WSW of Glendo.
Populus angustifolia community on dry, sandy gravel floodplain with sparse understory of grasses and forbs. Phenology: flowering.

U.S.A., South Dakota, Lyman County: Rolling hills above U.S. Hwy 16, 4.5 mi W of Chamberlain.
Transition prairie in the Missouri River breaks. Annotation year 1969-70. Phenology: flowering.
Annotations:
Annotated by Howard F. Towner in 1969.
with G. W. Parmelee, Stella M. Wilson, and P. G. Coleman

U.S.A., South Dakota, Pennington County: 5 mi SW of Rapid City.
T1N R7E S29
Mixed praries, clay soil, 10% E slope, with Bouteloua gracilis, Stipa comata, Koeleria cristata association. Phenology: flowering.
Accession: USFS 517856, Barcode: USFS0069685

U.S.A., South Dakota, Fall River County: Black Hills, N of Hot Springs.
T7S R5E S12
Annotation year 1969-70. Phenology: flowering.

U.S.A., South Dakota, Harding County: Fuller Draw, North Cave Hills.
Grass and weed, 15% slope, sandy loam, grass and blue joint association. Phenology: flowering.
Accession: USFS 517855, Barcode: USFS0069684

U.S.A., South Dakota, Fall River County: Hot Springs, Hot Brook Creek.
Streamside; elm, willow, and hackberry association; mesophytic. Annotation year 1969-70. Phenology: flowering.

U.S.A., South Dakota, Fall River County: Hot Springs.
Red foothills; grass and sage association; xero-mesophytic. Annotation year 1969-70. Phenology: flowering.

U.S.A., South Dakota, Lawrence County: Deadwood; hills above Pine Crest.
Wooded slopes, yellow pine association. Annotation year 1969-70. Phenology: flowering.

U.S.A., South Dakota, Custer County: Hell Canyon, 8 mi NE of Dewey.
Rocky valley, grass and pioneer association; xerophytic. Annotation year 1969-70. Phenology: flowering.

U.S.A., South Dakota, Fall River County: Hot Springs.
Raliroad embankment. Annotation year 1969-70. Phenology: vegetative only.

U.S.A., South Dakota, Pennington County: Harney National Forest.
T6S R5E S6 SE1/4
In draws, clay loam soil, 4% northwest slope, common abundance, weed type. Phenology: flowering.
Accession: USFS 517852, Barcode: USFS0069683

U.S.A., South Dakota, Fall River County: Cottonwood Springs Creek drainage near Hot Springs.
Rocky red soil of prairie; Unamia alba and Solidago nemoralis association. Phenology: flowering.

U.S.A., South Dakota, Harding County: Shaw Creek, 20 mi N of Crook.
Steppe. Annotation year 1969-70. Phenology: flowering.

U.S.A., South Dakota, Perkins County: Lemmon.
Annotation year 1969-70. Phenology: flowering.

U.S.A., South Dakota, Pennington County: SE of Rapid City.
Red lands. Annotation year 1969-70. Phenology: flowering.

U.S.A., Colorado, Yuma County: J. Conrad property, N of Wray, 5.5 mi N of Hwy 34, 1 mi E of County Road BB, Eckley NE Quadr.
T2N R44W S7
Sand hills. Phenology: flowering.

U.S.A., New Mexico, San Juan County: US Highway 666, 22.7 miles south of Shiprock.
Growing with Meliotus indica and alfalfa. Phenology: flowering.

U.S.A., Colorado, Baca County: Commanche National Grassland: Campo Research Natural Area; W of U.S. Hwy 385; 3.5 mi S of Campo.
Loamy fine sand; 290 degree aspect; 3% slope; at the edge of a Bouteloua gracilis-Sitanion hystrix Grassland; 40-50 plants present in a 5 meter square area. Phenology: flowering.

U.S.A., Colorado, Larimer County: Pennocks' Mountain Ranch.
Phenology: flowering.

U.S.A., Colorado, Baca County: Commanche National Grassland: approximately 45 miles SW of Springfield.
T35S R48W S8
Upper sand canyon. Phenology: flowering.
Accession: USFS 517842

U.S.A., Colorado, No county County:
Phenology: flowering.
Earl L. Johnston, s.n.. //1906.

U.S.A., Colorado, Weld County: Grover, CO.
Creek bottom. Phenology: flowering.

U.S.A., Colorado, El Paso County: Monument, CO.
Roadsides. Phenology: flowering & fruiting.
with George G. Hedgcock

U.S.A., Colorado, El Paso County: Monument, CO.
Roadsides. Phenology: flowering & fruiting.

U.S.A., Colorado, Boulder County: Near Boulder.
Elev. 1700 m.
In dry soil. Phenology: flowering.

U.S.A., Colorado, Boulder County: Near Boulder.
Phenology: flowering.
Francis Ramaley, a55. 6//1899.

U.S.A., Colorado, Logan County: Sterling.

U.S.A., Colorado, Yuma County: Wray.

U.S.A., Colorado, El Paso County: Palmer Lake.
George E. Osterhout, 672. 7/21/1895.

U.S.A., Colorado, Denver County: S of Denver.

Oenothera serrulata ()
U.S.A., Colorado, Elbert County: Burlington to Limon.
Annotated by B. E. Nelson in 1979.
George E. Osterhout, s.n.. 7/16/.

U.S.A., Colorado, Sedgwick County: Julesburg.
Annotated by B. E. Nelson in 1979.
George E. Osterhout, s.n.. 7/9/1914.

U.S.A., Colorado, Sedgwick County: Julesburg.
George E. Osterhout, s.n.. 7/9/1914.

U.S.A., Colorado, Douglas County: Wolhurst.
Elev. 1616 m.
Dry hills. Phenology: flowering.

U.S.A., Colorado, El Paso County: Pikes Peak Region.
Open sandstone slopes. Phenology: vegetative only.

U.S.A., Colorado, El Paso County: Monument.
On open road grade. Phenology: flowering & fruiting.
Annotated by Harold D. Harrington in 1949.

U.S.A., Colorado, Boulder County: Colorado Tallgrass Prairie Natural Area: Parcel 7, S of Boulder at the beginning of Highway 93.
Xeric tallgrass community; moderately steep terraces, soil very cobble-like and sandy. Phenology: flowering.
Kanya Santanachote, 158. 6/6/1989.

U.S.A., Colorado, Weld County:
T10N R66W S12
In sandy soil. Phenology: flowering.
Annotated by Philip A. Munz in 1945.
1.
Annotated by Robert F. Martin in 1945.
Accession: USFS 517841

U.S.A., Colorado, Elbert County: Four miles southwest of Limon.
On the plains. Phenology: flowering.

U.S.A., Colorado, Kiowa County: Five miles north Eads.
Sandy plains. Phenology: flowering.

U.S.A., Colorado, Douglas County: One mile south of Larkspur.
In a conifer habitat in gravelly soil. Phenology: flowering.
1.
Annotated by Harold D. Harrington in 1969.
with Beetle

U.S.A., Colorado, Boulder County: Bluebell Canyon.
Phenology: flowering & fruiting.

U.S.A., Colorado, Boulder County: Near Boulder.
On a mesa. Phenology: flowering & fruiting.

U.S.A., Wyoming, Converse County: Laramie Range: Freds Draw, ca 4.5 air mi NW of Esterbrook.
In dry creek bed. Phenology: flowering & fruiting.
with T. McGowan

U.S.A., Wyoming, Platte County: Laramie Range: ca 6 road mi from Glendo on County Road 614.
Along roadside and in canyons. Phenology: flowering & fruiting.
with T. McGowan & T. Freeman

U.S.A., Wyoming, Platte County: Southern Powder River Basin/Southeastern Plains: Hartville Uplift: ca 4.5 air mi NNW of Guernsey, ca 2 mi W of Hartville in Guernsey State Park, Deadman's Gulch.
In dry wash in crack in stone (limestone?). Common. Phenology: flowering & fruiting.
with Paul Ehrmann

U.S.A., Wyoming, Sheridan County: Big Horn Mountains: at the mouth of Wolf Creek Canyon above Wolf Post Office (Eaton Ranch), ca 7.5 air mi S of Dayton, ca 15 air mi W of Sheridan.
Brushy slopes. Phenology: flowering.

U.S.A., Wyoming, Crook County: [location and coordinates withheld]
Roadcut in grassland.

U.S.A., Wyoming, Platte County: Southern Powder River Basin/Southeastern Plains: Goshen Hole: Dickinson Hill; on north rim of Goshen Hole, ca 13 air mi SE of Wheatland.
Eroded, sandy breaks, draws and gullies with juniper. Phenology: flowering & fruiting.

U.S.A., Wyoming, Platte County: Hartville Uplift: Patten Creek, ca 16 air mi SSE of Glendo.
Open slopes of mesas above creek. Phenology: flowering & fruiting.

U.S.A., Wyoming, Campbell County: Powder River Basin: along Eightyfive Divide; ca 7 air mi S of Montana, 5 mi E of Hwy 59.
Rolling plains and sandstone outcrops; slopes. Phenology: flowering.
with Ronald L. Hartman and Mary Alice Sanguinetti.

U.S.A., Wyoming, Campbell County: [location and coordinates withheld]
Roadside, plains, ridge; ridge. Phenology: flowering.
with Mary Alice Sanguinetti

U.S.A., Wyoming, Niobrara County: Powder River Basin: Indian Creek, ca 7 air mi NW of Whitman.
42.9234° N, 104.2415° W; NAD 83, uncertainty 1 mi., Nat. Geog. TOPO!
On sandy soil of draws along creek, with gramma grass. Phenology: flowering.

U.S.A., Wyoming, Niobrara County: Powder River Basin: ca 4 air mi W of Lance Creek.
Sandstone outcrops. Phenology: flowering.

U.S.A., Wyoming, Sheridan County: Big Horn Mountains: ca 3 air mi SSW of Dayton.
Ridge with sandy lower slopes and stream bottom, Gypsum springs and Chugwater formations. Phenology: flowering.

U.S.A., Wyoming, Platte County: Southern Powder River Basin/Southeastern Plains: Southeastern Plains: I-25, 3.7 mi SN of Dwyer Junction (turn-off to Torrington).
Sandy roadside. Common. Phenology: flowering.

U.S.A., Wyoming, Sheridan County: Powder River Basin: U.S. Hwy 14, 4 mi SW of Dayton.
Limy soil along highway. Phenology: flowering.

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: Eighty-five Divide, ca 11 air mi W of Rockypoint.
Hills with sandstone outcrops. Phenology: flowering.
with Keith Dueholm and Mary Alice Sanguinetti

U.S.A., Wyoming, Campbell County: Powder River Basin: Eighty-five Divide, ca 10 air mi W of Rockypoint.
Hills with eroded drainage and sandstone outcrops. Phenology: flowering.
with Keith Dueholm and Mary Alice Sanguinetti

U.S.A., Wyoming, Goshen County: Southern Powder River Basin/Southeastern Plains: Southeastern Plains: above Horse Creek just N of Laramie County, ca 12 air mi SW of La Grange; ca 36 air mi SSW of Torrington.
Sparsely vegetated slopes of draw in rough breaks leading to creek bottom. Phenology: flowering.

U.S.A., Wyoming, Goshen County: Southern Powder River Basin/Southeastern Plains: Southeastern Plains: along Horse Creek and adjacent plains W of County Road 191, ca 4 air mi S of La Grange; ca 34 air mi S of Torrington.
Steep sparsely vegetated slopes below mixed grass plains. Phenology: flowering.

U.S.A., Wyoming, Goshen County: 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.
On and around sandstone cliffs and outcrops. Phenology: flowering.

U.S.A., Wyoming, Laramie County: [location and coordinates withheld]
Steep slopes with outcrops and scattered juniper and ponderosa pine. Phenology: flowering.

U.S.A., Wyoming, Laramie County: [location and coordinates withheld]
On and around a rock outcrop. Phenology: flowering.

U.S.A., Wyoming, Platte County: [location and coordinates withheld]
Stony slopes and flats in ponderosa pine woodland. Phenology: flowering & fruiting.

U.S.A., Wyoming, Goshen County: Southern Powder River Basin/Southeastern Plains: Goshen Hole Rim: between Lone Tree Canyon and Castle Rocks off County Road 155, ca 8-8.5 air mi SW of Hawk Springs; ca 27 air mi SSW of Torrington.
On sandstone outcrops. Phenology: flowering & fruiting.

U.S.A., Wyoming, Platte County: 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.
Steep cobblestone slopes. Phenology: flowering & fruiting.

U.S.A., Wyoming, Goshen County: Southern Powder River Basin/Southeastern Plains: Southeastern Plains: S of the head of Hefflen Draw, ca 1.5 air mi ENE of the eastern three Buttes, ca 6.5 air mi SSE of Lingle; ca 7.3 air mi WSW of Torrington.
Edges and bottoms of gullies below outcrops. Phenology: flowering & fruiting.

U.S.A., Wyoming, Converse County: Southern Powder River Basin/Southeastern Plains: Southern Powder River Basin: on the divide between Archie Draw, Coal Draw and Middle Creek just W of Cow Creek Buttes, ca 14 air mi ENE of Bill; ca 40.5 air mi NE of Douglas.
Top of slope with areas of exposed sandstone and ponderosa pine. Phenology: flowering & fruiting.

U.S.A., Wyoming, Goshen County: Southern Powder River Basin/Southeastern Plains: Southeastern Plains: just off the southwest corner of Harmony Heights between Deer and Cherry creeks ca 8.5 air mi SW of Fort Laramie; ca 21.3 air mi W of Torrington.
Rough breaks of sandy slopes, outcrops and draws with juniper, mountain mahogany and some ponderosa pine. Phenology: flowering.

U.S.A., Wyoming, Platte County: Southern Powder River Basin/Southeastern Plains: Hartville Uplift: along Cottonwood or County Road 42 ca 1.5 air mi S of Cottonwood Creek, ca 9 air mi W of Guernsey; ca 15 air mi N of Wheatland.
Mixed grass grassland with sand-, clay-, and siltstone outcrops. Phenology: flowering & fruiting.

U.S.A., Wyoming, Laramie County: Southern Powder River Basin/Southeastern Plains: Southeastern Plains: along I-25 ca 1 1/4air mi S of Little Bear or Exit 39, ca 27 air mi N of Cheyenne.
Sandstone ridge with mountain mahogany on rolling plains. Phenology: flowering.

U.S.A., Wyoming, Goshen County: Southern Powder River Basin/Southeastern Plains: Hartville Uplift: along a draw leading into Rawhide Creek ca 1 mi W of Middle Rawhide Butte, ca 11 air mi NW of Jay Em; ca 38.5 air mi NW of Torrington.
Stony, gravelly wash. Phenology: flowering & fruiting.

U.S.A., Wyoming, Niobrara County: Southern Powder River Basin/Southeastern Plains: Hartville Uplift: along a triburtary of Silver Springs Creek on Silver Springs or County Road 54, ca 8.5 air mi SSW of Lusk.
Bottom of a rocky draw. Phenology: flowering & fruiting.

U.S.A., Wyoming, Niobrara County: Southern Powder River Basin/Southeastern Plains: Southeastern Plains: breaks N of Muddy Creek along Spanish Diggings or County Road 34, ca 20.5 air mi WSW of Lusk, ca 7.5 air mi SW of Keeline.
Slopes, draws and flats in the rough breaks. Phenology: flowering.

U.S.A., Wyoming, Goshen County: Southern Powder River Basin/Southeastern Plains: Southeastern Plains: Fort Laramie National Historic Site: along the Laramie River W of the fort ca 2.5 air mi WSW of Fort Laramie (town); ca 21.5 air mi WNW of Torrington.
Gravelly flood plain with scattered trees. Phenology: flowering & fruiting.
with David Reilly

U.S.A., Wyoming, Platte County: Southern Powder River Basin/Southeastern Plains: Southeastern Plains: ca 0.5 mi S of Horseshoe Creek along Horseshoe Creek or County Road 59 ca 15.5 air mi SW of Glendo; ca 27.5 air mi NNW of Wheatland.
At the edge of pavement and on the right-of-way. Phenology: flowering & fruiting.

U.S.A., Wyoming, Converse County: Southern Powder River Basin/Southeastern Plains: Southeastern Plains: Warm Springs Hill, ca 7 air mi S of Douglas.
Redbeds with strata of anhydrous gypsum; juniper woodland and grassland. Phenology: flowering & fruiting.

U.S.A., Wyoming, Platte County: Southern Powder River Basin/Southeastern Plains: Southeastern Plains: ca 14 air mi SSE of Esterbrook.
Sandy plains. Phenology: flowering & fruiting.

U.S.A., Wyoming, Platte County: [location and coordinates withheld]
Sandstone outcrops and sandy slopes; ponderosa pine and grasslands. Phenology: flowering & fruiting.

U.S.A., Wyoming, Platte County: Southern Powder River Basin/Southeastern Plains: Southeastern Plains: ca 7.5 air mi W of Wheatland.
Short-grass prairie. Phenology: flowering & fruiting.

U.S.A., Wyoming, Platte County: Southern Powder River Basin/Southeastern Plains: Southeastern Plains: ca 9.5 air mi W of Wheatland.
Short-grass prairie and drainage. Phenology: flowering & fruiting.

U.S.A., Wyoming, Platte County: Southern Powder River Basin/Southeastern Plains: Southeastern Plains: ca 7 air mi E of Albany County.
Sandy slopes. Phenology: flowering & fruiting.

U.S.A., Wyoming, Platte County: [location and coordinates withheld]
Calcareous slopes and sandy flats. Phenology: flowering & fruiting.

U.S.A., Wyoming, Platte County: Southern Powder River Basin/Southeastern Plains: Southeastern Plains: Johnson Reservoir 3, ca 6 air mi NNW of Wheatland.
Sandy slopes and lake margin. Phenology: flowering & fruiting.

Sandy slopes. Phenology: flowering & fruiting.

U.S.A., Wyoming, Platte County: Southern Powder River Basin/Southeastern Plains: Southeastern Plains: Wyo Hwy 34 and I-25 interchange, ca 7 mi S of Wheatland.
Sandy slopes and stream bottom. Phenology: flowering & fruiting.

U.S.A., Wyoming, Platte County: Southern Powder River Basin/Southeastern Plains: Southeastern Plains: ca 2 mi E of Slater on breaks.
Sandstone outcrops and sandy slopes. Phenology: flowering & fruiting.

U.S.A., Wyoming, Crook County: [location and coordinates withheld]
Cliff (Minnekahta limestone). Phenology: flowering & fruiting.
with Dennis Horning

U.S.A., Wyoming, Crook County: [location and coordinates withheld]
Roadcut in grassland. Phenology: flowering & fruiting.

Grassland on rocky soil. Phenology: flowering & fruiting.

U.S.A., Wyoming, Weston County: Black Hills: west side of ridge S of Elk Mountain (USFS Road 818) near Mix Spring, ca 13.5 air mi SE of Newcastle.
Southeast-facing slope with scattered pines and junipers. Phenology: flowering & fruiting.

Plains, sandy slopes, sandstone outcrops; outcrops. Phenology: flowering & fruiting.

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

U.S.A., Wyoming, Crook County: Black Hills: ca 3 air mi NNE of Beulah.
Prairie and breaks with dry stream; sandy slopes. Phenology: flowering & fruiting.

U.S.A., Wyoming, Crook County: Black Hills: ridge between Beaver Creek and the Belle Fourche River, ca 5 air mi NNW of Alva.
Sandy ridge with Ponderosa pine woodlands and prairies; prairie. Phenology: flowering & fruiting.

U.S.A., Wyoming, Crook County: Black Hills: ca 8.5 air mi SE of Hulett.
Wooded stream drainage and sandy prairie; prairie. Phenology: flowering & fruiting.

U.S.A., Wyoming, Crook County: Black Hills: Green Mountain, ca 3 air mi E of Sundance.
Plains with outcrops of Chugwater red beds, Pinus ponderosa covered mountain slopes and summit, and moist shaded limestone canyon; prairie. Phenology: flowering & fruiting.

U.S.A., Wyoming, Crook County: Black Hills: ca 4 air mi NW of summit of Inyan Kara Mountain.
Sagebrush slopes on red beds with moist drainage. Phenology: flowering & fruiting.

U.S.A., Wyoming, Crook County: Black Hills: ca 7.5 air mi SE of Sundance.
Pinus ponderosa covered ridge and open sandy slopes. Phenology: flowering & fruiting.

U.S.A., Wyoming, Crook County: Black Hills: lower slopes of Hooker Peak and plains to the NW, 7-8 air mi SSE of Sundance.
Plains, Pinus ponderosa wooded slopes, moist open drainages and stock pond; plains and open slopes with some limestone outcrops. Phenology: flowering & fruiting.

U.S.A., Wyoming, Crook County: Sundance Creek.
Phenology: flowering & fruiting.

U.S.A., Wyoming, Crook County: Sundance.
Dry gravel slopes. Phenology: flowering & fruiting.

U.S.A., Wyoming, Crook County: Beulah.
Northern foothills and red beds; grass association; xerophytic. Phenology: fruiting.

U.S.A., Kansas, Morton County: Cimarron National Grassland: along Cimarron River, ca 12.5 air mi NE of Elkhart.
Cottonwood gallery forest. Sandy soil. Stands of Tamarix along river bank. Phenology: flowering & fruiting.
1. Oenothera serrulata Nutt.
Annotated by Bernadette Kuhn.

U.S.A., Colorado, Baca County: Comanche National Grassland: off County Road 8 at the head of Pat Canyon, ca 8 air mi N of Oklahoma and ca 2.5 air mi S of the abandoned Kirkwell Post Office, ca 27 air mi SW of Springfield.
Sandy cobblestone draws, abandoned gravel pit, and flats above. Phenology: flowering & fruiting.
1. Oenothera serrulata Nutt.
Annotated by B. E. Nelson.
with Bernadette Kuhn

U.S.A., Colorado, Baca County: Comanche National Grassland: at the intersection of County roads 13 and U, ca 8.5-9 air mi S of Pritchett; ca 16.5 air mi SW of Springfield.
Sandsage rangeland with large areas of Bromus tectorum and areas of barren sand. Phenology: flowering & fruiting.
1. Oenothera serrulata Nutt.
Annotated by B. E. Nelson.
with Bernadette Kuhn

U.S.A., Kansas, Morton County: Cimarron National Grassland: along Cimarron River and Turkey Trail ca 1 air mi E of Kan Hwy 27, ca 8.5 air mi N of Elkhart.
Low sand dunes in the river bottom, with scattered cottonwood. Phenology: flowering & fruiting.
Annotated by B. E. Nelson.

U.S.A., Colorado, Baca County: Comanche National Grassland: Sand Canyon, ca 0.5 air mi N of Oklahoma, ca 15.5 air mi WSW of Campo.
Mature cottonwood forest with scattered juniper on sand or sandy silt substrate. Phenology: flowering & fruiting.

U.S.A., Colorado, Baca County: Comanche National Grassland: branch of West Ute Canyon, ca 1 1/4 mi E of County Road 24, ca 5.5 air mi SSW of Campo.
Sandy to sandy silt rangeland. Phenology: flowering & fruiting.
with Bernadette Kuhn

U.S.A., Colorado, Baca County: Comanche National Grassland: ca 26.5 air mi SSW of Springfield.
With Yucca and Chrysothamnus. Phenology: flowering.
Annotated by Bernadette Kuhn.
Bernadette Kuhn, 887. 6/7/2007.

U.S.A., Colorado, Baca County: Comanche National Grassland: ca 25 air mi SW of Springfield.
With Stipa and Yucca glauca. Phenology: flowering & fruiting.
Annotated by Bernadette Kuhn.
Bernadette Kuhn, 893. 6/7/2007.

U.S.A., Colorado, Baca County: Comanche National Grassland: just N of the North Fork Cimarron River, ca 15 air mi SSE of Vilas.
Shortgrass prairie dominated by Buchloë dactyloides and Bouteloua spp. Phenology: flowering & fruiting.

U.S.A., Colorado, Baca County: Comanche National Grassland: Carrizo Canyon.
Lush canyon dominated by Rhus aromatica. Phenology: flowering & fruiting.

U.S.A., Colorado, Baca County: Comanche National Grassland: North Ute Canyon, 27 air mi S of Springfield.
Rocky upland area with Yucca and Opuntia. Phenology: flowering & fruiting.
with B. E. Nelson

U.S.A., Colorado, Baca County: Comanche National Grassland: North Picket House Draw, 7 air mi SE of Campo.
Shortgrass praire dominated by Buchloë dactyloides and Bouteloua sp. Phenology: flowering & fruiting.
with B. E. Nelson

U.S.A., Colorado, Baca County: Comanche National Grassland: 5 air mi E of Campo on County Road J.
Sandsage prairie. Phenology: flowering & fruiting.

U.S.A., Colorado, Baca County: Comanche National Grassland: Carrizo Canyon, ca 28.5 air mi SW of Springfield.
Lush canyon dominated by Rhus aromatica and Yucca glauca. Phenology: flowering & fruiting.
with Amy Tomson

U.S.A., Kansas, Morton County: Cimarron National Grassland: 1 mi W of Kans Hwy 27, ca 5 air mi N of Elkhart.
Sandsage prairie with rolling dunes dominated by Yucca glauca and Opuntia. Phenology: flowering.

U.S.A., Kansas, Morton County: Cimarron National Grassland: along Forest Road 627, ca 0.5 air mi N of Cimarron River, ca 10.5 air mi NNE of Elkhart.
Rolling sandsage prairie, dominated by Yucca glauca and Artemisia. Phenology: flowering.
with Joe Rankin

U.S.A., Colorado, Las Animas County: Comanche National Grassland and Vicinity: along County Road 34, ca 13 air mi E of Kim.
Right of way in sandy prairie dominated by Artemisia filifolia. Phenology: flowering & fruiting.

U.S.A., Colorado, Baca County: Comanche National Grassland: ca 4 air mi S of Liberty; ca 12 air mi SW of Springfield.
Pasture dominated by Artemisia filifolia. Phenology: flowering & fruiting.

U.S.A., Colorado, Baca County: Comanche National Grassland: at radio tower and Mt. Carmel Cemetary, ca 11 air mi ESE of Campo.
Sandy prairie dominated by Yucca glauca and Bothriochloa laguroides. Phenology: flowering & fruiting.

U.S.A., Colorado, Baca County: Comanche National Grassland: at intersection of County Road 25 and two-track road, ca 3 air mi SW of Campo.
Blowouts and sandy rolling hills dominated by Artemisia filifolia and Yucca glauca. Phenology: flowering.
with Joe Rankin

U.S.A., New Mexico, Union County: Kiowa National Grassland: Forest Road K34, 8 air mi SE of Clayton.
Along dry creek bed (riparian)on steppe. Phenology: flowering.
Michael Schiebout, 7697. 7/19/2005.

U.S.A., New Mexico, Union County: Kiowa National Grassland: Forest Road K81, 14 air mi NNE of Clayton.
Steppe, sandy soil. Phenology: flowering & fruiting.
Michael Schiebout, 6886. 6/29/2005.

U.S.A., New Mexico, Union County: Kiowa National Grasslands: Forest Road K24, 10 mi S of Clayton on NM Hwy 402.
Shortgrass prairie. Phenology: flowering.
Michael Schiebout, 2803. 8/11/2004.

U.S.A., Montana, Musselshell County: Golf Course Road, ca 13.5 air mi W of Roundup, ca 1.5 air mi E of junction with Timber Butte Road.
46.5041° N, 108.8497° W; NAD 83, uncertainty 0.25 mi., GPS reading
Rocky draw running SW to NE; very dry, scattered Pinus ponderosa; limestone and shale cliffs. Phenology: flowering.
1. Oenothera serrulata Nutt..

U.S.A., South Dakota, Harding County: Custer National Forest: North Cave Hills: near the head of Schleichart Draw ca 0.5 air mi W of Riley Pass, ca 18 air mi N of Buffalo.
In thin soil over sandstone pavement and thin Uranium bearing bed above sandstone cliffs. Phenology: flowering & fruiting.

U.S.A., South Dakota, Harding County: S of SD Hwy 20 ca 3.5 air mi ESE of Jumpoff Divide, ca 9.5 air mi W of Buffalo.
Grass-dominated open, rolling grazing land. Phenology: flowering.

U.S.A., South Dakota, Harding County: Ca 2.5 air mi N of SD Hwy 20, ca 4.5 air mi NE of Camp Crook near Johnson Butte.
Grass-dominated open, rolling grazing land. Phenology: flowering.

U.S.A., South Dakota, Harding County: Custer National Forest: Slim Buttes: in and around draws SE of junction of North Divide or Forest Road 3125 and Forest Road 3145 in the vicinity of Camp Spring, ca 4.5 air mi S of Reva Gap, ca 19 air mi ESE of Buffalo.
Draw dominated by green ash and aspen. Phenology: flowering & fruiting.

U.S.A., Montana, Powder River County: Ca 0.5 air mi E of Mont Hwy 484 or Otter Creek Road, ca 6.5 air mi N of Fort Howes and ca 15 air mi SSE of Ashland.
Grass-dominated grazing land. Phenology: flowering & fruiting.

U.S.A., South Dakota, Harding County: Custer National Forest: Slim Buttes: in the vicinity of Rimrock Spring, ca 1 air mi S of Forest Road 3151, ca 7.5 air mi SE of Summit Pass on SD Hwy 79 and ca 31 air mi SE of Buffalo.
Grass-dominated butte top with occasional hardwood draws. Phenology: flowering & fruiting.

U.S.A., Montana, Carter County: Custer National Forest: Ekalaka Hills: in the vicinity of Russel Spring just S of Camp Needmore off of Forest Road 3104, ca 6.5 air mi SE of Ekalaka.
Moist riparian area dominated by grasses. Phenology: flowering & fruiting.

U.S.A., South Dakota, Harding County: Custer National Forest: South Cave Hills: in and around McKenzie Gulch, S of Forest Road 3113, ca 10 air mi N of Buffalo.
On and near sandstone rim of butte, dominated by grasses and ponderosa pine. Phenology: flowering & fruiting.

U.S.A., South Dakota, Harding County: Custer National Forest: North Cave Hills: in a tributary of Schleichart Draw above Schleichart Draw Reservoir, W of Forest Road 3130, ca 17 air mi NNE of Buffalo.
Grass and chokecherry-dominated east-facing slope with rock outcrops. Phenology: flowering & fruiting.
with G. Gust

U.S.A., Montana, Carter County: Custer National Forest: Ekalaka Hills: in and E of Stagville Draw on Forest Road 3813 at Stagville Spring, SE past Forest Road 3813B to east boundary of Forest, ca 5.5 air mi SSE of Ekalaka.
Green ash and Prunus spp.-dominated draw. Phenology: fruiting.
with G. Gust

U.S.A., Montana, Powder River County: To ca 1.5 air mi NW of Moorehead Road, ca 4.5 air mi WSW of Broadus.
Grass and sagebrush-dominated grazing land with scattered badlands. Phenology: flowering & 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.
Near rock outcrop among grass and sagebrush-dominated grazing land. Phenology: flowering.
Accession: (unaccessioned), Barcode: USFS0049993

U.S.A., Montana, Powder River County: 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.
Grass and sagebrush-dominated grazing land with some moist draws and scattered small areas of badlands. Phenology: flowering & 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.
Rocky and sandy south-facing slope with scattered grasses, ponderosa pine, and juniper. Phenology: flowering & fruiting.

U.S.A., Montana, Phillips County: Larb Hills (South): at the head of Telegraph Creek, ca 47 air mi S of Saco; ca 44 air mi SSE of Malta.
Flats in the valley bottom. Phenology: flowering & fruiting.

U.S.A., Montana, Valley County: Larb Hills (North): W of South Bench Road, Tank Coulee and ridge above it, ca 4 air mi ENE of Ashford Spring, ca 2 air mi SSW of Hinsdale; 25 air mi NW of Glasgow.
Wooded drainage bottom. Phenology: flowering.
Joseph L. M. Charboneau, 916. 7/1/2010.

U.S.A., Montana, Phillips County: E of Harb Road, in Guston Coulee and on ridge to the N, ca 4.5 air mi SW of Regal Springs, ca 17 air mi ESE of Malta.
Loamy coulee bottom. Phenology: flowering & fruiting.
Joseph L. M. Charboneau, 998. 7/5/2010.

U.S.A., Montana, Valley County: Rock Creek Canyon, ca 5.5 air mi NW of Abey Reservoir, ca 14 air mi NNE of Hinsdale; ca 32 air mi NW of Glasgow.
Grasslands on sandy soil. Phenology: flowering.
Joseph L. M. Charboneau, 1171. 7/7/2010.

U.S.A., South Dakota, Minnehaha County: Corson.
Rocky hillside. Phenology: flowering.
Wilhelm G. Solheim, 56. 6/15/1923.

U.S.A., South Dakota, Brookings County: Near Brookings.
Ravines. Phenology: flowering.

U.S.A., South Dakota, Faulk County: Along Highway 212, 3 mi E of Faulkton.
High transition prairie. Phenology: flowering.
with G. W. Parmelee, Stalla M. Wilson, P. G. Coleman.

U.S.A., Nebraska, Kimball County: 8 mi SW of Bushnell.
On chalky outcrop with Calylophus, Eriogonum alatum. Phenology: flowering.

U.S.A., Nebraska, Scotts Bluff County: Wildcat Hills Rest Area: 1/2 mi N of the Banner County line, along a walking path.
Grassland area with conifers. Phenology: flowering.

U.S.A., Nebraska, Kimball County: 2.5 mi W of the Kimball Interchange on I-80.
Rocky slopes of a dry sandy wash. Phenology: flowering.

U.S.A., Nebraska: Kearnes.
Jesse H. Holmes, s.n.. //1889.

U.S.A., Nebraska, Dawes County: Chadron State Park, 9 mi S of Chadron.
Sandy hills. Phenology: flowering.

U.S.A., Nebraska, Scotts Bluff County: Carter Canyon Road.
Silty bank; with Hymenoppaus, Astragalus. Phenology: flowering.

Oenothera serrulata ()
U.S.A., Nebraska, Gage County:
W. C. Knight, s.n.. //.

U.S.A., Nebraska, Sheridan County: Metcalf Public Hunting Grounds: 13 mi N of Hay Springs.
Open ridges and Pinus ponderosa forest; south-facing slope near bottom. Phenology: flowering.

U.S.A., Nebraska, Rock County: Highway 20: 1.4 mi W of Newport.
with Findley Ownbey

U.S.A., Nebraska: Minden.
Harry Hapeman, s.n.. 6/7/1930.

U.S.A., Nebraska: Minden.
Harry Hapeman, s.n.. 7//1900.

U.S.A., Nebraska, Kearney County: Minden.
Carrie Hapeman, s.n.. 5/31/1891.

U.S.A., Nebraska:

U.S.A., Nebraska, Lincoln County: North Platte.

U.S.A., Nebraska, no county County: Nebraska National Forest.
Theodore Krueger, 9. 6/4/1914.

U.S.A., Nebraska, no county County: Nebraska National Forest.
Theodore Krueger, 113. 6/4/1914.

U.S.A., Nebraska, Thomas County: Nebraska National Forest.
T22N R26W S14
Sandy soil; sandhills prairie Phenology: flowering.

U.S.A., Montana, Custer County: Northern Rocky Mountain Forest and Range Experiment Station (U.S. Range Livestock Experiment Station): Custer Flat.
with E. J. Woolfolk, F. M. Benson, G. Thompson

U.S.A., Montana, Carbon County: Ca 9 mi ENE of Bridger.
Rocky red beds with Eriogonum brevicaule, Paronychia corolla. Phenology: flowering.

U.S.A., Montana, Custer County: Cedar Spring.
South slope; sandy clay loam. Phenology: flowering.

U.S.A., Montana, Carter County: 15 mi N of Alzada.
Grassland. Phenology: flowering.

U.S.A., Montana, Big Horn County: Slopes above Ok-A-Beh boat ramp.
T6S R30E S24
Seeps with acer negundo. Phenology: flowering.

U.S.A., Montana, Sheridan County: Sandhills Wilderness Area.
Sandy loam, north aspect; 2% slope; associated with Stipa comata and Agropyron dasytachyum. Phenology: flowering.
with Gloria R. B. Mooers

U.S.A., Montana, Big Horn County: Slopes above Ok-A-Beh Boat Ramp.
Seeps with Acer negundo. Phenology: flowering.

U.S.A., Montana: Custer National Forest: Cow Creek Divide.
Level slope; sandy loam; with stipas, andropogons. Phenology: flowering.

U.S.A., Montana: Custer National Forest: Long Pine District, E of R. S. pasture near road.
North slope; sandy loam. Phenology: flowering.

U.S.A., North Dakota, Ward County: Des Lacs National Wildlife Refuge: 1 1/2 mi NW of Kenmare.
East facing prairie slope. Phenology: flowering.
Neil Hotchkiss, s.n.. 7/6/1941.

U.S.A., North Dakota: Valley City.

U.S.A., North Dakota: Valley City.
Hill top. Phenology: flowering.

U.S.A., North Dakota, Rolette County: Dunseith.
Sandy hills; sandy loam soil. Phenology: flowering.

U.S.A., North Dakota: Maza.
High, dry prairie. Phenology: flowering.

U.S.A., North Dakota, Ramsey County: Webster.
Along roadside, in sandy loam soil. Phenology: flowering.

U.S.A., North Dakota, Nelson County: Tolna.
High sandy hill, roadsides. Phenology: vegetative only.

U.S.A., North Dakota: Kindred.
Prairie. Phenology: flowering.
Wilhelm G. Solheim, 181. 7/4/1929.

U.S.A., North Dakota:
Sandy hills. Phenology: flowering.

U.S.A., North Dakota: Dickerson.
Mrs. Belle Cook, s.n.. 6//1896.

U.S.A., North Dakota: Grand Forks.
Prairie. Phenology: vegetative only.

U.S.A., North Dakota, Sargent County: Tewaukon National Wildlife Refuge: north side of Pool 4: 5 mi S of Cayuga.
Prairie area. Phenology: flowering.

U.S.A., Montana, Phillips County: Malta.
Bottoms. Phenology: buds.
J. W. Blankinship, s.n.. 6/9/1901.

U.S.A., Montana, Dawson County: Glendive.
Breaks. Phenology: flowering.
2. Calylophus serrulatus (Nutt.) P.H. Raven

U.S.A., Montana, Phillips County: 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.
Silver sagebrush-grasslands on loamy soil on rolling hills with swales. Phenology: flowering & fruiting.

U.S.A., Montana, Valley County: Charles M. Russell National Wildlife Refuge: Cut Throat Coulee at terminus of Refuge Road 325, ca 4.5 air mi N of Bonetrail Boat Ramp, ca 44 air mi WSW of Fort Peck; ca 43 air mi SW of Glasgow.
Grasslands with scattered ponderosa pine and juniper on sandy soil. Phenology: flowering & 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.
Rocky and sandy south-facing slope with scattered grasses, ponderosa pine, and juniper. Phenology: flowering & fruiting.
Accession: (unaccessioned), Barcode: USFS0050233

U.S.A., South Dakota, Harding County: Custer National Forest: Slim Buttes: in and around draws SE of junction of North Divide or Forest Road 3125 and Forest Road 3145 in the vicinity of Camp Spring, ca 4.5 air mi S of Reva Gap, ca 19 air mi ESE of Buffalo.
Draw dominated by green ash and aspen. Phenology: flowering & fruiting.
Accession: (unaccessioned), Barcode: USFS0050601

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.
Near rock outcrop among grass and sagebrush-dominated grazing land. Phenology: flowering.

U.S.A., Wyoming, Crook County: Ca 1 mi S of Beulah.
44° 31.8' N, 104° 5' W; unknown, , GPS reading
Grassy slope, with Calochortus and Linum. Flowers yellow. Phenology: flowering.

U.S.A., Wyoming, Laramie County: Goshen Rim at U.S. Hwy 85 ca 7 mi SSW of Meriden.
Sandy bank, with Oenothera latifolia and Dalea villosa. Flowers yellow. Phenology: flowering.

U.S.A., Wyoming, Platte County: Camp Guernsey: in a drainage 120 m E of Emigrant Hill Road, ca 1.8 km SSE of Range Guard 1.
513520E, 4700948N; unknown, GPS reading
20 degree slopes; mixed grass prairie with occasional shrubs; silty loam with limestone cobbles; with Yucca glauca, Rhus trilobata, Eriogonum cernuum, E. effusum, Schizachyrium coparium, Bouteloua gracilis, Calamovilfa longifolia, Aristida purpurea var fendleriana. Scattered; ascending to erect, rhizomatous, perennial herb; 1.5dm tall; corolla yellow. Phenology: flowering.
1. Calylophus serrulatus (Nutt.) P.H. Raven.
Nancy E. Hastings, 9. 6/20/2012.

U.S.A., Wyoming, Platte County: Camp Guernsey: ca 0.9 km S of Register Cliff Monument and ca 2.5 km ESE of Rifle Range Abutment.
523400E, 4676000N; unknown, GPS reading
Gentle slopes to low cliffs; disturbed mixed grass prairie with limestone cliffs and ledges; gravelly loamy sand; with Yucca glauca, Rhus trilobata, Opuntia polyacantha, Bouteloua gracilis, Bromus tectorum. Scattered; ascending, woody caudex, perennial herb; to 20 cm tall. Phenology: flowering & fruiting.
Carlos A. Popolizio, 723. 6/13/1996.
with Nancy E. Hastings, Rosalie M. Smith, Donald L. Hazlett

U.S.A., Wyoming, Platte County: Camp Guernsey: 4.4 km NE of Sam Draw, 2.9 km S of Broom Creek.
zone DMC, 523300E, 4699400N; unknown, GPS reading
Rolling; meadow; sandy loam; along creek; with Koeleria cristata, Gaura, Bromus, Artemisia spp. Scattered; ascending, woody taprooted, perennial herb; 15-30 cm tall; serrulate leaves; woody stem at base; peltate stigma; corolla bright yellow. Phenology: flowering & fruiting.
1. Calylophus serrulatus (Nutt.) P.H. Raven.
Patricia P. Douglas, 325. 6/28/1995.
with Nancy E. Hastings, Rosalie M. Smith

U.S.A., Wyoming, Goshen County: Wyoming Game and Fish Department's Rawhide unit along the North Platte River, ca 3 air mi SE of Lingle; ca 7.3 air mi WNW of Torrington.
River bank. Phenology: flowering.
Steve Kilpatrick, RH165. 5/27/1982.

U.S.A., Wyoming, Goshen County: Wyoming Game and Fish Department Rawhide unit along the North Platte River, ca 3 air mi S of Lingle; ca 7 air mi WNW of Torrington.
Wooded area. Phenology: flowering.
Steve Kilpatrick, RH25. 5/27/1982.

U.S.A., Wyoming, Laramie County: Ca 22 mi E of U.S. Hwy 85 along Chalk Bluffs Road, S of Cheyenne.
Bluffs along dry creek bed near microwave tower; in sandy soil, open ground. Occasional. Phenology: flowering.

U.S.A., Wyoming, Albany County: Laramie Range: at Sherman Station on the Union Pacific Railroad.
41.0983° N, 105.3496° W; NAD 83, uncertainty 0.5 mi., Digital Map
Grassland, granitic hills. Common. Phenology: flowering.

U.S.A., Wyoming, Sheridan County: Hills E of Sheridan.
Sandy hillsides. Phenology: flowering.

U.S.A., Wyoming, Platte County: Between Fish Creek Road and Cottonwood Creek, 28 road mi NW of Wheatland.
Grassland and disturbed roadside. Phenology: flowering & fruiting.

U.S.A., Wyoming, Laramie County: Ca 10 mi NW of Midway, ca 7 mi N of U.S. Hwy 85.
Phenology: flowering & fruiting.
with J. Von Loh

U.S.A., Wyoming, Laramie County: Near Antelope Draw, ca 8 mi SW of Midway.
with J. Von Loh

U.S.A., Wyoming, Laramie County: F. E. Warren Air Force Base: north boundary.
Rock outcrop. Phenology: flowering & fruiting.
with J. Von Loh

U.S.A., Wyoming, Laramie County: Near P-1, ca 5 mi N of Midway.
Rocky area, rock outcrop. Phenology: flowering & fruiting.

U.S.A., Wyoming, Platte County: Badger.

U.S.A., Wyoming, Sheridan County: Eastern slope Big Horn Mountains: Little Rapid Creek, ca 6.5 air m S of Beckton.
South-facing slope of sparsely vegetated loose sandy red soil below red Chugwater Formation cliffs. Phenology: flowering.
with Janet Britt

U.S.A., Wyoming, Sheridan County: Between Sheridan and Buffalo.
Rolling plains. Phenology: flowering.

U.S.A., Wyoming, Johnson County: Buffalo.

U.S.A., Wyoming, Platte County: 10 mi S of Glendo on U.S. Hwy 87.

U.S.A., Wyoming, Platte County: Between Fish Creek Road and Cottonwood Creek, 28 road mi NW of Wheatland.
Grassland. Phenology: flowering.

U.S.A., Wyoming, Platte County: Between Fish Creek Road and Cottonwood Creek, 28 road mi NW of Wheatland.
Dry sand draw. Phenology: flowering.

Dry sand draw. Phenology: flowering.

U.S.A., Wyoming, Platte County: Along Kinney Creek, 32 road mi NW of Wheatland.
Creek banks, dry, usually wet early spring and summer. Phenology: flowering.

U.S.A., Wyoming, Platte County: Along Cottonwood Creek, 30 road mi NW of Wheatland.
Hay meadow, irrigated when water in creek. Phenology: flowering.

U.S.A., Wyoming, Platte County: Along Kinney Creek, 32 road mi NW of Wheatland.
Creek banks, dry, usually wet early spring and summer. Phenology: fruiting.

U.S.A., Wyoming, Platte County: Guernsey State Park: peninsula on northeast shore of Guernsey Reservoir, ca 2 1/4 air mi NW of Powell Mountain, ca 5 air mi NW of Guernsey.
Open limestone outcrops on south-facing bank of reservoir, with Salix, Glycyrrhiza. Phenology: flowering.

U.S.A., Wyoming, Campbell County:
Grassy hills with scattered pine. Phenology: flowering.
Mary Alice Sanguinetti, 190. 7/8/1978.
with Keith H. Dueholm

U.S.A., Wyoming, Campbell County: Along U.S. Hwy 14-16.
Grassy plains. Phenology: flowering.
Mary Alice Sanguinetti, 232. 7/9/1978.
with Keith H. Deuholm

U.S.A., Wyoming, Carbon County: Hanna Creek.
Dry stony ridge. Phenology: flowering.

U.S.A., Wyoming, Sheridan County: Upper Little Goose.
Gravelly hillsides. Phenology: flowering.

U.S.A., Wyoming, Converse County: Orin Junction.

U.S.A., Wyoming, Converse County: 6 mi E of Glenrock.
Roadsides. Phenology: flowering.

U.S.A., Wyoming, Albany County: Blue Grass Hills.

U.S.A., Wyoming, Sheridan County: Big Horn Mountains: Little Tongue River Canyon.
Dry rocky hillsides. Yellow flowers. Phenology: flowering.
with Rua P. Williams

U.S.A., Wyoming, Goshen County: Torrington.
42.0625° N, 104.1844° W; NAD 83, uncertainty 2 mi., Nat. Geog. TOPO!

U.S.A., Wyoming, Sheridan County: 4 mi SW of Dayton.
T56N R87W
Depressions in short-grass prairie. Abundant. Phenology: flowering.

U.S.A., Wyoming, Sheridan County: Little Goose Creek Road.
Sandy stony road. Phenology: flowering.

U.S.A., Wyoming, Platte County: Guernsey.
Loose soil on shelves of cliffs. Phenology: flowering.