Home/Species/ Threeleaf Milkvetch

Astragalus gilviflorus

Sheldon

Threeleaf Milkvetch

G5Secure Found in 20 roadless areas NatureServe Explorer →

G5SecureGlobal Rank

Identity

Unique IDELEMENT_GLOBAL.2.128260

Element CodePDFAB0F3S0

Record TypeSPECIES

ClassificationSpecies

Classification StatusStandard

Name CategoryVascular Plant

Endemicoccurs (regularly, as a native taxon) in multiple nations

KingdomPlantae

PhylumAnthophyta

ClassDicotyledoneae

OrderFabales

FamilyFabaceae

GenusAstragalus

Synonyms

Orophaca triphyllaBritt.

Other Common Names

Astragale à fleurs jaunes (FR) Cushion Milkvetch (EN) plains milkvetch (EN) Plains Milkvetch (EN)

Concept Reference

Kartesz, J.T. 1994. A synonymized checklist of the vascular flora of the United States, Canada, and Greenland. 2nd edition. 2 vols. Timber Press, Portland, OR.

Conservation Status

Rank MethodExpertise without calculation

Review Date2016-07-19

Change Date1990-01-09

Edition Date1993-07-28

Edition AuthorsStoner, N., rev. D. Gries (1998)

Rank Reasons

Astragalus gilviflorus is found from the east base of the Rocky Mountains, from Montana to Colorado east to Saskatchewan and Nebraska. It is infrequent to locally common in the Great Plains and is increasingly rare in the outer reaches of its range, such as Colorado (two occurrences) and Idaho (six occurrences).

Range Extent Comments

East base of the Rocky Mountains, from Montana to Colorado east to Saskatchewan and Nebraska. Found in southwestern Clark County, Idaho, and from Bear River Valley and Echo Canyon, Rich, Summit, and Daggett Counties, Utah.

Occurrences Comments

Two occurrences in two counties in Colorado. In Idaho, known from six occurrences (Idaho Native Plant Society, 1992).

Threat Impact Comments

USFS: Livestock grazing occurs in this habitat area. Mineral development is a potential threat.

Ecology & Habitat

Habitat

Barren knolls, stony hilltops, gullied bluffs and badlands, on limestone, shale or sandstoner in sagebrush communities at 5340-6590 feet.

Terrestrial Habitats

Shrubland/chaparralBarrens

Other Nations (2)

United StatesNNR

Province	Rank	Native
Montana	S4	Yes
Idaho	S2	Yes
Nebraska	SNR	Yes
Oklahoma	S1	Yes
Colorado	S2	Yes
North Dakota	SNR	Yes
Kansas	SNR	Yes
South Dakota	SNR	Yes
Wyoming	S4	Yes
Utah	SNR	Yes

CanadaN5

Province	Rank	Native
Saskatchewan	S5	Yes
Alberta	S3	Yes
Manitoba	S1	Yes

Plant Characteristics

Economic Value (Genus)Yes

Roadless Areas (20)

Montana (11)

Area	Forest	Acres
Big Snowy Mountains Wsa	Lewis and Clark National Forest	88,003
Cayuse Mountain	Helena National Forest	20,146
Gallatin Fringe	Gallatin National Forest	51,571
Hellgate Gulch	Helena National Forest	16,821
Lost Water Canyon	Custer National Forest	9,251
Lost Water Canyon Rna	Custer National Forest	561
Mt. Gmt Area H	Custer National Forest	1,335
North Absaroka	Gallatin National Forest	159,075
North Absaroka	Custer National Forest	21,063
Tenderfoot - Deep Creek	Lewis and Clark National Forest	85,614
Tongue River Breaks	Custer National Forest	17,481

North Dakota (5)

Area	Forest	Acres
Bell Lake	Dakota Prairie Grasslands	11,265
Long X Divide	Dakota Prairie Grasslands	10,099
Magpie	Dakota Prairie Grasslands	21,281
Ponderosa Pine	Dakota Prairie Grasslands	7,471
Wannagan	Dakota Prairie Grasslands	6,026

Wyoming (4)

Area	Forest	Acres
Rock Creek	Bighorn National Forest	48,657
South Beartooth Highway	Shoshone National Forest	105,570
South Fork	Shoshone National Forest	64,903
Sulphur Creek	Shoshone National Forest	30,221

References (4)

Great Plains Flora Association (R.L. McGregor, coordinator; T.M. Barkley, ed., R.E. Brooks and E.K. Schofield, associate eds.). 1986. Flora of the Great Plains. University Press of Kansas, Lawrence, Kansas. 1392 pp.
Idaho Native Plant Society. 1992. Federal candidate (C1 and C2) and listed rare plants of Idaho. unpaginated.
Kartesz, J.T. 1994. A synonymized checklist of the vascular flora of the United States, Canada, and Greenland. 2nd edition. 2 vols. Timber Press, Portland, OR.
Spahr, R., L. Armstrong, D. Atwood, and M. Rath. 1991. Threatened, endangered, and sensitive species of the Intermountain Region. U.S. Forest Service, Intermountain Region, Ogden, UT.