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Montana Field Guide

Montana Field Guides

Groundplum Milkvetch - Astragalus crassicarpus

Native Species

Global Rank: G5
State Rank: S4

Agency Status
MNPS Threat Rank:
C-value: 4

External Links

General Description
Perennial from a branched caudex. Herbage sparsely to densely strigose. Stems prostrate to ascending, 5–40 cm. Leaves with 13 to 21 narrowly oblong leaflets, 5–20 mm long with rounded tips; stipules lanceolate, 3–8 mm long, distinct. Inflorescence shorter than the leaves, crowded, of 5 to 20 spreading to ascending flowers. Flowers purple or white and purple-tipped; calyx black- and/or white-strigose; sepals 2–4 mm long; banner 22–30 mm long, moderately reflexed; keel 14–20 mm long. Legume spreading, globose, glabrous, 13–20 mm long, fleshy, becoming hard, leathery (Lesica 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

Montana plants are varieties crassicarpus and paysonii (E.H. Kelso) Barneby.

Species Range

Range Comments
AB, SK south to AZ, NM, TX and AR (Lesica 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

Observations in Montana Natural Heritage Program Database
Number of Observations: 15

(Click on the following maps and charts to see full sized version) Map Help and Descriptions
Relative Density



(Observations spanning multiple months or years are excluded from time charts)


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Citation for data on this website:
Groundplum Milkvetch — Astragalus crassicarpus.  Montana Field Guide.  .  Retrieved on , from