[burkeherbarium.org] Range, Habitat, Pollination: Distribution: Occurring chiefly west of the Cascades crest in Washington, also in the Blue Mountains of southeast Washington; British Columbia to northeast Oregon, east across Canada to the Atlantic Coast. Habitat: Damp woods and swampy areas from the lowlands to middle elevations in the mountains. Flowers: March-July Pollination: Bees, flies, beetles, wasps (link added by Mary Ann Machi)