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Montana Field Guide

Montana Field Guides

Western Sweet-vetch - Hedysarum occidentale

Native Species

Global Rank: G5
State Rank: S4S5
C-value: 5

Agency Status


External Links

General Description
Stems erect, 20–80 cm. Herbage sparsely strigillose. Leaves with 9 to 21 lanceolate to ovate leaflets 1–3 cm long with rounded tips; stipules 5–25 mm long. Flowers deep pink to purple; calyx tube 2–3 mm long, strigose; sepals deltoid to linear, unequal; keel 15–20 mm long. Loment sparsely strigose with 1 to 4 reticulate segments, 6–10 mm wide (Lesica et al. 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

Species Range

Range Comments
WA to MT south to ID, WY and CO (Lesica et al. 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

Observations in Montana Natural Heritage Program Database
Number of Observations: 112

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Relative Density



(Observations spanning multiple months or years are excluded from time charts)


The following animal species have been reported as pollinators of this plant species or its genus where their geographic ranges overlap: Bombus frigidus (Williams et al. 2014).

  • Literature Cited AboveLegend:   View Online Publication
    • Lesica, P., M.T. Lavin, and P.F. Stickney. 2012. Manual of Montana Vascular Plants. Fort Worth, TX: BRIT Press. viii + 771 p.
    • Williams, P., R. Thorp, L. Richardson, and S. Colla. 2014. Bumble Bees of North America. Princeton, NJ: Princeton University Press. 208 p.
  • Additional ReferencesLegend:   View Online Publication
    Do you know of a citation we're missing?
    • Johnson, T. W. 1982. An analysis of pack and saddle stock grazing areas in the Bob Marshall Wilderness. M.Sc.Thesis. Bozeman, MT: Montana State University. 105 p.
  • Web Search Engines for Articles on "Western Sweet-vetch"
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Citation for data on this website:
Western Sweet-vetch — Hedysarum occidentale.  Montana Field Guide.  .  Retrieved on , from