[Wikipedia] Range, Habitat, Associates: It is native to western North America from Alberta and British Columbia to California to Montana, where it usually grows in shady, damp areas, such as forest understory. Additional populations have been found in the Black Hills of Wyoming and South Dakota as well as in the Porcupine Mountains in Michigan.[1][4] A typical west coast habitat is in forest floors of California oak woodlands, where common understory flora associates may include Coastal woodfern, Dryopteris arguta; Maidenhair fern, Adiantum jordanii and False Solomon's seal, Maianthemum racemosum. (link added by Mary Ann Machi)