Sanicula bipinnatifida
 Sanicula bipinnatifida is a species of flowering plant in the parsley family known by the common names purple sanicle purple blacksnakeroot and shoe buttons. It is native to the west coast of North America from British Columbia to Baja California where it can be found in many types of habitat including grassland woodlands and mountain slopes of serpentine soils. It is a perennial herb growing to a maximum height near 60 centimeters from a taproot.