Abstract: The Shorea forest, which had been found in western Yunnan, is one of the tropical consociations in China. It distributes in shade-moist gutter below alt. 600m in Jie-Yang valley of Ying-Jiang county about N24°40', E97°34'. The annual mean temperature is more than 22℃ there, and The annual precipitation is over 2800mm.There are some essential characters in this community, such as, the tropical floristic components occupy 94%; the big trees of the upper layer are dominant by the Shorea assamica, which belongs to Dipterocarpaceae, and are mixid by Dipterocarpus pilosus, D.turbinatus, Taraktogeros kurzii Hydrocarpus alpine(Flacourtraceae) and Ficus glomerata var. chittagonga (Moraceae), Saraca griffithiana (Caesalpinaceae ), etc., their highness reach about 40ml the physiognomy appears evergreen; the species of lower layer are various, among them the individual numbers of Arenga pinnata(Palmae) are the most; the lianoid plants are abundant; there are also many plants possessing buttresses, cauliflorys, etc.

Key words: shorea, forest, phytocoenological