1037 Chrysosplenium alternifolium L.

This polymorphic species is widely distributed in Eurasia and partly N. America. In addition to subsp. alternifolium in Europe and W. Siberia some lower taxa are distinguished, above all subsp. tetrandrum (Lund) Hult., an arctic-alpine, circumpolar plant (Hultén, Circumpol. Il, p. 92 and map 83), which is presented on a separate map, no. 1038. Further, subsp. sibiricum (Ser.) Hult. in a large area in C. Siberia and E. Asia, subsp. japonicum (Maxim.) Hult. in Japan and subsp. iowense (Rydb.) Hult., with a probably disjunct distribution in N. America, are mapped. Cf. also Meusel et al. 1965, map p. 206.