Lupinus nanus, the sky lupine, field lupine, dwarf lupin, ocean-blue lupine or Douglas' annual lupine, is a species of lupine native to the western United States. It is found natively in California, Nevada, and on Steens Mountain in eastern Oregon. It tends to grow on slopes and in open or disturbed areas below 1300 meters.

It grows 6 to 20 inches (15 to 51 cm) tall with blue flowers containing white or yellow spots. It is an annual plant that blooms in the months of March, April and May.

It contains anagyrine and is considered toxic if directly ingested. Among the biologically active chemicals found in the plant are genistein, 2'-hydroxygenistein, luteone and wighteone.

...