[Wikipedia] Common Names, Range, Habitat, Host Plant for Butterfly: Viola ocellata is a species of violet known by the common names pinto violet,[1] two-eyed violet,[2] and western heart's ease.[3] It is native to southern Oregon and northern and central California, where it occurs in the coastal foothills and mountain ranges. It sometimes grows in serpentine soils[4] and in quicksilver mines.[5] The species is a host plant of the butterfly Boloria epithore.[7] (link added by Mary Ann Machi)