Abstract: There are 1 421 species of seed plants,belonging to 696 genera and 158 families in this flora of Cerasus cerasoides.Analysis of the floristic elements based on species,genera and families shows that the tropical elements are dominant in the flora including 74.42% family of all family(excluding cosmopolitan,the same as following),76.08% tropcial genera of all genera,66.31% tropical speciea of all species.Therefore the floristic characteristics is obviously tropical.Besides,the flora has closely relationship with Pantropic and Tropical Asia elements as well as Trop.Australasia,Trop.Africa,Trop.America,North Temperate and East Asia.However,there are little relationship with Mediterranea,West Asia and Centra Asia.The endemic taxa are not very obvious,and the rate of the endemic families,genera or species is lower than that of central Yunnan Plateau as well as other tropical of Yunnan where are adjacent regions of different latitude.