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Montana Field Guide

Montana Field Guides

Threeleaf Milkvetch - Astragalus gilviflorus


Global Rank: G5
State Rank: S4

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

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General Description
Cushion-forming from a branched caudex. Herbage silvery-sericeous with basifixed and dolabriform hairs. Stems <3 cm long, clothed in stipules. Leaves trifoliolate; leaflets oblanceolate, 5–20 mm long, acute; stipules hyaline, ciliate, 6–13 mm long, united behind the petiole. Inflorescence of 1 or 2 flowers, shorter than leaf petioles. Flowers ochroleucus; sepals 2–4 mm long; calyx strigose; banner slightly reflexed, 15–30 mm long; keel 10–22 mm long, often purple-tipped. Legume ascending, ovoid, 6–10 mm long, sericeous, enclosed in the calyx (Lesica 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

Species Range
Present
 


Range Comments
East base of the Rocky Mountains, from Montana to Colorado east to Saskatchewan and Nebraska. Found in southwestern Clark County, Idaho, and from Bear River Valley and Echo Canyon, Rich, Summit, and Daggett Counties, Utah.

Summary of Observations Submitted for Montana
Number of Observations: 94

(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
Sandy or gravelly soil of grasslands, sagebrush steppe, barren slopes; plains, valleys (Lesica 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

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