Findings of Aquatic Vascular Plants on the Sakhalin Island

For the first time for the Southwestern geobotanical district of Sakhalin (a separate subzone of dark coniferous forests with an admixture of broad-leaved species; it corresponds to Krillon floristic district), a number of new aquatic vascular plant species (Lemna turionifera, Myriophyllum verticillatum, Potamogeton gramineus, P. manchuriensis, Stuckenia pectinata, Utricularia minor, and U. × ochroleuca) has been listed. There is also a novelty for the South Sakhalin lowland geobotanical district (Myriophyllum spicatum). All these taxa are known from other geobotanical districts of Sakhalin. The additions to the list of flora of the southwestern district, which is well surveyed by botanists, indicate not floristic uniqueness of the subzone of dark coniferous forests with an admixture of broad-leaved species, but rather a poor knowledge of the Sakhalin aquatic flora.