About Lupinus sulphureus Douglas
Lupinus sulphureus Douglas is a perennial herbaceous plant that grows 40 to 80 cm tall. Its leaves are palmately compound, bearing 7 to 13 leaflets that are each 2 to 5 cm long. Its flowers form whorls along a 12 to 20 cm long spike. It is native to western North America, ranging from southern British Columbia south through Washington to Oregon. The endangered Fender's blue butterfly is host-specific to Kincaid's lupine, a variety of this species. Fender's blue butterfly larvae eat the plant's leaves in the fall, spend the winter among the plant's roots, and continue feeding on the leaves in spring before pupating.
