Penstemon arenicola (1997)
PLANTAGINACEAE
Penstemon arenicola A. Nelson
U.S.A., Wyoming, Park County: Northern Absaroka Area: Shoshone National Forest: Northern Absaroka Wilderness: Dead Indian Creek Trail, ca 21 air mi NW of Cody.
Sagebrush slopes with scattered limber pine, juniper, and spruce/fir forest in moist areas. Phenology: fruiting.
Accession: USFS 857230, Barcode: USFS0038952

Penstemon arenicola (1997)
PLANTAGINACEAE
Penstemon arenicola A. Nelson
U.S.A., Wyoming, Park County: 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, & 20.
Pine and spruce forest with occasional meadows, rock outcrops, and ridges; substrate volcanic. Phenology: flowering.
with Cathy Binger
Accession: USFS 857231, Barcode: USFS0038953

Penstemon arenicola (2003)
PLANTAGINACEAE
Penstemon arenicola A. Nelson
U.S.A., Wyoming, Big Horn County: Bighorn Basin: along east side of Lane 42, 3.5 mi S of Burlington.
Elev. 4330 ft.
Saltbush-greasewood community with Atriplex gardneri, Musineon divaricatum, Xylorhiza glabriuscula, and Cymopterus acaulis. Phenology: flowering & fruiting.
Accession: RM 913236, Barcode: RM0066275

U.S.A., Wyoming, Park County: North Fork Shoshone River Drainage: Absaroka Mountains: ridge E of Pagoda Creek, ca 1.5-2.5 mi S of U.S. Hwy 14, 16, & 20.
Open, rocky areas with scattered Douglas fir and limber pine.
Accession: RM 724803, Barcode: RM0066893

U.S.A., Wyoming, Park County: Absaroka Mountains: North Fork Shoshone River Drainage: ridge between Lost and Canyon creeks, ca 2-4 mi S of U.S. Hwy 14, 16, & 20.
Open, rocky ridgetop with scattered Douglas fir and limber pine. Phenology: flowering & fruiting.
Accession: 731202, Barcode: RM0066890

U.S.A., Wyoming, Park County: Absaroka Mountains: North Fork Shoshone River Drainage: north-south trending ridge between Horse Creek and Grizzly Creek ca 2-5 mi N of U.S. Hwy 14, 16, & 20.
Rocky ridgetop, sagebrush-grassland/Douglas fir-limber pine mosaic. Phenology: flowering & fruiting.
Accession: RM 731426, Barcode: RM0066889

U.S.A., Wyoming, Park County: [location and coordinates withheld]
Summit and north facing slopes below in Douglas fir woodland and rocky openings. Phenology: flowering & fruiting.

U.S.A., Montana, Carbon County: [location and coordinates withheld]
Elev. 4500 ft.
Sagebrush-grassland with Artemisia pedatifida, Hymenoxys acaulis, Atriplex confertifolia, and Bouteloua gracilis. Phenology: flowering & fruiting.
Accession: RM 779862

U.S.A., Wyoming, Hot Springs County: Bighorn Basin: along east side of Murphy Draw Road, ca 3/4 mi N of Wyo Hwy 431.
Elev. 5200 ft.
Saltbush-grassland with Atriplex gardneri, Atriplex confertifolia, Musineon divaricatum, and Vicia americana. Phenology: buds.

U.S.A., Wyoming, Hot Springs County: Bighorn Basin: along east side of Murphy Draw Road, ca 2.5 mi N of Wyo Hwy 431.
Saltbush-grassland with Atriplex gardneri, Xylorhiza glabriuscula, Poa secunda, and Sisymbrium altissimum. Phenology: flowering.

U.S.A., Wyoming, Sweetwater County: [location and coordinates withheld]
Clay flat with low vegetation surrounded by sagebrush. Phenology: flowering.
Annotations:
1. Penstemon arenicola A. Nelson
Annotated by Laura Welp.
with Laura Welp
Accession: (unaccessioned)

U.S.A., Wyoming, Sweetwater County: Great Divide Basin Area: Great Divide Basin: along the Continental Divide N of Deadman Wash, ca 11.5 air mi NNW of Point of Rocks; ca 24 air mi NE of Rock Springs.
Sagebrush slopes and flats. Phenology: flowering.
Annotations:
1. Penstemon arenicola A. Nelson
Annotated by Laura Welp.
with Laura Welp
Accession: (unaccessioned)

U.S.A., Wyoming, Sweetwater County: [location and coordinates withheld]
Sagebrush slopes and flats. Phenology: flowering.
Annotations:
1. Penstemon arenicola A. Nelson
Annotated by Laura Welp.
with Laura Welp
Accession: (unaccessioned)

U.S.A., Wyoming, Sweetwater County: Great Divide Basin Area: Great Divide Basin: near Dugout Wash in Red Desert Basin, ca 25.5 air mi WNW of Wamsutter; ca 46 air mi ENE of Rock Springs.
Sandy clay flats above a small reservoir. Phenology: flowering & fruiting.

U.S.A., Wyoming, Sweetwater County: [location and coordinates withheld]
Partially vegetated sand dune and north facing slope with Festuca and scattered sagebrush. Phenology: flowering.

U.S.A., Wyoming, Sweetwater County: Great Divide Basin Area: Great Divide Basin: ca 2.5 air mi E of Luman Butte; ca 7 air mi W of Lost Creek Lake.
Rocky outcrops in low rolling plains. Phenology: flowering & fruiting.

U.S.A., Wyoming, Sweetwater County: Great Divide Basin Area: Great Divide Basin: Bastard Butte, ca 13.5 air mi W of Eagles Nest; ca 4.5 air mi SE of Five Fingers Butte.
East facing slope of butte with sagebrush and grasses. Phenology: flowering.

U.S.A., Wyoming, Carbon County: [location and coordinates withheld]
Partly vegetated southwest facing slope with low sagebrush; sandy soil with small sandstone outcrops. Phenology: flowering.

U.S.A., Wyoming, Carbon County: Great Divide Basin Area: Great Divide Basin: on the Continental Divide, ca 5 air mi E of Government Reservoir; ca 13 air mi SSW of Creston Junction.
Disturbed roadside at top of hill with graminoids, Alyssum, and sagebrush; sandy silt soil. Phenology: flowering.

U.S.A., Wyoming, Carbon County: Great Divide Basin Area: Great Divide Basin: ca 3 air mi ESE of Wamsutter; ca 11.5 air mi WSW of Creston Junction.
Slight slope and depressions in low rolling plains Phenology: flowering.

Disturbed area near pipeline; sandy silt soil. Phenology: flowering.

Shallow drainage on south facing slope with fine sandy soil. Phenology: flowering.

Dry hilltop with grasses and scattered Artemisia; rocky sandy soil. Phenology: flowering.

U.S.A., Wyoming, Sweetwater County: Great Divide Basin Area: Great Divide Basin: Alkali Basin, ca 18.5 air mi NE of Spring Butte; ca 15 air mi W of Red Lake.
Small depression on hilltop with Artemisia pedatifida; sand/clay soil. Phenology: flowering.

West facing slope of hill in low rolling plains with grasses and scattered low sagebrush; fine sandy soil. Phenology: flowering.

U.S.A., Wyoming, Sweetwater County: Great Divide Basin Area: Great Divide Basin: Alkali Basin, ca 14 air mi E of Freighter Spring; ca 12 air mi W of Luman Butte.
North facing slope with sagebrush and grasses; fine sandy soil. Phenology: flowering.

U.S.A., Wyoming, Sweetwater County: Great Divide Basin Area: Great Divide Basin: base of Steamboat Mountain, ca 14 air mi N of Superior; ca 5 air mi NW of Greasewood Reservoir.
Partially vegetated sandstone and mudstone slopes at base of mountain; silty, shallow soil with rocks. Phenology: flowering.

U.S.A., Wyoming, Sweetwater County: Rock Springs Uplift: Zerkel Mesa, ca 2 air mi NE of Superior.
Plains above and steep escarpment below Zerkel Mesa with sandstone outcrops, sagebrush - limber pine. Phenology: flowering.
with Keith H. Dueholm

U.S.A., Wyoming, Lincoln County: Southern Salt River Range and Vicinity: badlands area ca 1 air mi N of Round Mountain; ca 11 air mi NE of Kemmerer.
Partially barren slopes with shrubs in ravines, cushion plant communities, and redbeds. Phenology: flowering.
with Tom Cramer

U.S.A., Wyoming, Sweetwater County: Wetlands and Adjacent Areas: Pacific Creek, ca 14 air mi NE of Farson.
Sandy uplands. Phenology: flowering.
Accession: RM (unaccessioned)

U.S.A., Wyoming, Sweetwater County: Wetlands and Adjacent Areas: Pacific Creek, ca 17 air mi NE of Farson.
Sandy uplands. Phenology: flowering & fruiting.
Accession: RM (unaccessioned)

U.S.A., Wyoming, Sweetwater County: Wetlands and Adjacent Areas: Pacific Creek, ca 22 air mi NE of Farson.
Sandy uplands. Phenology: flowering & fruiting.
Accession: RM (unaccessioned)

U.S.A., Wyoming, Carbon County: In the Red Desert on the Lincoln Highway between Rawlins and Creston.
41.7874° N, 107.3998° W; NAD 83, uncertainty 5 mi., Digital Map
Flowers dark purple. Phenology: flowering.

U.S.A., Wyoming, Sublette County: Ca 35 mi S of Pinedale.
42.4398° N, 109.5564° W; NAD 83, uncertainty 2 mi., Digital Map
Sagebrush desert. Phenology: flowering & fruiting.

U.S.A., Wyoming, Sublette County: Upper Green River Basin: river access E of South Big Piney Road, ca 11 mi S and 0.5 mi E of Big Piney.
Gravel terrace dominated by Artemisia tridentata, with Castilleja angustifolia, Physaria integrifolia. Phenology: flowering.

U.S.A., Wyoming, Park County: North Fork Shoshone River Drainage: Absaroka Mountains: north-south trending ridge immediately E of June Creek, ca 1/4 mi S of North Fork Shoshone River.
Dry, open, rocky northwest facing slope in open Douglas fir forest with sparse groundlayer vegetation.

U.S.A., Wyoming, Park County: North Fork Shoshone River Drainage: Absaroka Mountains: ridge W of Elk Fork Creek, ca 2-3 mi S of U.S. Hwy 14, 16, & 20.
T52N R107W S25; also S36
Open, rocky, ridgetop with scattered Douglas fir and limber pine.

U.S.A., Wyoming, Park County: North Fork Shoshone River Drainage: Absaroka Mountains: ridge/divide between Moss Creek and Clearwater Creek, ca 1.5-2.5 mi N of U.S. Hwy 14, 16, & 20.
Open Douglas fir forest and dry, rocky openings.

U.S.A., Wyoming, Park County: North Fork Shoshone River Drainage: Absaroka Mountains: ridge between Sweetwater and Horse creeks, ca 1/4-1 mi N of the North Fork Shoshone River.
Open Douglas fir-limber pine parkland.

U.S.A., Wyoming, Park County: North Fork Shoshone River Drainage: Absaroka Mountains: ridgetop between Pagoda and Grace creeks, ca 2 mi S of U.S. Hwy 14, 16, & 20.
Rocky, open habitats with scattered Douglas fir and limber pine.

U.S.A., Wyoming, Sweetwater County: Ca 8 mi NE of Wamsutter.
Sandy-clay barren ridge with Arenaria hookeri, Eriogonum, and P. fremontii nearby. Phenology: flowering & fruiting.

U.S.A., Wyoming, Fremont County: Wind River Indian Reservation: Dry Creek.
Sandy soil above Gypsum layer with Lesquerella and Phlox. Phenology: flowering & fruiting.

U.S.A., Wyoming, Lincoln County: Ca 7 mi SW of Opal.
Elev. 2040 m.
Heavy clay soil, sagebrush-grass steppe community. Phenology: flowering.
with J. Kass

U.S.A., Wyoming, Sublette County: Cedar Creek Road, ca 2 mi W of Caipet.
Gravelley hill and slopes. Black sage community. Phenology: flowering & fruiting.
with J. Kass

U.S.A., Wyoming, Sublette County: Birch Creek Canyon, ca 8 mi N of LaBarge.
White shale knolls of the Wasatch Formation with blacksage and Wyoming sagebrush. Phenology: flowering & fruiting.

U.S.A., Wyoming, Fremont County: Wind River Basin: flats on north side of Cedar Ridge, ca 0.5 mi S of Badwater Road; ca 2.5 mi S of Copper Mountain.
Ashy-clay whitish flats and low hills, often with surface layer of chert or sandstone gravel; community of patches of Artemisia pedatifida, A. porteri, A. longifolia or Atriplex gardneri; vegetative cover 0-25%. Phenology: flowering.

U.S.A., Wyoming, Park County: Absaroka Range: east slope of divide between Horse Creek and Sweetwater Creek, ca 0.6 mi N of the North Fork Shoshone River and the Wapiti Campground, ca 0.8 mi N of U.S. Hwy 14, 16, & 20.
Semi-barren, loose, shifting, east-facing slopes of coarse-textured volcanic andesite with low cover of surface gravel; community of Artemisia tridentata and Elymus spicatus; vegetative cover 5-10%. Phenology: flowering & fruiting.

U.S.A., Wyoming, Park County: Bighorn Basin: west and southwest slopes of west cone of Heart Mountain, NE of Wyo Hwy 120; ca 9 air mi NNW of Cody.
Stabilized talus slopes of yellowish, white, or reddish limey sandstone with dolomite boulders and gravel; cushion plant/bunchgrass community of Shoshonea pulvinata, Minuartia nuttallii, Cymopterus longilobus, Leucopoa kingii, and Poa secunda. Phenology: flowering.

U.S.A., Wyoming, Sweetwater County: Green River Basin: sand dunes on east slope of Steamboat Rim, ca 1 mi S of Johnson Gap and 2 3/4 mi N of North Table Mountain.
Stabilized steep sand dune on midslope (25-40% slope) in community of Artemisia tridentata var. tridentata/Chrysothamnus viscidiflorus var. viscidiflorus/Elymus lanceolatus/Psoralidium lanceolatum. Vegetative cover 35-40%. Phenology: flowering & fruiting.

U.S.A., Wyoming, Park County: Southwestern Absarokas: ca 23 air mi SW of intersection of Wyo Hwy 291 and U.S. Hwy 14, 16, & 20 [near South Fork Shoshone River].
Mixed sage and grass.

U.S.A., Wyoming, Lincoln County: Southern Salt River Range and Vicinity: Wyo Hwy 233, ca 5 air mi NNW of Kemmerer.
Sandy slopes and cobble stone ridges. Phenology: flowering & fruiting.
with B. E. Nelson

U.S.A., Wyoming, Carbon County: 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.
Sagebrush-grassland. Phenology: flowering.
with Beth Ward

U.S.A., Wyoming, Sweetwater County: South-central Wyoming: Washakie Basin: mesa W of north end of Cooper Ridge, S of Cutthroat Draw, ca 1-2 air mi E of Wyo Hwy 430; ca 18 air mi SE of Rock Springs.
T17N R102W S16 N1/4; also South1/4 S9
Sandy, small rock soil in large areas between bare sandstone rock. Phenology: flowering & fruiting.

U.S.A., Wyoming, Sweetwater County: South-central Wyoming: Rock Springs Uplift: spring and creek S of and adjacent to sand dunes located ca 1-2 air mi SW of Steamboat Rim, ca 25.5 air mi NNE of Rock Springs.
T23N R103W S22 N1/2; also South1/4 S15
Sandy soil. Phenology: fruiting.

U.S.A., Wyoming, Carbon County: South-central Wyoming: ca 2-2.5 air mi E of Savery.
T12N R89W S9 South1/2
Sagebrush-juniper slopes, south exposure with sandy/rocky soil. Phenology: flowering.
with Beth Ward

U.S.A., Wyoming, Sweetwater County: South-Central Wyoming: Rock Springs Uplift: hills and draws sloping down to the W toward Killpecker Creek, ca 1 air mi E of Killpecker Creek; ca 3 air mi N of Rock Springs.
Sandy hills with rock and clay outcrops; greasewood and spiny hopsage. Phenology: flowering.

U.S.A., Wyoming, Sweetwater County: South-Central Wyoming: Rock Springs Uplift: west-facing draws and slopes to a tributary of Bitter Creek, ca 8.5 air mi NW of Table Rock; ca 10.5 air mi ESE of Point of Rocks.
Rocky, sandy outcrops with sagebrush or open. Phenology: flowering.

Badlands draw. Phenology: flowering.

U.S.A., Wyoming, Sublette County: Upper Green River Basin: Cretaceous Mountain/Hogsback Ridge area: south end of Big Mesa; ca 6.5 air mi NW of La Barge.
Sandstone outcrops and sandy slopes. Phenology: flowering.

U.S.A., Wyoming, Sublette County: Upper Green River Basin: Cretaceous Mountain/Hogsback Ridge area: 2 air mi NNW of Calpet.
Benches with sandstone outcrops and sandy slopes. Phenology: flowering.

U.S.A., Wyoming, Lincoln County: Upper Green River Basin: Cretaceous Mountain/Hogsback Ridge area: La Barge Creek Road, ca 3 air mi W of U.S. Hwy 189; 0.5-1 mi E to SE of Red Gap.
Sagebrush grasslands with sandstone benches. Phenology: flowering.

U.S.A., Wyoming, Sublette County: Upper Green River Basin: Cretaceous Mountain/Hogsback Ridge area: ca 9.5 air mi NNW of La Barge; just W of Wyo Hwy 235 and NW of Dry Piney Creek.
Sandstone outcrops, sandy ridge, and slopes with sagebrush. Phenology: flowering.

U.S.A., Wyoming, Sublette County: Upper Green River Basin: Cretaceous Mountain/Hogsback Ridge area: ca 1-1.5 air mi NNE of Calpet.
Sandstone caprock and outcrops and sandy slopes. Phenology: flowering.

U.S.A., Wyoming, Lincoln County: Upper Green River Basin: Muddy Creek, ca 6 air mi W of U.S. Hwy 189.
Sandstone outcrops and sandy slopes. Phenology: flowering.

U.S.A., Wyoming, Sublette County: Upper Green River Basin: Cretaceous Mountain/Hogsback Ridge area: northeast end of Cretaceous Mountain; ca 12 air mi ENE of U.S. Hwy 189 and Wyo Hwy 235 junction.
Sandstone outcrops and sandy slopes with big sagebrush on lower slopes, mountain mahogany on ridge and upper slopes, and some areas of sedge meadow on more calcareous substrate. Phenology: flowering.

U.S.A., Wyoming, Sublette County: Upper Green River Basin: Cretaceous Mountain/Hogsback Ridge area: ca 3.5 air mi NW of Cretaceous Mountain.
Sandstone and limestone outcrops and derived substrates. Phenology: flowering.

U.S.A., Wyoming, Sublette County: Upper Green River Basin: Cretaceous Mountain/Hogsback Ridge area: ca 9.5 air mi NNW of La Barge.
Sandstone outcrops and sandy slopes with some limestone. Phenology: flowering.

U.S.A., Wyoming, Sublette County: Upper Green River Basin: Cretaceous Mountain/Hogsback Ridge area: Yose Canyon road, ca 0.5 mi W of U.S. Hwy 189; ca 10 air mi NNE of La Barge.
Limestone outcrops and sandy slopes. Phenology: flowering.

U.S.A., Wyoming, Sublette County: Upper Green River Basin: Cretaceous Mountain/Hogsback Ridge area: Clara Birds Nipple (Bird Nipple), ca 6 air mi N of La Barge.
Sandstone caprock and sandy areas with sagebrush below, mountain mahogany and currant above. Phenology: flowering.

U.S.A., Wyoming, Sublette County: Upper Green River Basin: Cretaceous Mountain/Hogsback Ridge area: ca 9.5 air mi W of junction U.S. Hwy 189 and Wyo Hwy 235.
Sandstone outcrops and sandy areas. Phenology: flowering.

U.S.A., Wyoming, Sublette County: Upper Green River Basin: Cretaceous Mountain/Hogsback Ridge area: ca 10.5 air mi W of junction U.S. Hwy 189 and Wyo Hwy 235.
Sandstone caprock and sandy slopes. Phenology: flowering.

U.S.A., Wyoming, Sublette County: Upper Green River Basin: Cretaceous Mountain/Hogsback Ridge area: ca 11 air mi W of junction U.S. Hwy 189 and Wyo Hwy 235.
Sandstone caprock and sandy slopes. Phenology: flowering.

U.S.A., Wyoming, Hot Springs County: Southeastern Absarokas: Castle Rocks and vicinity in North Fork Owl Creek drainage, ca 43 air mi WNW of Thermopolis.
Clay slopes with scattered sagebrush.

U.S.A., Wyoming, Washakie County: Bighorn Basin: Middle Fork Fifteenmile Creek near end of Paradise Alley, ca 24.5 air mi WNW of Worland.
Sandy clay slopes and flats.
with Erik Nelson

U.S.A., Wyoming, Big Horn County: Bighorn Basin: along and above St. Joe Canal off Dorsey Creek Road, ca 18 air mi W of Basin, ca 5 air mi SSE of Burlington.
Elev. 4400
Sandy clay flats between canal slopes.
with Erik Nelson

U.S.A., Wyoming, Park County: Bighorn Basin: along Whistle Creek Road at Gilmore Hill, ca 7.5 air mi ESE of McCullough Peak, ca 15.5 air mi SSE of Powell.
Sandy or sandy clay slopes among sandstone outcrops between uplands and badlands.
with Erik Nelson

U.S.A., Wyoming, Park County: Bighorn Basin: between Big Sand Coulee and Polecat Bench, 9.5 air mi WNW of Powell, ca 6 air mi NW of Ralston.
Clay flats in rough breaks.

U.S.A., Wyoming, Sweetwater County: Great Divide Basin: 8 road mi E of Point of Rocks on I-80, ca 30 air mi ENE of Rock Springs.
On roadside. Common. Phenology: flowering.
with Ronald L. Hartman

U.S.A., Wyoming, Park County: Bighorn Basin: Squaw Teats, ca 15 air mi ESE of Meeteetse.
Sagebrush-grassland.

U.S.A., Wyoming, Big Horn County: Bighorn Basin: Potato Ridge, ca 14 air mi ESE of Greybull.
Shaly sagebrush-saltsage slopes.

U.S.A., Wyoming, Hot Springs County: 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.
Clay and sandy clay ridgetop in rough breaks.

U.S.A., Wyoming, Natrona County: Ca 6 air mi N of Arminto.
Blackish, loose soil, with little growing in it. Phenology: flowering & fruiting.

U.S.A., Wyoming, Fremont County: Wind River Basin: edge of Moneta Hills (badlands), ca 3 3/4 air mi NNE of Moneta.
Badland slopes. Phenology: flowering & fruiting.

U.S.A., Wyoming, Fremont County: Wind River Basin: edge of Moneta Hills (badlands), ca 3 3/4 air mi NNE of Moneta.
Level area at top of badland slopes. Phenology: flowering & fruiting.

U.S.A., Wyoming, Fremont County: Chalk Hills Draw: ca 10 air mi SE of Moneta on Castle Gardens Road.
Sagebrush grassland and badland slopes and bottoms. Phenology: flowering & fruiting.

U.S.A., Wyoming, Sweetwater County: Wamsutter Arch: Deadman Wash, ca 2.5 air mi E of Point of Rocks.
Greasewood flats surrounding wash, sandy silt slopes and uplands with sagebrush; flats. Phenology: flowering.
with Ronald L. Hartman

U.S.A., Wyoming, Hot Springs County: Bighorn Basin: ca 18 air mi E of Thermopolis.
Sandstone uplift with outcrops, rocky and sandy slopes, sagebrush grassland on bench above, loose shale slopes; shale slopes.
with Ronald L. Hartman

U.S.A., Wyoming, Sweetwater County: Washakie Basin: ca 6 air mi W of Tipton.
Gently rolling sagebrush plain on clay and soil, clay flats; plain. Phenology: flowering & fruiting.

U.S.A., Wyoming, Hot Springs County: Absaroka Mountains: ca 39 mi WNW of Thermopolis, east side of The Holy City and near Squaw Teat Butte, along Meadow Creek.
Steep, clayey talus slopes. Phenology: flowering & fruiting.
Robert S. Kirkpatrick, 137. 6/23/1983.
with B. E. Nelson

U.S.A., Wyoming, Hot Springs County: Absaroka Mountains: ca 21 air mi SSW of Meeteetse, in the vicinity of the headwaters of West Grass Creek.
Sagebrush grasslands with scattered Pinus flexilis; dry areas.
Robert S. Kirkpatrick, 3307. 7/1/1984.

U.S.A., Wyoming, Park County: Absaroka Mountains: ca 33 air mi SW of Cody, at the junction of Boulder Creek and Little Boulder Creek.
Sage grasslands with scattered limber pine.
Robert S. Kirkpatrick, 618. 7/1/1983.

U.S.A., Wyoming, Washakie County: Big Horn Mountains: Rome Hill Road: ca 13.5 air mi ESE of Ten Sleep.
Sagebruch slopes, Pseudotsuga woodland, and sandstone and limestone cap rock with Pinus ponderosa; cap rock. Phenology: flowering.
with Keith H. Dueholm

U.S.A., Wyoming, Park County: Bighorn Basin: Pappapau Buttes.
Sandstone and limestone outcrops and slopes.
with Keith H. Dueholm

U.S.A., Wyoming, Sweetwater County: ca 2 air mi NE of Superior.
Plains above and steep escarpment below Zerkel Mesa with sandstone outcrops, sagebrush - limber pine. Phenology: flowering.

U.S.A., Wyoming, Washakie County: Bighorn Basin: ca 6 mi W of Ten Sleep.
44.0286° N, 107.5629° W; NAD 83, uncertainty 2 mi., Nat. Geog. TOPO!
Sandy slopes with sandstone outcrop.

U.S.A., Wyoming, Washakie County: Bighorn Basin: along Wyo Hwy 431, ca 23 air mi W of Worland.
Badlands with shales, sandstones, and plains on margin.

U.S.A., Wyoming, Fremont County: Wind River Basin: Cedar Ridge and barren hills to the N.
Barren hills. Phenology: flowering & fruiting.

U.S.A., Wyoming, Park County: Bighorn Basin: east base of Elk Butte: ca 14 air mi SE of Cody.
Sandstone outcrops with some shale in drainage.
with John Hamann

U.S.A., Wyoming, Park County: Absaroka Mountains: confluence of Jack Creek and Greybull River.
Rolling grassy slopes with scattered limber pine and some douglas fir.
with Robert S. and Ruth E. B. Kirkpatrick

U.S.A., Wyoming, Park County: Absaroka Mountains: Boulder Basin Trail, Hunter Creek, and vicinity.
Rolling grassy hills with scattered limber pine.
with Robert S. and Ruth E. B. Kirkpatrick

U.S.A., Wyoming, Hot Springs County: Absaroka Mountains: Grass Creek Road, ca 10 road mi W of junction with Little Grass Creek.
Sagebrush grassland and limber pine woodland.
with Robert S. Kirkpatrick

U.S.A., Wyoming, Fremont County: Wind River Basin: ca 18 air mi S of Moneta.
Sandy ridge with sandstone outcrops and sagebrush covered slopes. Phenology: flowering & fruiting.
with June Haines

U.S.A., Wyoming, Fremont County: Wind River Basin: Cottonwood Creek, 7 air mi NE of Lysite.
Sandy ridge, sandstone outcrops, eroded slopes and creek bottoms. Phenology: flowering & fruiting.
with June Haines

U.S.A., Wyoming, Fremont County: Wind River Basin: Wyoming Canal, ca 15.5 air mi WNW of Shoshoni.
Eroded sandy and shaley slopes and drainage. Phenology: flowering & fruiting.
with June Haines

U.S.A., Wyoming, Sublette County: Green River Basin: along U.S. Hwy 191 ca 2-3 air mi S of East Fork River, ca 17 air mi SE of Pinedale.
Sagebrush steppe. Phenology: flowering.
with Tom Cramer

U.S.A., Wyoming, Sweetwater County: Ca 8 mi NE of Wamsutter.
Sandy-clay barren ridge with Arenaria hookeri, Eriogonum, and P. fremontii nearby.

U.S.A., Wyoming, Natrona County: Southern Powder River Basin/Southeastern Plains: Southern Powder River Basin: ca 1.5 mi E of Arminto.
Sandy slopes. Phenology: fruiting.
with T. W. Nelson

U.S.A., Wyoming, Sublette County: Green River Basin: Stewart Point, ca 4 air mi SW of Pinedale.
Sagebrush slopes, dry stream channels, eroded, often barren slopes, windswept ridge and ravines with assorted shrubs. Phenology: flowering.
with Tom Cramer

U.S.A., Wyoming, Sweetwater County: Green River Basin: area along Big Sandy River from gaging station, ca 1 air mi to the east; ca 10 air mi SW of Farson.
Disturbed and bottom areas along river, slopes with sagebrush and rabbitbrush. Phenology: flowering.
with Tom Cramer and Charmaine Refsdal

U.S.A., Wyoming, Lincoln County: Green River Basin: ca 5 air mi SSE of La Barge along the Green River.
Bottom land along river. Phenology: flowering.
with Tom Cramer and Charmaine Refsdal

U.S.A., Wyoming, Sublette County: Green River Basin: hill just SW of Onion Springs, ca 7 air mi SW of Daniel Junction.
Sagebrush hills, open ridgetops, and Prunus/Amelanchier spots. Phenology: fruiting.

U.S.A., Wyoming, Sublette County: Green River Basin: New Fork River, ca 4.5 air mi S of Boulder.
Riverside meadows and cottonwood/willows with adjacent sagebrush. Phenology: fruiting.
with Jane T. Kellett

U.S.A., Wyoming, Sublette County: Green River Basin: Grindstone Butte, ca 3 air mi SE of Daniel.
Sagebrush hill and windswept, open ridgetops. Phenology: fruiting.
with Jane T. Kellett

U.S.A., Wyoming, Sublette County: Green River Basin: east side of Aspen Ridge, ca 10 air mi W of Daniel.
Sagebrush hills, grassy draws, windswept hilltops, and aspen copses. Phenology: flowering.

U.S.A., Wyoming, Sublette County: Green River Basin: cliff on south side of New Fork River, just above confluence with Green River, ca 8 air mi E of Big Piney.
Sandy cliffside with limber pine. Phenology: flowering & fruiting.

U.S.A., Wyoming, Sublette County: Green River Basin: north end of West Buckhorn Draw, ca 17 air mi E of La Barge.
Sagebrush slopes, draws, and tops. Phenology: fruiting.

U.S.A., Wyoming, Sublette County: Green River Basin: lower part of Chapel Canyon, ca 11 air mi NE of La Barge.
Sage flats and sandstone outcrops. Phenology: flowering & fruiting.

U.S.A., Wyoming, Lincoln County: Green River Basin: ca 7.5 air mi W of Fontenelle.
Clay and shale slopes and flats; sparse vegetation; Atriplex. Phenology: flowering.

U.S.A., Wyoming, Lincoln County: Green River Basin: ca 10 air mi N of Opal on the north side of U.S. Hwy 189.
Eroded clay and shale hillsides. Phenology: flowering.

U.S.A., Wyoming, Sweetwater County: Green River Basin: ca 9 air mi N of Farson on the west side of U.S. Hwy 191.
Clay flats and slopes with intermittent sagebrush mounds. Phenology: flowering.

U.S.A., Wyoming, Sweetwater County: Green River Basin: ca 6.8 air mi ENE of Farson on the north side of Wyo Hwy 28.
Windswept shale and clay hilltop. Phenology: flowering.

U.S.A., Wyoming, Sublette County: [location and coordinates withheld]
Eroded clay slopes. Phenology: flowering.

U.S.A., Wyoming, Sublette County: Green River Basin: Red Hill, ca 7 air mi SSE of Big Piney.
Sand hills with scattered sagebrush and Atriplex. Phenology: flowering.

U.S.A., Wyoming, Sweetwater County: Green River Basin: ca 18 air mi W of Farson in a side branch of Eighteen Mile Canyon.
Open sandy hillsides. Phenology: flowering.

U.S.A., Wyoming, Sublette County: Green River Basin: west end of Ross Ridge, ca 1.5 air mi E of New Fork and Green rivers confluence.
Sandy draw sides. Phenology: flowering.

U.S.A., Wyoming, Sublette County: Green River Basin: Little Colorado Desert: The Frog, ca 5.5 air mi NE of La Barge.
Sand around sandstone outcrop with sparse sagebrush, Atriplex, Juniperus, Pinus, and Rhus. Phenology: flowering.

U.S.A., Wyoming, Sublette County: Green River Basin: ridge S of and above Cottonwood Creek, ca 16.5 air mi N of Big Piney along County Road 117.
Steep clay slopes; nearly bare. Phenology: flowering.

U.S.A., Wyoming, Sweetwater County: Green River Basin: Big Sandy River, ca 4.5 air mi SW of Farson.
Rolling sagebrush. Phenology: flowering.

U.S.A., Wyoming, Sweetwater County: Green River Basin: Eighteenmile Canyon, ca 20.5 air mi W of Farson.
Rocky hilltop with scattered sagebrush. Phenology: flowering.

U.S.A., Wyoming, Sublette County: Green River Basin: Mount Airy, ca 4 air mi WSW of Pinedale.
Steep clay gully hillsides. Phenology: flowering.

U.S.A., Wyoming, Sublette County: Green River Basin: ca 12.5 air mi SW of Big Piney.
Steep clay eroded hillside. Phenology: flowering.

U.S.A., Wyoming, Sublette County: Green River Basin: Long Draw, ca 20 air mi N of Farson.
Gravel hilltop edges above draw with scattered sagebrush and Atriplex. Phenology: flowering.
with Jane T. Kellett

U.S.A., Wyoming, Sweetwater County: Green River Basin: ca 17 air mi NW of Farson.
Sagebrush and Atriplex hillsides and tops. Phenology: flowering & fruiting.

U.S.A., Wyoming, Sublette County: Green River Basin: Sugar Loaf, ca 26.5 air mi NW of Farson.
Gravel open hilltop with scattered sagebrush. Phenology: flowering.

U.S.A., Wyoming, Sublette County: Green River Basin: ca 4 air mi WNW of Boulder.
Sandy bluffside with Amelanchier and scattered Pinus flexilis. Phenology: flowering & fruiting.

U.S.A., Wyoming, Sublette County: Green River Basin: ca 1.5 air mi E of Marbleton.
Steep sandy hillside with Rhus and Purshia. Phenology: flowering & fruiting.

U.S.A., Wyoming, Lincoln County: Green River Basin: ca 15.5 air mi SSW of La Barge.
Sandy sagebrush draw down from hill. Phenology: flowering.

U.S.A., Wyoming, Lincoln County: Green River Basin: Slate Creek Butte, ca 5 air mi SW of Fontenelle Dam.
Clay badlands hillside. Phenology: flowering.

U.S.A., Wyoming, Sublette County: Green River Basin: Boulder Creek, ca 3.5 air mi N of Boulder.
Creekside and sagebrush slopes. Phenology: fruiting.

U.S.A., Wyoming, Sublette County: Green River Basin: ca 18 air mi N of Farson.
Sagebrush hill. Phenology: fruiting.

U.S.A., Wyoming, Sweetwater County: Ca 2 mi S of Hay Reservoir.
Sandy bank with Rumex and Artemisia. Flower blue; approaching P nitidus. Phenology: flowering.

U.S.A., Wyoming, Park County: Absaroka Mountains: North Fork Shoshone River Drainage: Shoshone National Forest: on northeast ridge of Clayton Mountain, ca 3 mi S of U.S. Hwy 14, 16, & 20, ca 33 mi W of Cody.
Barren areas in loose soil with Cymopterus terebinthinus, Eriogonum flavum, Phlox multiflora, and Townsendia condensata var. anomala. Phenology: flowering.

U.S.A., Wyoming, Park County: Absaroka Mountains: North Fork Shoshone River Drainage: ca 3 mi N of Wyo Hwy 14, along Elk Fork Creek Trail.
Growing with Townsendia condensata, Penstemon arenicola, and Carex filifolia. Phenology: flowering.

U.S.A., Wyoming, Park County: Absaroka Mountains: North Fork Shoshone River Drainage: along Sweetwater Creek Road, ca 2 mi N of U.S. Hwy 14, 16, and 20.
In open scree area with Cymopterus terebinthinus. Phenology: flowering.

U.S.A., Wyoming, Park County: Absaroka Mountains: Shoshone National Forest: along U.S. Hwy 14, 16, and 20 just S of Elk Fork Campground.
44.4633° N, 109.629° W; NAD 83, uncertainty 0.5 mi., Nat. Geog. TOPO!
Phenology: flowering.

U.S.A., Wyoming, Fremont County: North of Kemmerer.
41.7924° N, 110.5377° W; NAD 83, uncertainty 2 mi., Digital Map
Blue flowers. Phenology: flowering.
with Rua Pierson (Williams)

U.S.A., Wyoming, Uinta County: Basins and Mountains of Southwest Wyoming: ca 4 air mi N of I-80 on both sides of Wyo Hwy 412.
Clay soils on semi-barren slopes. Phenology: flowering & fruiting.
with Duane Atwood

U.S.A., Montana, Madison County: Upper Ruby River Valley: ca 0.1 air mi N of junction of Sweetwater Road and Country Road 248, ca 3 air mi S of Ruby River Reservoir, ca 13 air mi SW of Virginia City.
Roadcut. Phenology: flowering.

U.S.A., Wyoming, Uinta County: Basins and Mountains of Southwest Wyoming: ca 10 air mi N of I-80 on east side of Wyo Hwy 412.
Clay soils. Phenology: flowering.
with Duane Atwood

U.S.A., Wyoming, Sweetwater County: 50 ft S of Lincoln-Sweetwater Road, 2.5 mi W of U.S. Hwy 191.
Elev. 2020 m.
Sagebrush flat. Phenology: flowering.

U.S.A., Wyoming, Sweetwater County: Red Desert in Great Divide Basin: along Tipton North or County Road 67, ca 1 mi W of Horseshoe Bend, ca 23.8 air mi NW of Wamsutter.
Wasatch formation, main body claystone and siltstone, calcareous sandstone, shale, oil shale, coal; shallow sandy clay soil; slope >5 deg, aspect north; basin, with Lomatium foeniculaceum, Atriplex gardneri, Phlox hoodii, Chrysothamnus, Achnatherum hymenoides, Poa secunda, Astragalus sp. Phenology: flowering.
Annotated by Bonnie Heidel.
with Kyle Donahue

U.S.A., Wyoming, Lincoln County: [location and coordinates withheld]
Rolling semi-barren desert hills, ridgetop, alternating sandy and clay soils, gravelly. Phenology: flowering & fruiting.

U.S.A., Wyoming, Lincoln County: [location and coordinates withheld]
Loose sandy soils, sagebrush bottoms. Phenology: flowering & fruiting.

Rolling semi-barren sagebrush slopes. Phenology: flowering & fruiting.

U.S.A., Wyoming, Big Horn County: Horse Haven Exclosure.
Nuttall's saltbush. Phenology: flowering & fruiting.
Annotated by Ken Macy in 1968.

U.S.A., Wyoming, Fremont County: Wind River Indian Reservation.
43.4882° N, 108.8955° W; NAD 83, uncertainty 2 mi., Nat. Geog. TOPO!
Rocky slope with Artemisia and Opuntia. Corolla blue. Phenology: flowering & fruiting.

U.S.A., Wyoming, Sweetwater County: 6.5 mi N of Wamsutter on the Jeffrey City Road.
Antelope - Sheep Food Habits Study. Phenology: flowering.
Annotated by Frank S. Crosswhite in 1969.

U.S.A., Wyoming, Sweetwater County: Red Desert area, ca 25 mi from Bairoil on road to Wamsutter.
Dry, sandy roadside. Phenology: flowering.
Annotated by Frank S. Crosswhite in 1969.

U.S.A., Wyoming, Uinta County: Carter.
41.4375° N, 110.4294° W; NAD 83, uncertainty 0.5 mi., Digital Map
Phenology: flowering & fruiting.
Annotated by Frank S. Crosswhite in 1969.
Leslie N. Goodding, s.n.. 6/24/1902.

U.S.A., Wyoming, Sweetwater County: 7-10 mi SW of Wamsutter, (nearer Red Desert).
Sandy mesa. Phenology: fruiting.

U.S.A., Wyoming, Sweetwater County: In a valley 15 mi N of Point of Rocks.
Phenology: flowering & fruiting.
with E. N. Wilcox

U.S.A., Wyoming, Sublette County: Near Daniel.
Phenology: flowering & fruiting.

U.S.A., Wyoming, Sweetwater County: W of Reliance.
Phenology: flowering.

U.S.A., Wyoming, Sweetwater County: Great Divide Basin: Tenmile Draw area at Jim Bridger Mine, ca 10 air mi NE of Point of Rocks; ca 33 air ENE of Rock Springs.
T21N R99W S28
In shallow sandy rocky wash. Occasional. Phenology: flowering & fruiting.
David Krementz, 9. 6/14/1978.

U.S.A., Wyoming, Uinta County: Henrys Fork.
41.0532° N, 110.0972° W; NAD 83, uncertainty 0.5 mi., Digital Map
Phenology: fruiting.
Leslie N. Goodding, s.n.. 6/26/1902.

Penstemon cf. arenicola (1983)
Penstemon cf. arenicola A. Nelson
U.S.A., Wyoming, Carbon County: S of Lamont; 26 mi N of Rawlins.
Dry ground near salt flat in sandy soil. Phenology: flowering & fruiting.

U.S.A., Wyoming, Sweetwater County: Red Desert: Table Rock.
Sagebrush swales. Phenology: fruiting.

U.S.A., Wyoming, Sweetwater County: 10 mi E of Rock Springs.
In dry, clayey soil in shadscale desert. Common; flowers sky-blue. Phenology: flowering.
with Marjorie W. Porter

U.S.A., Wyoming, Carbon County: Great Divide Basin: Mahoney Lakes area, ca 17 air mi NW of Rawlins.
Scattered on sandy hills by lakes with Stipa comata, Oryzopsis hymenoides, and Artemisia tridentata. Flowers purple (pink). Phenology: flowering & fruiting.
Annotated by Robert D. Dorn in 1987.

U.S.A., Wyoming, Washakie County: West Flank Big Horn Mountains: southwest rim of Trapper Canyon, ca 2 air mi SE of Bush Butte; ca 16 air mi N of Hyattville.
On sparsely vegetated sandy soil among small calcareous sandstone outcrops in sagebrush grassland. Phenology: flowering.

U.S.A., Wyoming, Sublette County: Washakie National Forest: Newfork Lake Area.
Phenology: flowering.

U.S.A., Wyoming, Sweetwater County: Steamboat Mountain.
Sandy plains and in the dunes. Phenology: flowering & fruiting.

U.S.A., Wyoming, Sweetwater County: Ca 30 mi N of Point of Rocks, near Steamboat Mountain.
Common; flowers blue. Phenology: fruiting.
with Marjorie W. Porter

U.S.A., Wyoming, Hot Springs County: Cochran Exclosure.
Sagebrush-grass. Phenology: flowering & fruiting.
Annotated by Ken Macy in 1968.

U.S.A., Wyoming, Fremont County: Near Riverton.

U.S.A., Wyoming, Lincoln County: Ca 5.4 mi W of U.S. Hwy 189, on La Barge Creek Road, N of road.
Clay knoll in sagebrush-Atriplex community. Phenology: flowering & fruiting.

U.S.A., Wyoming, no county County: Along highway from Fort Bridger to Rawlins.
Abundant. Phenology: flowering.
with Ruth A. Nelson

U.S.A., Wyoming, Sweetwater County: W of Red Desert.
Sandy bare soil. Phenology: fruiting.

U.S.A., Wyoming, Sweetwater County: 5 mi SE of Eden.
Dry sandy plain. Flowers blue. Phenology: flowering & fruiting.
with Rua Williams

U.S.A., Wyoming, Sweetwater County: Red Desert.
Harry Hapeman, s.n.. 6/13/1920.

U.S.A., Wyoming, Johnson County:
Gentle east-facing slope; sandy soil; badlands with saltsage and daisy. Scarce. Phenology: flowering.
Annotated by B. E. Nelson on 4//1984.
Accession: USFS 403235, Barcode: USFS0069864

U.S.A., Wyoming, Carbon County: Near Rawlins.
Plains. Blue flowers. Phenology: flowering.

U.S.A., Wyoming, Hot Springs County: Ca 10 mi SW of Thermopolis along Wyo Hwy 120.
On sandstone outcropping. Phenology: flowering.

U.S.A., Wyoming, Lincoln County: Between Opal and Granger.
Dry flats. Phenology: flowering & fruiting.
with George M. Armstrong

U.S.A., Wyoming, Sublette County: Hwy 187, 24.1 km (15 mi) SE of Pinedale.
In sandy sagebrush country. Locally common: corolla lobes subequal and spreading, the lobes blue, the tube violet with red-violet lines inside, the palate white bearded; staminode dilated distally, golden-yellow bearded. Phenology: flowering.
with Patricia K. Holmgren

U.S.A., Wyoming, Park County: Yellowstone Forest Reserve.
Grover Davis, s.n.. 6//1907.

U.S.A., Wyoming, Sweetwater County: Near Rock Springs.
Sandy flat. Flowers bluish-purple. Phenology: flowering.

U.S.A., Wyoming, Sweetwater County: Continental Divide, near Table Rock on I-80.
In sandy clay with sage, rabbitbrush. Common; flowers deep blue. Phenology: flowering.

U.S.A., Wyoming, Lincoln County: Ca 5.6 mi N of Kemmerer (junction U.S. hwys 30 & 189) on Wyo Hwy 233.
T22N R116W S22; also S27
Southwest-facing bank of white clay, associated with Gilia congesta, Phacelia hastata. Flowers lavender-blue. Phenology: flowering.
Annotated by Noel H. Holmgren.
with John S. Shultz

U.S.A., Wyoming, Sublette County: Green River Basin: Yellow Point Ridge area, ca 31.5 air mi S of Pinedale.
Wyoming big sagebrush-Nuttall saltbush grassland on sandy flats; soil fine-textured with limestone-shale gravel. Phenology: fruiting.

U.S.A., Wyoming, Lincoln County: Ca 3 mi W of Fontinelle Reseroir, U.S. Hwy 189.
T24N R112W S19; also S20 and S29
Sagebrush community, in gravel. Phenology: flowering.
with Kaye H. Thorne

U.S.A., Wyoming, Uinta County: 10 mi E of Lyman.
Sagebrush and grassland, clayey soil. Flowers blue. Phenology: flowering.
with Marjorie W. Porter

U.S.A., Wyoming, Sweetwater County: 20 mi E of Point of Rocks.
Very dry, sandy soil. Phenology: fruiting.
with Lois B. Payson

U.S.A., Wyoming, Sweetwater County: Table Rock on I-80.
T19N R97W S7 South1/2
Clay bank with Chrysothamnus, Erysimum. Phenology: flowering.

U.S.A., Wyoming, Carbon County: Near Rawlins.
Plains. Flowers blue. Phenology: flowering.

U.S.A., Wyoming, Uinta County: Fort Bridger.
Annotated by F. W. P. in 1916.

U.S.A., Wyoming, Uinta County: Fort Bridger.
Annotated by Francis W. Pennell in 1916.

U.S.A., Wyoming, Sweetwater County: Great Divide Basin: 8 road mi E of Point of Rocks on I-80, ca 30 air mi ENE of Rock Springs.
On roadside. Common. Phenology: flowering.
Annotated by Ronald L. Hartman.

U.S.A., Wyoming, Sweetwater County: Great Divide Basin: ca 2 mi S of Table Rock Butte, ca 28 air mi WSW of Wamsutter.
On sandy clay slopes with junipers. Frequent. Phenology: flowering.
1. Penstemon arenicola A. Nelson.

U.S.A., Wyoming, Sweetwater County: Point of Rocks. [County not given on label.]
Type Specimen: Holotype for Penstemon arenicola A. Nelson. Bull. Torrey Bot. Club 25: 280. 1898.
. Type.