Distribution: Occurring east of the Cascades crest in Washington; British Columbia south to California.
Habitat: Shrub-steppe, grassland, and open ponderosa pine forests.
Conservation Status: Not of concern
Robust perennial herb with numerous stems from a branched root crown.
Alternate, palmately compound with 9-11 narrow variously pubescent leaflets.
Yellow or white, 9-12 mm long, pea-like.
Pea-like pods 2-3 cm long.
Compared to other Lupinus species, has fairly small flowers with the banner (upper petal) not much reflexed and either glabrous or only slightly pubescent. Also note the yellow to white flowers and palmately compound leaves with relatively narrow leaflets.
This is a difficult genus and the key in Hitchcock and Cronquist 1973 is out of date.