Abstract
The grassland vegetation which occurs in places of animal colonies or around human settlements in the Central-Siberian sector of the Arctic is referred to 2 new associations, namely Saxifrago cernuae—Alopecuretum alpini and Poo arcticae—Calamagrostietum holmii ass. nov., and also to 2 variants (inops and Astragalus umbellatus var. nov) of the previously described association Saxifrago hirculi—Poetum alpigenae (Zanokha, 1995). The first association is distributed within the whole Taymyr Peninsula and also the part of the polar desert subzone in the Bolshevik Isl. The grass cover is formed by Poa alpigena and Alopecurus alpinus in various combinations of their dominance. The ass. Poo arcticae—Calamagrostietum holmii is distributed only throughout the tundra zone of Taymyr; its grass layer consists of Calamagrostis holmii and Poa arctica. The mentioned variants of ass. Saxifrago hirculi—Poetum alpigenae occur locally in the vicinities of Dixon settlement.
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