Silky Locoweed or White Locoweed (ok-SEE-troh-pus: ser-ee-KEE-uh) Fabaceae or Papilionaceae:
This species has white or creamy-yellow flowers and sometime plants with lilac colored flowers are produced (lilac colored plants are most likely hybrids between this species and O. lambertii). It is a herbaceous perennial that grows and flowers in early spring, completes flowering and seed production by early summer, and then goes dormant. Oxytropis sericea grows 4 to 12 inches tall.
Oxytropis sericea is native to much of the western half of North America, were it is considered a weed species in pastures because it is poisonous to cattle and horses. It is found in prairies and mountain meadows, and on open mountain slopes.