Sofronova E.V.1, Potemkin A.D.2 2000. To the liverwort flora of Yakutia, East Siberia: species interesting and little-known for Russia // Arctoa. Vol. 9: 133–140 [in Russian].

1 Institute of Biology of Permafrost-Zone, Lenina str. 41, Yakutsk 677000 Russia

2 Komarov Botanical Institute, Prof. Popov str., 2, St. Petersburg, 197376 Russia

KEYWORDS: hepatics, Yakutia, new records, phytogeography.

ABSTRACT. Nine little-known for Russia species (Anastrophyllum cavifolium, Barbilophozia hyperborea, Calycularia laxa, Cephaloziella elachista, Cryptocolea imbricata, Jamesoniella undulifolia, Scapania microdonta, S. sphaerifera, Tritomaria heterophylla) are characterized with respect to their ecological behavior, reproduction, and geographical distribution. Three of them (Cephaloziella elachista, Scapania microdonta, S. sphaerifera) are recorded for the first time for Yakutia. Listed localities of Anastrophyllum cavifolium, Cryptocolea imbricata are southernmost for Russia, of Tritomaria heterophylla is southernmost in the World, of Scapaniamicrodonta is northernmost in the World and of Barbilophozia hyperborea the first finding in Russia outside the Arctic zone. Diagnostic characters of the most considered species are discussed and illustrated.

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