Distribution: Endemic to Douglas, Kittitas and Chelan counties of central Washington.
Habitat: Dry hillsides and plains, commonly in sagebrush scabland on basalt.
Growth Duration: Perennial
Conservation Status: Not of concern
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.
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.
USDA Plants: Astragalus leibergii information.