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Montana Field Guide

Montana Field Guides

Bent Milkvetch - Astragalus inflexus

Native Species

Global Rank: G4
State Rank: S4

Agency Status
MNPS Threat Rank:
C-value: 4

External Links

General Description
Cushion-forming from a branched caudex. Herbage silky-strigose with dolabriform hairs. Stems <3 cm long, clothed in stipules. Leaves trifoliolate; leaflets oblanceolate, 3–10 mm long, acute; stipules hyaline, 2–7 mm long, united behind the petiole. Inflorescence of 1 or 2 flowers, shorter than leaf petioles. Flowers ochroleucus; sepals 3–4 mm long; calyx white-sericeous; banner slightly reflexed, 12–15 mm long; keel 8–12 mm long, purple-tipped. Legume ascending, ovoid, 4–8 mm long, sericeous, hidden among leaves (Lesica 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

Diagnostic Characteristics
Similar to Astragalus purshii, from which it differs in having longer, more ascending stems (stems over 1.5dm). It also has longer calyx teeth than A. purshii (>4mm). Species of Oxytropis may appear similar, but lack elongated, leafy stems.

Species Range

Range Comments
MT to NE, south to CO (Lesica 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

Observations in Montana Natural Heritage Program Database
Number of Observations: 12

(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)

Sagebrush steppe and sparsely vegetated slopes.

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Citation for data on this website:
Bent Milkvetch — Astragalus inflexus.  Montana Field Guide.  .  Retrieved on , from