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Montana Field Guide

Montana Field Guides

American Purple Vetch - Vicia americana

Native Species

Global Rank: G5
State Rank: S5

Agency Status
MNPS Threat Rank:
C-value: 3

External Links

General Description
Rhizomatous perennial. Stems prostrate to ascending or climbing, 10–100 cm. Herbage glabrate to sparsely strigose. Leaves with a simple or branched tendril; the 6 to 14 leaflets ovate to linear, 1–4 cm long, mucronate with rounded to retuse tips; stipules dentate, 2–8 mm long. Racemes secund, loose with 2 to 8 flowers. Flowers blue to purple, 14–22 mm long; calyx glabrous to sparsely villous, the deltoid sepals 1–3 mm long, the upper shorter. Legume stipitate, narrowly elliptic, 2–3 cm long (Lesica 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

Our plants are varieties americana and minor Hook.

Species Range

Range Comments
Widespread in North America.

Observations in Montana Natural Heritage Program Database
Number of Observations: 649

(Click on the following maps and charts to see full sized version) Map Help and Descriptions
Relative Density



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

Grasslands, meadows, woodlands, open forest; plains, valleys, montane (Lesica 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).)

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Citation for data on this website:
American Purple Vetch — Vicia americana.  Montana Field Guide.  .  Retrieved on , from