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Montana Field Guide

Montana Field Guides

Timber Milkvetch - Astragalus miser


Global Rank: G5
State Rank: S5

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

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General Description
Perennial with a branched caudex. Herbage glabrate to strigose or villous with dolabriform hairs. Stems 5–30 cm, prostrate to ascending. Leaves with 9 to 17 linear to ovate leaflets, 5–25 mm long with rounded to acute tips; stipules lanceolate, 2–4 mm long, basallay connate. Inflorescence barely longer than the leaves, open with 5 to 10 spreading flowers. Flowers white to purple; calyx black- and or white-strigose; sepals ca. 1 mm long; banner 8–12 mm long, reflexed; keel 6–10 mm long, often purple-tipped. Legume pendent, glabrous to white-strigillose, 15–30 mm long flattened, linear (Lesica 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

Six varieties occur in Montana: var. miser, var. crispatus (M.E. Jones) Cronq., var. decumbens (Nutt. ex Torr. & A. Gray) Cronq., var. hylophilus (Rydb.) Barneby, var. praeteritus Barneby, and var. serotinus (A. Gray ex Cooper) Barneby.

Species Range
Present
 


Range Comments
BC, AB south to AZ, CO and SD (Lesica 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

Summary of Observations Submitted for Montana
Number of Observations: 59

(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
Grasslands, sagebrush steppe, open forest; valleys to subalpine (Lesica 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

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