Page authors: Don Knoke, David Giblin
Astragalus leibergii
Leiberg's milk-vetch

Distribution: Endemic to Douglas, Kittitas and Chelan counties of central Washington.

Habitat: Dry hillsides and plains, commonly in sagebrush scabland on basalt.

Flowers: April-June

Origin: Native

Growth Duration: Perennial

Conservation Status: Not of concern

Pollination: Bumblebees, bees, butterflies


Tufted perennial from a woody taproot and many-branched crown, the numerous stems 1- 10 cm. long, silky-gray or greenish, shorter than the leaves and peduncles.


Leaves pinnate, 8-28 cm. long; leaflets 15-31, linear to lance-elliptic, 4-10 mm. long; stipules scarious, clasping and united into a sheath.


Inflorescence of loose, 7- to 20-flowered racemes, the peduncles stout, erect, 10-28 cm. long; flowers nodding, whitish, 11.5-16.5 mm. long; calyx 5.5-9.5 mm. long, with long, soft, black hairs, the bell-shaped tube 3-5.5 mm. long, the 5 teeth 1.5-4 mm. long; banner longer than the wings; stamens 10.


Pod erect, with a stipe 3-8 mm. long, the body oblong-elipsoid, 16-27 mm. long and 4-7.5 mm. wide, keeled on the back, cordate in cross section.

Accepted Name:
Astragalus leibergii M.E. Jones
Publication: Proc. Calif. Acad. Sci., ser. 2, 5(18): 663-664. 1895. 1895.

Synonyms & Misapplications:
Astragalus arrectus A. Gray var. leibergii (M.E. Jones) M.E. Jones
Additional Resources:

PNW Herbaria: Specimen records of Astragalus leibergii in the Consortium of Pacific Northwest Herbaria database

WA Flora Checklist: Astragalus leibergii checklist entry

OregonFlora: Astragalus leibergii information

E-Flora BC: Astragalus leibergii atlas page

CalPhotos: Astragalus leibergii photos

53 photographs:
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