An attempt of the floristic division of the kolyma-anadyr watershed (chukotka)

摘要

Relatively extended part of the boundary between two floristic regions, the Arctic and Boreal ones, is located on the watershed of two biggest rivers in the north-east of Asia, the Kolyma and the Anadyr. Detailed study of local and regional floras within the watershed area including upper reaches of such rivers as the Big (Bolshoi) and the Little (Malyi) Anyui, the Little (Malyi) Peledon and the Middle (Srednii) Kaemraveem was carried out. These investigations showed that floristic complexes of the area studied belong to the type of hypoarctic floras, and the territory itself should be referred to as a separate Upper-Peledon district within the Eastern-Anyui circuit (okrug) of Chukotka province of the Arctic floristic region. According to this conclusion, the border line between the Arctic and the Boreal floristic regions is defined more precisely.