Study on the Pteridophyte Flora in Dayaoshan National Nature Reserve of Guangxi

The pteridophyte in Dayaoshan National Nature Reserve of Guangxi Province are composed of 227 species(including variation and varieties),86 genera,40 families.The composition characteristics and geographical composition of pteridophyte flora in Dayaoshan National Nature Reserve were summarized.The results showed that the dominant families of the flora were Polypodiaceae and Dryopteridaceae.The dominant genera were Asplenium,Pteris and Dryopteris.The number of species was very indigent in families and genera.The geographical composition of the flora were complicated,with 11 flora elements in genera.This pteridophyte flora was not only subtropical in nature,but also some tropical elements.The flora was much more close to Hainan and Xishuangbanna than Sichuan and Guizhou.