Konstantinova N.A.1 2000. Distribution paterns of the North Holarctic hepatics // Arctoa. Vol. 9: 29–94 [in Russian].

1 Polar-Alpine Botanical Garden, Kola Sci. Center of Russian Academy of Sciences, Kirovsk-6, Murmansk Province 184256 Russia

KEYWORDS: liverworts, phytogeography, species distribution paterns, arctic, montane, boreal, nemoral, cosmopolits.

ABSTRACT. The distribution paterns of 277 species of north holarctic Hepatics are analyized. The following geographical elements are distinguished on the basis of today known distribution and ecology of species: arctic (44 species), arctomontane (66 species), montane (44 species), arctoborealmontane (52 species), boreal (42 species), nemoral (27 species), and cosmopolits (4 species). The rates of circumpolar and nearly circumpolar hepatics are very low in arctic (6.2% ) and montane (32%) species whereas in arctomontane, arctoborealmontane and boreal elements it exeeds 70%. The disjunctions of great number of hepatics are explained by relict ranges as well as the poorly known distribution and taxonomy of many northern species. Distribution of 96 species are mapped.

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