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Montana Field Guide

Montana Field Guides

Ruby Valley Locoweed - Oxytropis riparia
Other Names:  Ruby Valley Crazyweed

Non-native Species

Global Rank: GNR
State Rank: SNA

Agency Status
MNPS Threat Rank:
C-value: 0

External Links

General Description
Stems ascending to sprawling, 20–60 cm. Herbage glabrate to sparsely strigose. Leaflets 11 to 15, narrowly ovate, 1–4 cm long. Stipules herbaceous, lanceolate, 4–10 mm long, adnate to the petiole. Inflorescence axillary racemes 1–25 cm long with 3 to 30 flowers, longer than the leaves. Flowers purple; calyx white- and/or black-strigose; sepals 1–2 mm long; banner 6–7 mm long. Legumes pendent, 1–2 cm long with a short stipe, white-strigose, somewhat compressed perpendicular to the grooved upper suture (Lesica 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

Species Range

Range Comments
Introduced for forage sporadically to MT, WY, and ID; native to Eurasia (Lesica 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

Observations in Montana Natural Heritage Program Database
Number of Observations: 55

(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)


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Citation for data on this website:
Ruby Valley Locoweed — Oxytropis riparia.  Montana Field Guide.  .  Retrieved on , from