E-Flora BC: Electronic Atlas of the Flora of British Columbia

Astragalus laxmannii Jacq.
Laxmann's Milk-vetch (standing milk-vetch)
Fabaceae (Pea family)

Introduction to Vascular Plants

© Virginia Skilton  Email the photographer   (Photo ID #13991)

E-Flora BC Static Map
Distribution of Astragalus laxmannii
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Species Information

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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.
Alternate, pinnately compound, 4-15 cm long; leaflets 9 to 23, narrowly oblong to elliptic, 1-3 cm long, appressed-hairy; stipules papery, fused
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.
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

Source: The Illustrated Flora of British Columbia

Habitat / 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;

Source: The Illustrated Flora of British Columbia


Ecological Framework for Astragalus laxmannii

The table below shows the species-specific information calculated from
original data (BEC database) provided by the BC Ministry of Forests and Range.
(Updated August, 2013)

Site Information
Value / Class




Elevation (metres) 750 780 810
Slope Gradient (%) 0 2 4
Aspect (degrees)
[0 - N; 90 - E; 180 - S; 270 - W]
278 278 278
Soil Moisture Regime (SMR)
[0 - very xeric; 4 - mesic;
8 - hydric]
4 4 4
Modal Nutrient Regime
Number of field plots
 species was recorded in:
Modal BEC Zone Class
All BEC Zones (# of stations/zone) species was recorded in: IDF(1), PP(1)


The climate type for this species, as reported in the: "British Columbia plant species codes and selected attributes. Version 6 Database" (Meidinger et al. 2008), is not evaluated, unknown or variable.

Taxonomic and Nomenclatural Links

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General References