Page authors: Don Knoke, David Giblin
Astragalus reventiformis
Yakima milk-vetch

Distribution: Occurring east of the Cascades crest in Washington; Washington to Sherman County in Oregon.

Habitat: Shrub-steppe to low, dry, open ponderosa pine forests.

Flowers: April-June

Origin: Native

Growth Duration: Perennial

Conservation Status: Not of concern


Perennial from a woody taproot and short, branched crown, the many stems 2-12 cm. tall, usually grayish-silky.


Leaves alternate, pinnate, numerous, crowded, 7-30 cm. long; leaflets 17-37, linear to oblong-oblanceolate, 3-25 mm. long and 1-4 mm. wide, with fine, appressed hairs on both surfaces or glabrous above; stipules triangular, 3-7 mm. long, clasping or free.


Inflorescence of lax, 7- to 35-flowered racemes, the peduncles exceeding the leaves; flowers pea-like, 13-23 mm. long, white, drooping; calyx tube bell-shaped, 1.5 times as long as thick; calyx 7-9 mm. long, the 5 teeth 2.5-5 mm. long; banner reflexed; wings 2-4 mm. longer than the rounded keel; stamens 10.


Pods with a short stipe, glabrous, green and reddish, obcompressed, nearly straight, 15-30 mm. long and 3-6 mm. wide and twice as thick, abruptly acute, 1-celled, but the lower suture nearly dividing the cavity.

Accepted Name:
Astragalus reventiformis (Rydb.) Barneby
Publication: Amer. Midl. Naturalist 55(2): 492. 1956. 1956.

Synonyms & Misapplications:
Astragalus reventus A. Gray var. canbyi M.E. Jones
Cnemidophacos reventiformis Rydb.
Additional Resources:

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

WA Flora Checklist: Astragalus reventiformis checklist entry.

E-Flora BC: Astragalus reventiformis atlas page.

CalPhotos: Astragalus reventiformis photos.

USDA Plants: Astragalus reventiformis information.

55 photographs:
Group by