407 Trichophorum pumilum (Vahl) Schinz & Thell.

Syn.: Scirpus pumilus Vahl

This mainly boreal-montane species has a disjunct distribution in Eurasia and N. America. The N. American population has been distinguished as a separate taxon, Scirpus rollandii Fem. or T. rollandii (Fem.) Hult. (Hultén, Amphi-atl., p. 246). An isolated occurrence in Szechwan is distinguished as subsp. distigmaticum Kuk. T. pumilum is reported among the amphi-atlantic plants (Hultén, 1. cit. and map 227), although the species s. lat. shows a tendency towards circumpolar distribution.