abstract: A new class, Carici arctisibiricae-Hylocomietea alaskani class nov. is described for ve ge tation of the tundra zone on a circumpolar scale.This higher unit in the sys tem of Braun-Blanquet floristic (= floristic-sociological) classification unites the zonal vegetation in the intermediate habitats with respect to the substrate moisture, pH and texture, the snow cover thickness and duration, the depth of seasonal frozen ground thawing, and the growing season length on the interfluves (upland surf
journal: Botanica Pacifica