1217 Lathyrus palustris L.

This polymorphic species is widely distributed in Eurasia and N. America. It is here represented by subsp. palustris in Europe and W. and C. Asia merging into subsp. pilosus (Cham.) Hult. in Asia and N. America, and var. myrtifolius (Muhl.) Gray in N. America. The species s. lat. belongs to the circumpolar plants (Hultén, Circumpol. II, p. 162 and map 153). Cf. also Meusel et al. 1965, map p. 252.