311 Arctagrostis latifolia (R. Br.) Griseb.

This arctic-montane species has a circumpolar distribution (Hultén, Circumpol. I, p. 18 and map 12). Var. arundinacea (Trin.) Griseb., a somewhat less arctic taxon in northern Siberia and northwestern N. America, is included in this map (for Siberia and N. America see Tolmatchev Fl. Aret. URSS 2/164, map p. 41, and Porsild & Cody 1980, map p. 116, respectively).