588 Corallorhiza trifida Chät.

This boreal-montane species occurs on wet and peaty soil from Europe through Siberia and N. America. Within the hatched areas it is partly infrequent or lacking. It belongs to the circumpolar plants (Hultén, Circumpol. I, p. 110 and map 102). Cf. also Meusel et al. 1965, map p. 112.