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Montana Field Guide

Montana Field Guides

American Milkvetch - Astragalus americanus


Global Rank: G5
State Rank: S4

Agency Status
USFWS:
USFS:
BLM:
MNPS Threat Rank:
C-value: 6

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General Description
Perennial with a woody caudex. Herbage glabrate to sparsely strigose. Stems erect, hollow, 50–100 cm. Leaves with 11 to 15 narrowly elliptic leaflets, 2–5 cm long; stipules oblong, reflexed, 1–2 cm long, distinct. Inflorescence loose with 15 to 40 nodding flowers. Flowers ochroleucus; sepals ciliate, <1 mm long; banner, 11–15 mm long; keel nearly as long. Legume 15–25 mm long, glabrous, narrowly ellipsoid, terete, pendant with a stipe 4–7 mm long (Lesica 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

Species Range
Present
 


Range Comments
AK to ON south to BC, CO and MB (Lesica 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

Summary of Observations Submitted for Montana
Number of Observations: 5

(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
Open forest, woodlands, thickets, moist meadows, often along streams; valleys to lower subalpine (Lesica 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

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