167 Luzula wahlenbergii Rupr.

This arctic species has an almost complete circumpolar distribution (Hultén, Circumpol. I, p. 30 and map 24). The pacific-montane population from western N. America to Kamchatka is distinguished as subsp. piperi (Cov.) Hult. (cf. Hultén, Fl. Alaska Neighbor. Terr., p. 297).