WASHINGTON STATE. Echinacea (Echinacea angustifolia) Root, Pacific Northwest Grown, Cut and Sifted, Certified Organic Common names: Coneflower, Purple Coneflower, Kansas Snakeroot, Narrow-leaf Echinacea, Black Sampson, Rudbeckia Family: Asteraceae (Daisy) Echinacea angustifolia is a perennial flowering herb growing around one to two feet tall, native to parts of southern Canada and the central US states, from the Midwest out to Arizona and Louisiana, mainly in rocky, barren places and dry prairies. It is one of nine related species; the other two that have been used extensively for healing are E. purpurea and E. pallida. E. angustifolia has often been confused or lumped together with E.