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Montana Field Guide

Montana Field Guides

Indian Milkvetch - Astragalus australis
Other Names:  Astragalus aborigenum


Global Rank: G5
State Rank: S4

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

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General Description
Herbaceous perennial. Herbage densely to sparsely villous. Stems 6–40 cm, spreading or ascending from a branched caudex. Leaves short-petiolate with 7 to 15 narrowly lanceolate to elliptic leaflets 5–25 mm long; lower stipules ovate and united opposite the petiole, becoming lance-attenuate and distinct above. Inflorescence with 5 to 25 spreading to declined flowers. Flowers white; calyx black-strigillose; sepals 2–3 mm long; banner upturned, 7–10 mm long; keel 5–8 mm long, purple-tipped. Legume crescent-shaped, laterally compressed, 1–2 cm long, glabrous, nodding with a stipe 2–8 mm long (Lesica 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

Our plants are variety glabriusculus (Hook.) Isley.

Species Range
Present
 


Range Comments
Circumboreal south to OR, CO and ND (Lesica 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

Summary of Observations Submitted for Montana
Number of Observations: 6

(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
Sparsely vegetated, stony soil of grasslands, fellfields, exposed slopes; plains, valleys 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:
Indian Milkvetch — Astragalus australis.  Montana Field Guide.  .  Retrieved on , from