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Montana Field Guide

Montana Field Guides

Spiny Milkvetch - Astragalus kentrophyta


Global Rank: G5
State Rank: S4

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

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General Description
Mat-forming perennial from an intricately branched caudex. Herbage strigillose to villous. Stems basally prostrate; ascending portion 1–3 cm. Leaves with 3 to 7 narrowly lanceolate leaflets 3–9 mm long with mucronate tips; terminal leaflet confluent with the rachis; stipules 2–5 mm long, basally connate. Inflorescence of 1 to 3 flowers, shorter than the leaves. Flowers purple to white; calyx white- and/or black-strigillose; sepals 1–3 mm long; banner reflexed, 4–8 mm long; keel 3–7 mm long. Legume ovoid, 3–5 mm long, compressed, strigose(Lesica 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

Our plants are varieties kentrophyta and tegetarius (Wats.) Dorn.

Species Range
Present
 


Range Comments
AB, SK south to CA, AZ, NM and NE (Lesica 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

Summary of Observations Submitted for Montana
Number of Observations: 12

(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
Stony or gravelly, sparsely vegetated soil of grasslands, steppe, fellfields; 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:
Spiny Milkvetch — Astragalus kentrophyta.  Montana Field Guide.  .  Retrieved on , from