Oxytropis sericea

Silky locoweed is a nitrogen fixing perennial that grows from the Yukon down into New Mexico, east to Oklahoma and west to the White Mountains of California. The silky white foliage and indigo blue flowers make it a standout in the harsh environments it lives in. It is poisonous to livestock, but them seldom eat it unless left in an overgrazed paddack. Oxytropis is used by the larva of many butterfly species.