1806 Achillea ptarmica L.

This polymorphic species includes several lower taxa occurring in specific areas of Eurasia, viz. subsp. ptarmica in most of Europe, northwards as an introduced and naturalized plant, and, as an adventive, in N. America, subsp. ptarmicifolia (W illd.) Heim. In Caucasus, subsp. cartilaginea (Ledeb.) Heim. (syn.: A. salicifolia Bess.) in E. Europe and Siberia (adventive in Finland; cf. Uotila in Mem. Soc. F. Fl. Fenn. 5 4/1978, p. 21 ff.), subsp. acuminata (Ledeb.) Heim. in E. Asia and subsp. macrocephala (Rupr.) Heim. from Kamtchatka to Honshu.