Astragalus laxmannii var. robustior Jacq. (Hook.) Barneby & S.L. Welsh
standing milk-vetch (prairie milkvetch)
Fabaceae (Pea family)

Introduction to Vascular Plants

Photograph

© Virginia Skilton     (Photo ID #34028)


Map

E-Flora BC Static Map

Distribution of Astragalus laxmannii var. robustior
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Species Information

General:
Perennial herb from a taproot surmounted by a superficial root-crown or short-branching stem-base; stems several to many, tufted, decumbent to erect, 10-40 cm.
Leaves:
Alternate, pinnately compound, 4-15 cm long; leaflets 9 to 23, narrowly oblong to elliptic, 1-3 cm long, appressed-hairy; stipules papery, fused
Flowers:
Inflorescence a dense, head-like or spike-like, axillary raceme of 15 to 50 short-stalked, ascending, pea-like flowers, the raceme-stalks 5-15 cm long; corollas white to purplish, 12-18 mm long, the banner 1-3 mm longer than the wings, which are 2-3 mm longer than the keel; cal yces 5-10 mm long, appressed-hairy with mixed black and white hairs, the awl-shaped teeth from 1/3 as long to as long as the tube.
Fruits:
Pods, cylindric to narrowly egg-shap ed, unstalked or on stalks to 1.5 mm long, erect, membranous, 7-12 mm long, densely appressed-hairy, deeply grooved on one side

SourceThe Illustrated Flora of British Columbia

Illustration

If more than one illustration is available for a species (e.g., separate illustrations were provided for two subspecies) then links to the separate images will be provided below. Note that individual subspecies or varietal illustrations are not always available.

Habitat and Range

Mesic to dry grasslands, grassy bluffs, open gravelly flats, river terraces and rocky slopes in the steppe and montane zones; infrequent in E BC; amphiberingian, N to YT, E to ON and S to MN, NM and WA;

SourceThe Illustrated Flora of British Columbia

Synonyms

Synonyms and Alternate Names:
Astragalus adsurgens Pall.
Astragalus adsurgens subsp. robustior (Hook.) S.L. Welsh
Astragalus adsurgens var. robustior Hook.
Astragalus striatus Nutt.
Astragalus sulphurescens Rydb.