The sickle-keeled lupine (Lupinus albicaulis) belongs to Fabaceae (the Pea family). It is a perennial herb that is native to the western United States, from Washington to California. This herb grows on open dry slopes in foothills and mountains, and it can reach 30-90 cm in height. The leaves are palmately divided into 5–10 leaflets. The dull white, purple, or yellow flowers bloom in long spikes in mid summer. The flower has a sickle-shaped keel. The fruit is a silky-hairy legume pod up to 5 cm long containing several seeds.