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Montana Field Guide

Montana Field Guides

Stalked-pod Locoweed - Oxytropis podocarpa

Species of Concern

Global Rank: G4G5
State Rank: S1
* (see State Rank Reason below)

Agency Status
MNPS Threat Rank: 3

External Links

State Rank Reason (see State Rank above)
Rare in Montana, where it is known from a small area of the Rocky Mountain Front. The remote habitat should limit the possibily of negative impacts.
General Description
Stalked-pod Crazyweed is a perennial that usually forms small, dense cushions. Its naked stems are erect or prostrate and up to 7 cm long. The basal leaves are 2-5 cm long and pinnately divided into 9-27 narrowly lance-shaped leaflets. The herbage is covered with stiff, silvery hairs. The 1-2 purple flowers resemble pea flowers and are held erect at the top of the stem. The corolla is 12-17 mm long, and the tubular calyx is purplish and 2/3 the length of the corolla. The papery, inflated pod is 15-25 mm long and ovoid in outline.

Flowering in June, fruiting late June-August.

Diagnostic Characteristics
This is our only purple-flowered Oxytropis with fewer than 4 flowers. Species of alpine Astragalus have leafy stems.

Species Range
Montana Range

Click the legend blocks above to view individual ranges.

Range Comments
AB to CO; Baffin Island to NL (Lesica 2012. Manual of Montana Vascular Plants. BRIT Press. Fort Worth, TX).

Summary of Observations Submitted for Montana
Number of Observations: 15

(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)

Gravelly ridges and slopes, often on limestone, in the alpine zone.
Predicted Suitable Habitat Model

This species has a Predicted Suitable Habit Model available.

To learn how these Models were created see

Ecological Systems Associated with this Species

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Citation for data on this website:
Stalked-pod Locoweed — Oxytropis podocarpa.  Montana Field Guide.  .  Retrieved on , from