Abstract: Xilongshan is a large montain in N 22°26' - 22°46', E 102°32' - 103°04'. It covers an area about 1 000 km2 and is shared by China, Vietnam and Laos. The Chinese part with an area of 178 km2 and a related altitude about 2 500 m is located at WS Jinping of Yunnan province. In the precent paper, the vegetation of the Chinese part were reported for the first time and especially discussed the community com-position of Monlane mossy eveiygreen broad-leaf forest and Summit mossy dwarf forest in details. In the two types of vegetation, the dominajite species were represented by Rhodokia spp. (Mamamelidaceae) and Rhdodendron spp. (Ericaceae) respectively. The companions imply that the two kinds of Mossy forests are related in some way to those existed in NW Yunnan.

Key words: The Xilongshan mountain