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Montana Field Guide

Montana Field Guides

Park Milkvetch - Astragalus leptaleus

Status Under Review
Native Species

Global Rank: G3G4
State Rank: S3?

Agency Status
MNPS Threat Rank:
C-value: 6

External Links

General Description
Perennial from rhizome-like caudex branches. Herbage glabrate to sparsely strigose. Stems erect to ascending, 5–25 cm. Leaves with 13 to 19 linear-lanceolate leaflets, 3–15 mm long with acute tips; stipules 1–4 mm long, connate. Inflorescence sparse with 1 to 5 spreading flowers, shorter than the leaves. Flowers white; calyx black strigose; sepals 1–3 mm long; banner 8–12 mm long, moderately reflexed; keel 6–8 mm long with a purple tip. Legume pendent, narrowly elliptic, flattened, sparsely black-and white-strigose, 8–14 mm long (Lesica 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

Species Range

Range Comments
Regional endemic with a bimodal distribution in north-central Idaho and western Montana, and southeastern Wyoming and central Colorado.

Observations in Montana Natural Heritage Program Database
Number of Observations: 8

(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)

Moist or wet, often alkaline meadows in the valley, foothills, and montane zones.

  • Additional ReferencesLegend:   View Online Publication
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    • Lesica, P., M.T. Lavin, and P.F. Stickney. 2012. Manual of Montana Vascular Plants. Fort Worth, TX: BRIT Press. viii + 771 p.
    • Vanderhorst, J.P. and P. Lesica. 1994. Sensitive plant survey in the Tendoy Mountains, Beaverhead County, Montana. Unpublished report to the Bureau of Land Management, Butte District. Montana Natural Heritage Program, Helena, MT. 59 pp. plus appendices.
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Citation for data on this website:
Park Milkvetch — Astragalus leptaleus.  Montana Field Guide.  .  Retrieved on , from