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Montana Field Guide

Montana Field Guides

Alpine Milkvetch - Astragalus alpinus


Global Rank: G5
State Rank: S4

Agency Status
USFWS:
USFS:
BLM:
MNPS Threat Rank:
C-value: 4

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General Description
Perennial with a widely branched caudex. Herbage sparsely strigose. Stems 5–30 cm, ascending to erect. Leaves with 13 to 25 elliptic leaflets with rounded tips, 8–20 mm long; stipules ovate, distinct. Inflorescence loose, with 8 to 25 spreading flowers. Flowers purple with white wings and petal bases; sepals 1–2 mm long; calyx black-strigose; banner reflexed, 7–12 mm long; keel ca. as long. Legume narrowly elliptic, black-strigose, 8–14 mm long, shallowly grooved, pendant with a stipe 1–2 mm long (Lesica 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

Montana plants are variety alpinus.

Species Range
Present
 


Range Comments
Circumboreal, south to NV, NM and MB (Lesica 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

Summary of Observations Submitted for Montana
Number of Observations: 13

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

Recency

 

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



Habitat
Stony, soil of tundra, moist meadows, gravel bars, forest openings; montane to alpine (Lesica 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

References
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Citation for data on this website:
Alpine Milkvetch — Astragalus alpinus.  Montana Field Guide.  .  Retrieved on , from