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Montana Field Guide

Montana Field Guides

Canadian Milkvetch - Astragalus canadensis


Global Rank: G5
State Rank: S5

Agency Status
USFWS:
USFS:
BLM:
MNPS Threat Rank:
C-value: 3

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General Description
Rhizomatous perennial. Herbage sparsely to densely strigose with dolabriform hairs. Stems erect, 15–60 cm. Leaves with 11 to 23, narrowly elliptic leaflets, 1–4 cm long with blunt to rounded tips; stipules lanceolate-attenuate, 5–10 mm long. Inflorescence longer than the leaves, crowded with 30 to 100 spreading to declined flowers. Flowers ochroleucus; calyx black- and/or white-strigose; sepals 2–4 mm long; banner12–15 mm long, becoming moderately reflexed; keel 8–12 mm long, sometimes purple-tipped. Legume erect, elliptic to cylindric, 9–15 mm long, crowded (Lesica 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

In Montana we have varieties canadensis, brevidens (Gand.) Barneby, and mortonii (Nutt.) S. Watson.

Range Comments
BC to QC south to CA, CO, TX, AR and VA (Lesica 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

Habitat
Grasslands, steppe, open forest, thickets; plains, valleys, montane (Lesica 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

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