Euptelea pleiospermum Community Characteristic of Dafang Karst Area in Guizhou,Southwest China

Based on the phytocoenological method,the Euptelea pleiospermum community of Dafang Fokienia hodginsis National Reserve in Karst area in Guizhou Province was researched.The results are showed as follows:There are various plants in the community of Euptelea pleiospermum.Its family and genus are scattered composition.The geographical element is complicated,with a relatively higher connection to the tropical element on family level by 45.28% and a relatively higher connection to the temperate element on genus level by 39.44%.It was characterized by phanerophyte with mesophylls and microphylls,simple,herbaceous,coriaceous,unentire leaves.The vertical structure of community can be divided into tree layer,shrub layer and herb layer as well as a definite number of interstratum plants.The Shannon-Wiener indexes of tree layer,shrub layer and herb layer are 2.5561,2.6954 and 1.9145,respectively.