1531 Polemonium acutiflorum Willd.

Syn.: P. campanulatum (Th. Fr.) Lindm.

This mainly arctic-montane species occurs in Eurasia and northwestern N. America. It includes here some other taxa in Asia, taken a s species by Vassiljev (cf. Hultén, Circumpol. II, p. 82, 336 f. and map 73). In western N. America the closely related P. occidentale Greene (syn.: P. caeruleum subsp. occidentale [Greene] Davids.) occurs. Its var. lacustre (Wherry) Lakela is locally distinguished in N. U.S.A. Cf. also Meusel et al. 1978, map p. 360.