Gayophytum genus --- Evening-Primrose family

spreading groundsmoke (Gayophytum diffusum) -- in July -- Cub Lake Trail, Rocky Mountain National Park, CO white & cream  

spreading groundsmoke (Gayophytum diffusum) -- in June -- Steens Mountain Wilderness Area, OR     

pinyon groundsmoke (Gayophytum ramosissimum) -- in July -- Wild Basin, Rocky Mountain National Park, CO     ​white & cream