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Montana Field Guide

Montana Field Guides

Least Bladdery Milkvetch - Astragalus microcystis


Global Rank: G5
State Rank: S4

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

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General Description
Perennial from an intricately branched caudex. Herbage strigose to villous. Stems prostrate, ascending at the tip, 10–50 cm. Leaves with 9 to 15 linear-elliptic leaflets, 5–15 mm long with rounded to acute tips; stipules 3–5 mm long, basally connate, turning black with drying. Inflorescence open with 5 to 10 spreading flowers. Flowers pink to purple, often with white wings; calyx white- or black-strigillose; sepals 1–2 mm long; banner 6–9 mm long, reflexed; keel 4–5 mm long. Legume pendent, obovoid, inflated, papery, white-strigillose, 5–10 mm long (Lesica 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

Species Range
Present
 


Range Comments
WY, ID and MT (Lesica 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

Summary of Observations Submitted for Montana
Number of Observations: 3

(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, fellfields or on streambanks; 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:
Least Bladdery Milkvetch — Astragalus microcystis.  Montana Field Guide.  .  Retrieved on , from