CPC National Collection Plant Profile

Astragalus barrii

Photographer:
J. Locklear

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CPC National Collection Plant Profile

Astragalus barrii


Family: 
Fabaceae  
Common Name: 
Barr's milkvetch
Author: 
Barneby
Growth Habit: 
Forb/herb
CPC Number: 
371

Distribution
Protection
Conservation
References


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Astragalus barriienlarge
Photographer: J. Locklear
jlocklear1[at]unl.edu
Image Owner: Nebraska Statewide Arboretum

Astragalus barriienlarge
Photographer: J. Locklear
jlocklear1[at]unl.edu
Image Owner: Nebraska Statewide Arboretum


Astragalus barrii is Not Sponsored
Primary custodian for this plant in the CPC National Collection of Endangered Plants is: 
Jim Locklear contributed to this Plant Profile.

 
Astragalus barrii


Springtime is fleeting in the Powder River country of eastern Wyoming and Montana, but at its peak it turns the tops of bluffs and buttes into rock gardens of remarkable beauty. An assortment of low-growing plants grace these windswept places, including Barr's milkvetch, a cushion-forming plant with silvery foliage and rose-purple blossoms that is limited to this region of the Great Plains.

Distribution & Occurrence

State Range
  Montana
Nebraska
South Dakota
Wyoming
State Range of  Astragalus barrii
Habitat
  Buttes, hilltops, badlands, and gullied knolls and draws, in shallow rocky soils derived from limestone, calcareous sandstone, shale or siltstone. Occurs in cushion plant communities within more densely vegetated mixed grass prairie. Elevation 2940-4000 ft.

Distribution
  Centered in the Powder River Basin of northeastern Wyoming (Campbell, Johnson, Natron, Niobrara, Sheridan and Weston counties) and adjacent southeastern Montana (Big Horn, Carter, Powder River and Rosebud counties), to southwestern South Dakota (Fall River, Shannon and Pennington counties) and northwestern Nebraska (Dawes County).

Number Left
  Montana: 33 occurrences (Fertig 2000).
Nebraska: 1 occurrence (Weedon 2001).
South Dakota: 7 occurrences (Ode 1988).
Wyoming: 26 occurrences (Hartman and Nelson 1995).

Protection

Global Rank:  
G3
 
4/15/1999
Guide to Global Ranks
Federal Status:  
RT
 
1/19/1996
Guide to Federal Status
Recovery Plan:  
No
 

State/Area Protection
  State/Area Rank Status Date  
  Montana S2 WL 5/29/1991  
  Nebraska  
  South Dakota S3 2/27/1990  
  Wyoming S3 E234 2/6/1992  

Conservation, Ecology & Research

Ecological Relationships
 

Threats
 

Current Research Summary
  Successfully propagated from seed using scarification pretreatment (Nebraska Statewide Arboretum).

Current Management Summary
 

Research Management Needs
 

Ex Situ Needs
 

References

Books (Single Authors)

Barneby, R.C. 1964. Atlas of North American Astragalus. Bronx, New York: New York Botanical Garden. 1188p.

Isely, D. 1998. Native and Naturalized Leguminosae (Fabaceae) of the United States (exclusive of Alaska and Hawaii). Salt Lake City, Utah: Monte L. Bean Life Science Museum, Brigham Young University.

Electronic Sources

Fertig, W. (2000). State Species Abstracts. Wyoming Natural Diversity Database. http://uwadmnweb.uwyo.edu/wyndd/Plants/plant_species.htm. Accessed: 2002.

Journal Articles

Barneby, R.C. 1956. Pugillus Astragalorum XIX: Notes on A. sericoleucus Gray and its immediate relatives. American Midland Naturalist. 55, 504-507

Isely, D. 1983. New combinations and two new varieties on Astragalus, Orophaca, and Oxytropis (LEGUMINOSAE). Systematic Botany. 8, 4: 421.

Ode, D. 1988. Four endemic plants of the northern Great Plains. Proceedings of the North Dakota Academy of Science. 42: 7.

Ode, D. 1990. Dakota Flora: Barr's Milkvetch. South Dakota Conservation Digest. 57, 3: 24.

Personal Communications

Weedon, R. 2001. Professor, Chadron State College, Chadron, NE. Personnal conversation with Jim Locklear, Nebraska Statewide Arboretum.

Reports

Hartman, R.L.; Nelson, B.E. 1995. Final report on the general floristic inventory of the southern Powder River Basin and eastern plains, Wyoming. Casper, WY: Unpublished report prepared for the Bureau of Land Management. p.12 + appendices.

Locklear, J. 1987. Plant Conservation Activities: 1987 Annual Report. Lincoln, NE: From the Nebraska Statewide Arboretum to the Center for Plant Conservation. p.3.

MTNHP. 2002. Montana Rare Plant Field Guide. Montana Natural Heritage Program.

Roe, Lisa Schassberger. 1988. Status Review of Astragalus barrii, U.S.D.A. Forest Service, Region 1, Custer National Forest, Montana. Helena, MT: Montana Natural Heritage Program. p.21.

Roe, Lisa Schassberger. 1990. Report on the conservation status of Astragalus barrii, a candidate threatened species. Helena, Montana: Montana Natural Heritage Program. p.86.

Schassberger, L.A. 1990. Report on the Conservation Status of Astragalus barrii: a candidate threatened species. Helena, MT.: Montana Natural Heritage Program. p.86.


  This profile was updated on 9/28/2010
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