Link to Flora of North American description Distributed from Japan along the Pacific coast through Alaska to Vancouver Island, B.C. Plants may be heterostylous or homostylous. Subspecies saxifragifolia ranges from Eastern Russia through Alaska and to B.C. The subspecies cuneifolia ranges from the Aleutian Islands to Northern Japan. The two subspecies heterodonta and hakusanensis are restricted to Japan. See the related species P. nipponica.