STUDY ON COMMUNITIES OF AQUATIC VASCULAR PLANTS IN LUDING AND KANGDING COUNTIES, SICHUAN PROVINCE

Luding and Kangding Counties, 29°10′～30°50′N, 101°10′～102°30′E, are located in the eastern margin region of Qinghai-Xizang Plateau. 7 aquatic plant communites distribut in the area, that are Co. Eleocharis valliculosa-E. yokoscensis, Co.Catabrosa aquatica-Trapa bispinosa, Co. Potamogeton natans, Co. Patamogeton filiformis, Co. Myriophyllum spicatum potamogeton pusillus, Co. Batrachium bungei var, flavidum-Potamogeton obtusifolius, Co. Polygonum minus Huds.f. trigonocarpum. Above communities contain 36 species of aquatic vascular plants. North Temperate communities are main community in the area.