Phytogeographic Notes on Some Aquatic Plants in Yakutia, Eastern Siberia

Abstract

In 1992-1993,botanical surveys of Yakutia in eastern Siberia were carried out. Aquatic plants were collected and new phytogeographic information was added. Utricularia macrorhiza Le Conte was collected from four sites in Yakutia, suggesting that this species is more widely distributed in northeastern Asia. Sparganium natans L. was recorded from eastern Siberia. This evidence fills up the gap in its circumpolar distribution. The present collection of Spirodela polyrhiza (L.) Schleid. is the second formal record from Yakutia, probably the northern limit of this species in Asia.