Petrophyton caespitosum (2004)
ROSACEAE
Petrophyton caespitosum (Nutt.) Rydb.
U.S.A., Arizona, Coconino County: Coconino National Forest: above and in upper Walnut Canyon from County Road 3 (Forest Hwy 3) to the junction with Skunk Canyon, ca 4.5 - 5 air mi SE of Flagstaff.
Slopes of small side canyon. Phenology: flowering & fruiting.
with James F. Fowler
Accession: RM (unaccessioned)

Petrophyton caespitosum (2005)
ROSACEAE
Petrophyton caespitosum (Nutt.) Rydb.
U.S.A., Wyoming, Lincoln County: Salt River Range: Bridger-Teton National Forest: northeast ridge of Stewart Peak, ca 10 mi SSE of Alpine.
Crevices in limestone cliffs. Phenology: flowering & fruiting.
Accession: RM 912957, Barcode: RM0068436

Petrophyton caespitosum (1986)
ROSACEAE
Petrophyton caespitosum (Nutt.) Rydb.
U.S.A., Wyoming, Big Horn County: Bighorn Basin: northeast side of Sheep Mountain, ca 11 mi N of Greybull.
Limestone cliff crevices and ledges. Phenology: buds.
Accession: RM 725503, Barcode: RM0257073

U.S.A., Montana, Carbon County: Pryor Mountains: ca 2 mi W of Sage Creek Campground, ca 20 mi ESE of Bridger.
Elev. 6000 ft.
Limestone cliffs and pavement with scattered Pinus flexilis.
Accession: RM (unaccessioned)

U.S.A., Montana, Gallatin County: Madison Range: Gallatin National Forest: along the north side of Taylor Creek: ca 1 mi W of U.S. Hwy 191, ca 14 mi S of Big Sky.
Open, south-facing limestone cliffs and slope with Agropyron spicatum, Artemisia fridgida, and Pentaphylloides floribunda. Phenology: flowering & fruiting.
Accession: RM 754536

U.S.A., Montana, Madison County: Henrys Lake Mountains: Gallatin National Forest: along Sheep Creek just N of the first footbridge; ca 1.5 mi S of the Madison River.
Elev. 6800 ft.
Rock outcroppings with Telesonix heucheriformis, Petrophytum caespitosum, and Heuchera parvifolia. Phenology: vegetative only.
Accession: RM 780486

U.S.A., Montana, Gallatin County: Gallatin Range foothills: Gallatin National Forest: Elkhorn Creek Canyon, ca 1/2-1 mi E of Montana Highway 191, 40 mi N of West Yellowstone.
On limestone boulders with Telesonix heucheriformis. Phenology: vegetative only.
Accession: RM 787426

U.S.A., Wyoming, Teton County: Teton Range: Grand Teton National Park: Rendezvous Mountain: 1/3 mi W of ski-tram terminus.
Limestone cliffs and ledges with Telesonix heucheriformis. Phenology: vegetative only.
with Yolanda Evert
Accession: RM 788557, Barcode: RM0257090

U.S.A., Wyoming, Fremont County: Bridger Mountains: along Birdseye Road in canyon 13 mi NE of Shoshoni.
Elev. 6100 ft.
Limestone cliff crevices with Petrophytum caespitosum. Phenology: flowering & fruiting.

U.S.A., Arizona, Navajo County: Sitgreaves National Forest: Mogollon Plateau: Wildcat Canyon above Forest Road 504, ca 10.5 air mi NW of Heber; ca 25.5 air mi S of Winslow.
Canyon bottom, walls, and slopes on limestone. Phenology: flowering & fruiting.
with James F. Fowler, Brian Reif
Accession: RM (unaccessioned)

U.S.A., Arizona, Navajo County: Sitgreaves National Forest: Black Canyon along Forest Road 86, ca 3 air mi SW of Heber.
Limestone outcrop with sandy soil below. Phenology: flowering.
Annotations:
1. Petrophyton caespitosum (Nutt.) Rydb.
Annotated by B. E. Nelson.

U.S.A., Utah, Kane County: Glen Canyon National Recreation Area: Fence Hanging Garden, Fence Canyon.
Elev. 1213 m.
zone 12, 506611E, 4139277N; Specimen Label
Hanging garden.
with Jon Hak and C. Keleher
Accession: (unaccessioned)

U.S.A., Utah, San Juan County: Natural Bridges National Monument: Petro II Hanging Garden, White Canyon.
Elev. 1823 m.
zone 12, 586144E, 4161665N; Specimen Label
Hanging garden.
with C. L. May
Accession: (unaccessioned)

U.S.A., Utah, Uintah County: Dinosaur National Monument: Ely Hanging Garden, first north Canyon off Lower Ely Creek.
Elev. 1700 m.
zone 12, 663789E, 4491263N; Specimen Label
Hanging garden.
with C. L. May
Accession: (unaccessioned)

U.S.A., Colorado, Moffat County: Dinosaur National Monument: Ponderosa Hanging Garden, Yampa Canyon.
with C. L. May

U.S.A., Colorado, Moffat County: Dinosaur National Monument: Yampa Hanging Garden, Yampa Canyon.

U.S.A., Colorado, Moffat County: Dinosaur National Monument: Rimrock Hanging Garden, Blind Canyon.

U.S.A., Colorado, Moffat County: Dinosaur National Monument: Marbles Hanging Garden, Blind Canyon.

U.S.A., Colorado, Moffat County: Dinosaur National Monument: Redrock Hanging Garden, Redrock Canyon.

U.S.A., Utah, San Juan County: Glen Canyon National Recreation Area: Crossbed Hanging Garden in unnamed small canyon ca 1 km W of Alcove Canyon.
with C. L. May and Jon Hak

U.S.A., Utah, Washington County: Zion National Park: Canyon Overlook I Hanging Garden.
with C. L. May and Jon Hak

U.S.A., Utah, Washington County: Zion National Park: Canyon Overlook II Hanging Garden.
with C. L. May and Jon Hak

U.S.A., Utah, Washington County: Zion National Park: Hailstone Hanging Garden, Zion Canyon.

U.S.A., Utah, Washington County: Zion National Park: Grotto Hanging Garden, Zion Canyon.

U.S.A., Utah, San Juan County: Glen Canyon National Recreation Area: upper Three Garden, near junction of San Juan and Colorado River canyons.

U.S.A., Wyoming, Teton County: Gros Ventre Area: Granite Creek Hot Springs, N along trail and creek ca 1 air mile.
Coniferous forests, meadows, and streamside. Phenology: flowering.

U.S.A., Wyoming, Teton County: Gros Ventre Area: northeast lower slope of Darwin Peak.
Coniferous forest and streamside. Phenology: flowering.
with Tom Cramer

U.S.A., Wyoming, Teton County: Gros Ventre Area: ridge immediately N of Blue Miner Lake down to lake.
Calcareous slope and rock rubble. Phenology: flowering & fruiting.

U.S.A., Wyoming, Teton County: Gros Ventre Area: lower slopes of Sheep Mountain, ca 2.5-3.5 air mi from summit.
Grassy slopes and wooded areas. Phenology: buds.

U.S.A., Wyoming, Lincoln County: Southern Salt River Range and Vicinity: ca 13.5 air mi N of Cokeville; Sublette Range at Raymond Creek.
Granite outcrop. Phenology: fruiting.
with Jane T. Kellett

U.S.A., Wyoming, Big Horn County: Big Horn Mountains: along Cold Springs Road, ca 8 air mi NE of Hyattville and ca 32 air mi NE of Worland.
Juniper and Pinus with sagebrush on sandy soil with rocks. Phenology: flowering.

U.S.A., Wyoming, Washakie County: Big Horn Mountains: along Wyo Hwy 435, ca 10 air mi ENE of Ten Sleep.
Juniper, pine, and sagebrush on sandy soil with cobbles. Phenology: flowering.

U.S.A., Wyoming, Teton County: Teton Range East Slope: Rendezvous Mountain, just below ridge between Granite Canyon and Jackson Hole, ca 3/4 mi W of Apres Vous Peak, ca 1.5 air mi NW of Teton Village; ca 8 air mi NW of Jackson.
Rocky slopes and ledges dominated by forbs and graminoids.

U.S.A., Wyoming, Fremont County: East Slope Wind River Range and Vicinity: southeast side of Fairfield Hill, ca 6 air mi SW of Lander.
Juniper woodland/sagebrush grassland on steep slopes beneath limestone cliffbands. Phenology: flowering & fruiting.
Accession: USFS 849074, Barcode: USFS0033729

U.S.A., Wyoming, Fremont County: East Slope Wind River Range and Vicinity: Weed Draw to Canyon Creek, ca 12 air mi S of Lander.
Limestone boulder. Phenology: flowering.
Accession: USFS 849113, Barcode: USFS0033682

U.S.A., Wyoming, Fremont County: East Slope Wind River Range and Vicinity: south ridge of Sheep Canyon, ca 4.5 air mi SW of Lander.
Rocky mixed shrubland and grassland on limestone. Phenology: flowering.
Accession: USFS 849075, Barcode: USFS0033730

U.S.A., Wyoming, Hot Springs County: Wind River Canyon.
43.5071° N, 108.1691° W; NAD 83, uncertainty 5 mi., Digital Map
On the rock cliffs. Phenology: fruiting.

U.S.A., Wyoming, Washakie County: Southern Bighorn Mountains: Tensleep Canyon.
44.1158° N, 107.2533° W; NAD 83, uncertainty 2 mi., Digital Map
Limestone rocks. Phenology: buds.

U.S.A., Wyoming, Fremont County: Wind River Range: Warm Springs Creek.
43.5643° N, 109.8602° W; NAD 83, uncertainty 1 mi., Digital Map
Common on walls of limestone rock canyon. Phenology: flowering.

U.S.A., Wyoming, Sheridan County: Big Horn Mountains: Little Goose Canyon.
Dry, rough, rocky cliffs. Phenology: flowering.

U.S.A., Wyoming, Uinta County: Afton.
Cliffs in canyon. Phenology: flowering & fruiting.

U.S.A., Wyoming: Bighorn Basin.
Phenology: flowering.

U.S.A., Wyoming, Big Horn County: Big Horn National Forest: Shell Canyon, across canyon from small creek between Spurry Creek and Cedar Creek.
Douglas fir slope above highway, on shaded damp limestone outcrops; also seen on vertical limestone cliffs above. Phenology: flowering.

U.S.A., Wyoming, Teton County: Rendezvous Mountain, top of the aerial tram from Teton Village, NW of Jackson.
Transition between subalpine and alpine zones. Phenology: flowering.

U.S.A., Wyoming, Teton County: Teton National Forest: about the forks of Phillips Canyon.
25 degree south slope; rock soil; face of granite or ledge; with Lichen and moss; on cliffs-ledges, etc. Aundantly patchy, 4-6 inches tall. Phenology: vegetative only.
Charles H. McDonald, 907. 7/25/1929.

U.S.A., Wyoming: Big Horn Mountains.
Phenology: vegetative only.
Carrie Hapeman, s.n.. 9//1892.

U.S.A., Wyoming, Lincoln County: Wyoming National Forest: Swift Creek Mineral Springs.
30% south slope; rocky sandy loam soil; waste (rocks) with Heuchera, wheatgrass; rocky ledges. Abundance patchy, 4 inches tall. Phenology: flowering & fruiting.
Charles H. McDonald, McD&G-3. 8/22/1926.
with A. Gardiner

U.S.A., Wyoming, Big Horn County: Cold Springs Road NE of Hyattville, south side of Medicine Lodge Canyon.
On outcrops of limestone badrock in big sagebrush kentucky bluegrass vegetation. Abundant. Phenology: flowering.

U.S.A., Wyoming, Sheridan County: Big Horn National Forest: Walker Prairie.
17 degree SW slope; limestone soil; park, on rocks only with moss; on rocks in parks. Numerous, 2 inches tall. Phenology: flowering.

U.S.A., Wyoming, Sublette County: Gros Ventre Mountains: 15 mi NE of Bondurant.
Limestone cliffs near timberline. Phenology: flowering.
with Lois B. Payson

U.S.A., Wyoming, Sublette County: In the Vicinity of Green River Lakes. [*South facing shore on Lower Green River Lake.]
43.2824° N, 109.8253° W; NAD 83, uncertainty 0.5 mi., Digital Map
On limestone rocks. Phenology: flowering.
with Lois B. Payson

U.S.A., Wyoming, Teton County: Gros Ventre: along Swift Creek, ca 2 mi SW of Corner Peak.
In cliff crevices and on limestone boulders. Phenology: flowering.

U.S.A., Wyoming, Johnson County: Big Horn Mountains: above and along South Fork Piney Creek, ca 2 mi SW of Story.
On limestone cliffs. Phenology: flowering.

U.S.A., Wyoming, Teton County: Teton Range: Eddington Canyon, ca 0.5-1 mi S of Treasure Mountain Scout Camp.
On shaded limestone boulders in Douglas fir forest. Phenology: flowering.

U.S.A., Wyoming, Lincoln County: Along the Snake River; ca 2 mi E of Alpine Junction on U.S. Hwy 89 and 26.
On limestone rocks. label reads T37N R119W S14-not a Wyo location Phenology: flowering & fruiting.

U.S.A., Wyoming, Johnson County: Eastern Slope Big Horn Mountains: headwaters of Clear Creek and Crazy Woman River.
Phenology: flowering.

U.S.A., Wyoming, Big Horn County: Bighorn National Forest: Tongue River Canyon.
South slope; taken from rock soil; open woodland on rocks. Fairly abundant. Phenology: fruiting.

U.S.A., Wyoming, Fremont County: SE of Thermopolis and E of the Wind River Canyon; north flank of the Owl Creek Range: ridgetop NW of Birdseye Pass.
Transitional from sagebrush to conifer. Phenology: vegetative only.

U.S.A., Wyoming, Hot Springs County: SE of Thermopolis and E of the Wind River Canyon, on the north flank of the Owl Creek Range; ca 9 mi S of Thermopolis.
Steep hillside conifer area. Phenology: buds.

U.S.A., Wyoming, Fremont County: SW of Thermopolis and W of the Wind River Canyon, on the north flank of the Owl Creek, Arrowhead Ridge.
Three-tip sagebrush grassland. Phenology: flowering.

U.S.A., Wyoming, Sheridan County: Ca 20 air mi W of Sheridan, ridge S of North Fork Little Tongue River.
Decomposed granite with scattered limestone outcrops. Phenology: vegetative only.

U.S.A., Wyoming, Lincoln County: Salt River Range: Dry Creek, ridges above Quaking Aspen Hollow.
Large sheets of limestone ridges, associated with Telesonix jamesii, Heuchera, Ribes, and Leucopoa. Phenology: vegetative only.

U.S.A., Wyoming, Sublette County: Wyoming Range: East face of Mount McDougal Peak (sic).
Rock ledges, limestone, east facing. Phenology: buds.
with John S. Shultz and Kirsten Shultz.

U.S.A., Wyoming, Teton County: Targhee National Forest: Teton Canyon: Near Medicine Falls Trail, 0.5 mi S of Treasure Mountain Scout Camp.
Locally common in shalow soil pockets of limestone rocks. Phenology: flowering.

U.S.A., Wyoming, Teton County: Targhee National Forest: Teton Canyon: Near Medicine Falls Trail, 0.5 mi S of Treasure Mountain Scout Camp.
Locally common in shallow soil pockets of limestone rocks. Phenology: flowering.

U.S.A., Wyoming, Sublette County: Wind River Mountains: Green River Lakes.
Rocky slopes. Phenology: flowering & fruiting.

U.S.A., Wyoming, Lincoln County: Bridger National Forest: Swift Creek Canyon, E of Afton, 500 yd below Periodic Spring.
On limestone cliff. Phenology: flowering.

U.S.A., Wyoming, Big Horn County: Bighorn National Forest: Paintrock District: near Ruble Creek Exclosure.
On limestone boulder, growing on north and south exposure, with Artemisia tridentata, Festuca idahoensis, Stipa columbiana. Phenology: flowering.

U.S.A., Wyoming, Natrona County:
On limestone rocks with Arenaria obtusiloba and Draba.

U.S.A., Wyoming, Natrona County:
On limestone rocks with Arenaria obtusiloba and Draba. Matted. Phenology: buds.

U.S.A., Wyoming, Big Horn County: 4 mi SE of Hyattville.
Growing with Physaria australis and Erigeron ochroleucus. Frequently forming large mats. Phenology: fruiting.

U.S.A., Wyoming, Washakie County: Confluence of Leigh and Ten Sleep creeks.
Frequent on limestone cliffs, associated with Erigeron and Pellaea. Phenology: flowering & fruiting.

U.S.A., Wyoming, Teton County: Gros Peak.
Growing with Cystopteris fragilis and Selaginella densa; frequent on rocky talus. Phenology: buds.

U.S.A., Wyoming, Teton County: Tepee Creek.
Dry rocky ledges. Phenology: flowering & fruiting.

U.S.A., Wyoming, Sheridan County: Goose Creek Canyon, Sheridan. [*Big Goose Creek]
In precipetous rocky crevices. Phenology: flowering & fruiting.

U.S.A., Wyoming, Sublette County: West Slope Wind River Range: east flank of Big Sheep Mountain, ca 1 mi W of Lower Green River Lake, ca 29 air mi N of Pinedale.
Limestone outcrop in open canopy east-facing slope above sagebrush meadow. Phenology: flowering.

U.S.A., Wyoming, Washakie County: Foothills of west slope Big Horn Mountains: Cooks Vee on west side of Cooks Road (TNC Ten Sleep Preserve).
Sparsely vegetated limestone outcrop surrounded by sagebrush grassland and juniper. Phenology: flowering.
with Ann Humphrey

U.S.A., Wyoming, Big Horn County: Bighorn National Forest: Shell Ranger Station.
Gentle SW slope; on rocks; woodland; only on rocks. Very abundant. Phenology: flowering & fruiting.

U.S.A., Arizona, Coconino County: Trail to Supai Village; canyon wall.
T33N R4W S26
Phenology: flowering.
Annotations:
1. Petrophyton caespitosum (Nutt.) Rydb.
Annotated by Robert H. Peebles.
Accession: RMRS (unaccessioned)

U.S.A., Arizona, Coconino County: Sitgreaves National Forest; rim above Chevelon Creek.
T14N R14E S9
Phenology: flowering & fruiting.
Accession: RMRS (unaccessioned)

U.S.A., Wyoming, Teton County: Grand Teton National Park and Vicinity: Teton Range: in upper Granite Canyon, ca 11.5 air mi WSW of Moose; ca 12 air mi NW of Jackson.
Subalpine limestone cliffs and talus on steep northeast-facing slope. Phenology: flowering.
Annotations:
1. Petrophyton caespitosum (Nutt.) Rydb.
Annotated by David Scott.

U.S.A., Wyoming, Teton County: Bridger-Teton National Forest: Teton Range: Rendezvous Mountain, start of trail to Marion Lake in North Fork Granite Canyon.
Alpine. Phenology: flowering.
Annotated by David Scott.
with David Scott

U.S.A., South Dakota, Lawrence County: Lower Iron Creek Canyon.
T5N R2E S30
In crevices of limestone cliffs. Frequent. Phenology: buds.

U.S.A., South Dakota, Lawrence County: Black Hills: Black Hills National Forest: Boxelder Creek in vicinity of Nemo, ca 16.5 air mi ESE of Lead, SD, along Centennial Trail (#89) on top of rimrock above (east of) Forest Road 26. /2
T3N R5E S15 SE1/4
In small crevices in limestone.
with Paul Bosworth

U.S.A., South Dakota, Lawrence County: Black Hills: Black Hills National Forest: Boxelder Creek in vicinity of Nemo, ca 16.5 air mi ESE of Lead, SD, along Centennial Trail (#89) on top of rimrock above (east of) Forest Road 26. /2
In small crevices in limestone. Phenology: flowering.
with Paul Bosworth

U.S.A., South Dakota, Lawrence County: Deadwood.
T5N R3E S23
In crevices of limestone cliffs. Specimen was improperly pressed; plant is 3.5cm thick on the herbarium sheet. Phenology: vegetative only.
with Leroy Peiler

U.S.A., South Dakota, Lawrence County: Little Spearfish Trailhead just above Timon Campground.
T4S R1E S3 South1/2
Upland pine wooded slopes bordering narrow stream meadow, the steep slopes crowned by shear limestone cliffs, rare on tops of cliffs in most exposed (and difficult to get to) sites. Phenology: vegetative only.
with Craig Freeman

U.S.A., South Dakota, Lawrence County: Iron Creek Canyon, ca 0.5 mi SW of Spearfish Creek Road.
Moist crevice in limestone wall. Phenology: vegetative only.

U.S.A., Colorado, Garfield County: Glenwood Springs.
On limestone rocks. Phenology: flowering & fruiting.

U.S.A., Colorado, Gunnison County: Crystal Canyon, 10 mi N of Gothic, on cliff about 4 mi past Schofield Pass.
Cliff. Phenology: vegetative only.

U.S.A., Colorado, Garfield County: Glenwood Springs.
Growing on face of cliffs facing north. Phenology: vegetative only.

U.S.A., Colorado, Garfield County: Glenwood Springs.

George E. Osterhout, No #. 8/21/1918.

U.S.A., Colorado, Garfield County: Flat Tops/White River Plateau: Deep Creek Overlook, ca 12 air mi NE of Glenwood Springs.
T4SR87WS20
Top edge of north-facing cliffs and talus slopes above canyon, patches of Pinus flexilis and Pseudotsuga menziesii and un-forested rock. Phenology: flowering & fruiting.
James P. Vanderhorst, 1312. 7/23/1990.

U.S.A., Colorado, Rio Blanco County: Flat Tops/White River Plateau: Flat Tops Wilderness: Park Creek, ca 22 air mi N of Glenwood Springs.
T2SR89WS19; also S20, S21 and S22
Limestone cliffs. Phenology: flowering & fruiting.
James P. Vanderhorst, 1674. 8/12/1990.

U.S.A., Colorado, Garfield County: Flat Tops/White River Plateau: East Elk Creek drainage, ca 12 air mi NW of Glenwood Springs.
T4SR90WS31
At base of limestone cliffs with oak. Phenology: flowering & fruiting.
James P. Vanderhorst, 1958. 8/25/1990.

U.S.A., Colorado, Garfield County: Flat Tops/White River Plateau: north rim of Deep Creek Canyon around Balixburg Springs, ca 14 air mi NE of Glenwood Springs.
T4SR87WS7
Limestone rim rock with limber pine Douglas-fir and Selaginella. Phenology: fruiting.

U.S.A., Colorado, Garfield County: Flat Tops/White River Plateau: Flat Tops Wilderness: Blair Mountain, ca 17 air mi NNW of Glenwood Springs.
On rock. Phenology: flowering & fruiting.
with Carlos Palaci

U.S.A., Colorado, Gunnison County: Copper Creek Valley, ca 1.5 miles from Gothic.
South facing slope; limestone biotherm, Gothic formation. In crevices on walls of limestone cliff with Holodiscus dumosus, Arctostaphylos uva-ursi, Erigeron pinnatisectus and Chrysopis villosa. Phenology: flowering & fruiting.
Annotated by C. L. Porter in 1959.

U.S.A., Idaho, Clark County: Targhee National Forest: Beaverhead Range: above and W of Heart Canyon, ca 26 air mi NW of Dubois.
Open ridgetop, mostly grasses, some scattered Artemisia.

U.S.A., Idaho, Clark County: Targhee National Forest and vicinity: Beaverhead Range: above and E of Deadman Canyon, ca 28 air mi W of Dubois.
On limestone outcrop.

U.S.A., Idaho, Lemhi County: Targhee National Forest: Beaverhead Range: Eidelman Canyon, ca 2 air mi SE of Nicholia.
Ridgetop above canyon and upper slope.

U.S.A., Idaho, Clark County: Targhee National Forest: Beaverhead Range: above and E of Reno Gulch, ca 27 air mi SW of Dubois.
T9N R32E S18; also S19
Ridgetop with mostly grasses and forbs, scattered Pinus flexilis and Pseudotsuga menziesii.

U.S.A., Idaho, Clark County: Targhee National Forest: Western Centennial Mountains: ridge leading to Red Conglomerate Peaks, ca 28 air mi NW of Dubois.
Open rocky slopes, dominated by forbs, scattered Pinus flexilis and Pseudotsuga menziesii.

U.S.A., Arizona, Coconino County: Sitgreaves National Forest; rim above Chevelon Creek.
Dry limestone plateau; in cracks on limestone bedrock; pinion-juniper type; with Artemisia nova and Cowania mexicana. Phenology: flowering & fruiting.

U.S.A., Arizona, Coconino County: Flagstaff.
Phenology: flowering & fruiting.

U.S.A., Arizona, Cochise County: Huachuca Mountains: Carr Peak.
Under limestone cliffs or clinging to their faces in dry places. Phenology: flowering & fruiting.

U.S.A., New Mexico, Soccorro County: Lincoln National Forest: on ridge near Shelton Canyon Ranch road.
South G. slope; thin limestone soil; with catclaw and Triodia. Phenology: flowering & fruiting.
Robert D. Morris, M&K-2. 9/1/1932.
with W. G. Koogler
Accession: USFS 467047

U.S.A., Arizona, Coconino County: Coconino National Forest.
Phenology: flowering & fruiting.
Annotated by W. A. D. & I. Tm..
Accession: USFS 467049

U.S.A., New Mexico, Dona Ana County: Jornada Range Reserve: 1/2 miles from top of San Andreas.
45 degree west slope; rocky to loamy soil; browse. Phenology: vegetative only.
Annotated by Ell in 1939.
with R. H. Canfield
Accession: USFS 467054

U.S.A., Arizona, Coconino County: Coconino National Forest: about 1 mile Northwest of Marshall Lake.
Brownish clay loam soil. Phenology: flowering & fruiting.

U.S.A., New Mexico, Otero/Eddy County: Alamo National Forest: ridge 1 mi S of McCollaum's Ranch.
25 degree west slope; shallow loam on limestone rocks; grass-brush. Phenology: flowering.
William R. Chapline Jr., 487. 10/3/1915.

U.S.A., Colorado, Garfield County: Flat Tops/White River Plateau: Deep Creek Overlook, ca 12 air mi NE of Glenwood Springs.
Top edge of north-facing cliffs and talus slopes above canyon, patches of Pinus flexilis and Pseudotsuga menziesii, and unforested rock.
Accession: 686081

U.S.A., Colorado, Rio Blanco County: Flat Tops/White River Plateau: Flat Tops Wilderness: Park Creek, ca 22 air mi N of Glenwood Springs.
Limestone cliffs.
Accession: 686080

U.S.A., Colorado, Garfield County: Flat Tops/White River Plateau: East Elk Creek drainage, ca 12 air mi NW of Glenwood Springs.
At base of limestone cliffs, with oak.
Accession: 686079

U.S.A., Colorado, Garfield County: Flat Tops/White River Plateau: north rim of Deep Creek Canyon around Balixburg Spring, ca 14 air mi NE of Glenwood Springs.
Limestone rimrock, with limber pine, Douglas fir, and Selaginella.

U.S.A., Colorado, Garfield County: Flat Tops/White River Plateau: Flat Tops Wilderness: Blair Mountain, ca 17 air mi NNW of Glenwood Springs.
On rock.
with Carlos Palaci

U.S.A., Wyoming, Lincoln County: Wyoming/Salt River Ranges: Wyoming Range: Grayback Ridge ca 2.5 air mi NW of Pickle Pass, ca 17.5 air mi ESE of Alpine Junction, ca 30 air mi NE of Afton.
Limestone cliffs.

U.S.A., Wyoming, Teton County: Wyoming/Salt River Ranges: Wyoming Range: Buck Creek to Beaver Mountain.
Limestone ridge with some Douglas fir.

U.S.A., Wyoming, Lincoln County: Wyoming/Salt River Ranges: Wyoming Range: Deadman Mountain trail, 1-2 miles from trailhead; ca 0.1-0.7 air mi N of Deadman Mountain summit.
Calcareous scree slopes to E on ridge extending S to summit. Phenology: flowering.

U.S.A., Wyoming, Lincoln County: Wyoming/Salt River Ranges: Salt River Range: ridge 1-2 air mi SW of summit of Man Peak; ca 9 air mi E of Thayne.
Limestone ridge with patches of limber pine and subalpine fir. Phenology: flowering & fruiting.

U.S.A., Wyoming, Lincoln County: Wyoming/Salt River Ranges: Salt River Range: Star Peaks, on drainage W of peak 9988 (feet).
Limestone outcrops and loose remnants with islands of grass-herb patches and coniferous forests. Phenology: flowering.

U.S.A., Wyoming, Sublette County: Wyoming/Salt River Ranges: Wyoming Range: trail to Long Hollow but then straight N up spine of Mount Schidler; ca 2.5 air mi NE of Middle Piney Lake.
Coniferous forests and scree slopes. Phenology: flowering & fruiting.

U.S.A., Wyoming, Lincoln County: Upper Green River Basin: Cretaceous Mountain/Hogsback Ridge area: Hogsback Ridge: lower slopes on southeast end of Hogsback Ridge, ca 5.7 air mi W of La Barge; ca 35.5 air mi NNE of Kemmerer.
Limestone cliffs and pavement. Phenology: flowering & fruiting.
with Russ Nelson

U.S.A., Wyoming, Lincoln County: Upper Green River Basin: Cretaceous Mountain/Hogsback Ridge Area: southeastern corner of Hogsback Ridge, ca 22 air mi SW of Big Piney.
Limey, gravelly slopes and calcareous outcrops. Phenology: flowering.

U.S.A., Wyoming, Johnson County: Big Horn Mountains: ca 18.5 air mi WSW of Kaycee, ca 5 mi W of Barnum on Wyo Hwy 190-Barnum Road then on Barnum Mountain Road.
On limestone outcrops. Phenology: fruiting.

U.S.A., Wyoming, Sheridan County: Big Horn Mountains: in Wolf Creek Canyon above Wolf Post Office (Eaton Ranch), ca 8 air mi S of Dayton, ca 15.5 air mi W of Sheridan.
On limestone cliffs in canyon. Phenology: buds.

U.S.A., Wyoming, Big Horn County: Big Horn Mountains: rimrock above Trout Creek, ca 34 air mi ESE of Greybull, ca 13 air mi NE of Hyattville, S of Paint Rock Lakes.
Limestone cliffs. Phenology: flowering.

U.S.A., Wyoming, Fremont County: Big Horn Mountains: along Cottonwood Creek on the Lost Cabin-Nowood Road, ca 10.5 air mi N of Lost Cabin, ca 49.5 air mi NE of Riverton.
On and around sandstone outcrops. Phenology: flowering & fruiting.

U.S.A., Wyoming, Big Horn County: Big Horn Mountains: Salt Creek just off U.S. Hwy 14, ca 13 air mi ENE of Shell; ca 27.5 air mi ENE of Greybull.
Rock outcrops on sagebrush slope. Phenology: buds.

U.S.A., Wyoming, Big Horn County: Big Horn Mountains: on the rim of White Creek Canyon, ca 7.5 air mi E of Shell, ca 21 air mi ENE of Greybull.
Canyon rim. Phenology: buds.

U.S.A., Wyoming, Johnson County: Big Horn Mountains: in the canyon along the North Fork Crazy Woman Creek, ca 13.5 air mi SW of Buffalo.
Calcareous cliffs and ledges. Phenology: flowering.

U.S.A., Wyoming, Fremont County: Absaroka Mountains: ca 11 air mi NE of Dubois, 1.5 mi E of Game and Fish Elk Winter Headquarters.
Sagebrush grasslands (Artemisia tridentata var. wyomingensis) with scattered Pinus flexilis, limestone with occasional cliffs; limestone talus. Phenology: flowering & fruiting.
Robert S. Kirkpatrick, 2750. 6/21/1984.

U.S.A., Wyoming, Sheridan County: Big Horn Mountains; Bighorn National Forest: Freeze Out Point.
Limestone outcrops and slopes below. Phenology: buds.

U.S.A., Wyoming, Washakie County: Big Horn Mountains: ca 17 air mi SSW of Big Trails.
Limestone outcrop on west exposure. Phenology: flowering.

U.S.A., Wyoming, Big Horn County: Big Horn Mountains: Medicine Lodge Canyon.
Lower canyon slopes and floor. Phenology: flowering & fruiting.
with Keith H. Dueholm

U.S.A., Wyoming, Lincoln County: Salt River Range: headwaters of Corral Creek, ca 7 mi W of Corral Creek Guard Station.
Rocky slope with scattered Pinus albicaulis. Phenology: flowering.
with Leila and John Shultz

U.S.A., Wyoming, Sublette County: West Slope Wind River Range: Northwest slope of White Rock Mountain, ca 0.25 mi E of east shore of Upper Green River Lake, ca 28 air mi N of Pinedale.
Open canopy limestone outcrops on west-facing slope. Phenology: flowering.

U.S.A., Wyoming, Sublette County: West Slope Wind River Range: Base of western face of White Rock Mountain, adjacent to Highline Trail and east shore of Upper Green River Lake, ca 28 air mi N of Pinedale.
Limestone/shale talus slope. Phenology: flowering.

U.S.A., Wyoming, Natrona County:
On limestone rocks with Arenaria obtusiloba and Draba. Phenology: buds.

U.S.A., Wyoming, Hot Springs County: Absaroka Mountains: Owl Creek, ca 1/2 mi S of Middle Fork, 40 mi WNW of Thermopolis.
Ridge, limestone outcroppings with Carex rupestris, Haplopappus acaulis and scattered Pinus flexilis. Phenology: fruiting.

U.S.A., Montana, Carbon County: Pryor Mountains: Pryor Mountain National Wild Horse Range: on Sykes Ridge or BLM Road 1019 at the state line, ca 37 air mi SE of Bridger.
45.0145° N, 108.2925° W; uncertainty 0.5 mi., GPS reading
Mountain mahogany shrubland with scattered juniper on sandstone-limestone pavement with sandy areas. Phenology: vegetative only.
Annotated by B. E. Nelson.

U.S.A., Montana, Carbon County: Pryor Mountains: Bear Canyon and vicinity, ca 25 air mi SE of Bridger.
45.088° N, 108.522° W; uncertainty 1 mi., GPS reading
Limestone ledges, shelves, and cliffs. Phenology: vegetative only.
Annotated by B. E. Nelson.

U.S.A., Montana, Carbon County: Pryor Mountains: west end of the mountains, ca 9 air mi N or Warren; ca 16 air mi SE of Bridger.
Shallow soil on limestone pavement intermixed with redbeds. Phenology: fruiting.

U.S.A., Montana, Carbon County: Pryor Mountains: Custer National Forest: north rim of the mountains at the west end, ca 9 air mi N of Warren; ca 16 air mi SE of Bridger.
45.1919° N, 108.6255° W; uncertainty 0.5 mi., GPS reading
Moist area below low cliff with limber pine and sagebrush. Phenology: fruiting.

U.S.A., Montana, Carbon County: Pryor Mountains: along Red Pryor Mountain Road on 2 air mi SSE of Red Pryor Mountain summit, ca 28 air mi SE of Bridger.
45.0882° N, 108.4319° W; uncertainty 0.25 mi., GPS reading
Stony limestone slopes with bluebunch wheatgrass. Phenology: buds.

U.S.A., Montana, Carbon County: Pryor Mountains: Custer National Forest: tip of Cave Ridge, ca 27 air mi ESE of Bridger.
Limestone pavement and outcrops in Douglas fir forest on canyon rim. Phenology: flowering.

U.S.A., Montana, Carbon County: Beartooth Mountains: Custer National Forest: along Forest Road 2071 and Forest Road 21478 at intersection, ca 3 air mi SW of Red Lodge.
Limestone outcrop. Phenology: fruiting.
with Brian Elliott

U.S.A., Montana, Gallatin County: Gallatin Range: Gallatin National Forest: along Buffalo Horn Creek, ca 38-41 air mi S of Bozeman; from Buffalo Horn Trailhead to Tom Miner Trailhead.
South-facing limestone cliffs and talus. Phenology: vegetative only.
with Brian Elliott

U.S.A., Montana, Madison County: West, above Ruby River Valley: Trudau Lake.
T7S R4W S7 SE1/4
Stepped up limestone plateaus with Carex rupestris, Eriogonum ovalifolium, Machaeranthera canescens. Large old carpets of this species. Phenology: flowering.
Klaus H. Lackschewitz, 10321. 8/23/1982.
with Roger Rosentreter

U.S.A., Montana, Gallatin County: Rocky Canyon, near Bozeman.
Limestone mountains. Phenology: flowering.

U.S.A., Montana: West Gallatin Canyon.

U.S.A., Montana, Madison County: East of Melrose.
Flat ground; thin coarse gravelly soil; limestone hill; with Cer, Ag, sage, Stipa. Phenology: flowering.
George Hinman, Hi-3. 7/28/1934.

U.S.A., Montana: Jefferson National Forest: Spring Creek.
Southwest slope; rocky waste places, cliffs. Rare. Phenology: flowering.

U.S.A., Montana: Gallatin National Forest: Wilson-Bear Creek Divide.
South slope; open rocky cliff; growing on rocks. Scarce. Phenology: flowering & fruiting.

U.S.A., Montana, Gallatin County: Gallatin National Forest: Bald Mountain Trail.
Along trail on nearly vertical southwest slope; in crevices of nearly barren limestone cliff; Rare. Phenology: flowering.

U.S.A., South Dakota, Lawrence County: Black Hills National Forest: from ca 3.5 mi SW of Savoy, travel SE ca 0.13 mi from Forest Road 222.
zone 13N, 581892E, 4908810N; NAD 83, Specimen Label
Found covering limestone boulder, among ponderosa pine and common juniper. Some of the population was forming flowers, but most was vegetative. Savoy Quad Phenology: vegetative only.

U.S.A., Idaho, Custer County: Lost River Range: crest of ridge dividing East Fork and West Fork Pahsimeroi Rivers, 16.0 air mi NNW of Mackay.
Dominant population in xeric solid rock on barren ground, 14 degree slope, N aspect, limestone geology. Phenology: flowering.

U.S.A., Idaho, Custer County: Vicinity of Willow Creek Summit, 21.2 air mi E of Clayton.
Bedrock or scree in xeric barren ground vegetation; 10° slope, ENE aspect; alluvial geology. Population is dominant throughout the area. Phenology: flowering.

U.S.A., Idaho, Butte County: Challis National Forest: Lost River Range: lower Ramshorn Canyon, 13 air mi N of Arco.
Bedrock or scree in xeric barren ground vegetation; 14° slope, ESE aspect; silty, sandy limestone geology. Greater than 150 individuals apparent. Phenology: flowering.

U.S.A, Idaho, Lemhi County: Salmon National Forest: Salmon River Canyon: Salmon River Road N of USGS Point "Panther 6443", ca 1/4 mi E of the historical marker, 4.8 air mi SW of Shoup.
In mesic solid rock on barren ground, 46 degree slope, N aspect, gneiss geology. 25-75 plants estimated. Phenology: flowering & fruiting.

U.S.A., Wyoming, Lincoln County: Wyoming/Salt River Ranges: Salt River Range: north side of Forest Road 10211 (Swift Creek Road).
Rock crevices and cliffs. No elevation given. Phenology: flowering.

U.S.A, Idaho, Custer County: Challis National Forest: Lemhi Range: tributary gulch at the head of Uncle Ike Gulch, 30.0 air mi ENE of Mackay.
25-75 plants estimated in xeric solid rock within shrub-steppe vegetation, 5 degree slope, WSW aspect, limestone geology. 25-75 plants estimated. Phenology: flowering.

U.S.A., Idaho, Lemhi County: Salmon National Forest: Beaverhead Mountains: lower Railroad Canyon, 4.4 road mi NE of Leadore on Ida Hwy 29.
Limestone outcrops and talus slope to roadside. Phenology: flowering.
Annotated by Joshua J. Irwin.

U.S.A., Montana, Madison County: Tobacco Root Mountains: Dry Boulder Creek, ca 10 air mi NE of Twin Bridges; ca 18 air mi S of Whitehall.
Limestone rock outcrops. Phenology: flowering.
1. Petrophyton caespitosum (Nutt.) Rydb..
with Nicholas P. Freeland

U.S.A., Wyoming, Lincoln County: Southwestern Wyoming and Adjacent Utah: Crawford Mountain: on east flank of the mountain, ca 24 air mi W of Kemmerer.
Juniper woodland, limestone substrate, slopes and ridges. Phenology: vegetative only.

U.S.A., South Dakota, Lawrence County: Near mouth of Iron Creek, ca 1.5 mi N of Savoy.
44° 22.4' N, 103° 55.2' W; unknown, , Specimen Label
Limestone rock face, with Pellaea. Matted. Phenology: flowering & fruiting.