Abstract: The Lake Luguhu is locatedon the border between Northwest Sichuan Sheng and Sourth Yunnan Sheng,at long 100°50′E.by lat.27°40′N and at altitude of 2685 m.It's a beautiful alpine lake with many small islands,Maximum depth of lake in 73.2m.The transparency of water is up to 4.5m.There are abundant aquatic plants here,vegetation varies from one part to another because of differences in environment such as soil cover depth and transparensy of water.Acording to the dominant species and life-form of plants we recognized vegetation types as follows.

Key words: Lake Luguhu-expedition-geobotoanical

摘要： 泸沽湖位于云南西北部和四川西南部的交界处，北纬27度东经100度50分，海拔2685米，最大水深73.2米，透明度达4.5米; 这是一个美丽的高山湖泊，湖内有许多小岛和茂密的水生植物，其水生植被因生境条件如土质、水深、水体透明度的不同而有所不同，我们主要根据优势种和植物的生活型划分了下列群落类型：1．芦苇群落; 2．茭草群落; 3.水葱群落；4.香蒲群落; 5. 狐尾藻群落；6.红线草群落；7．鸭于草群落；8．波叶海菜花群落;9.亮叶眼子菜群落; 10.丝状绿藻类群群。

关键词: 泸沽湖, 植被, 考察