Заметки о водных сосудистых растениях Якутии по материалам якутских гербариев

Abstract

Critical study of aquatic vascular plants in the Herbaria of Yakutsk (Institute for Biological Problems of Cryolithozone, Siberian Branch of RAS; North-Eastern Federal University) was carried out. Taxonomic composition of the genera Batrachium (DC.) Gray, Callitriche L., Ceratophyllum L., Lemna L., Myriophyllum L., Potamogeton L., Sparganium L., and Utricularia L. in Yakutia were specified as wel as distribution and frequency of their species. Taxonomic problems in some groups were discussed with their decisions proposed. In comparison with new publications on thr flora of the Republic, a number of accepted taxa in Batrachium, Callitriche, Potamogeton, Utricularia was reduced. Circumscriptions and names in Batrachium, Lemna, Potamogeton, Sparganium, Utricularia were changed, mainly due to recognition of characteristic North Asiatic and North Asiatic-North American species instead of widespread Euro-Siberian, Euro-Asiatic and Holarctic taxa. Presence of common Asiatic and North American species shows a considerable Amphipacific relation of the Northeastern Asian aquatic. The northern limits of distribution of the aquatic plants in Yakutia were analyzed, they were shown to occur there up to 71° N, while in Taimyr — above 74°, in Chukotka — up to 67°; that is everywhere approximately 3° southward of marginal points of continental land.