Analysis of pteridophyte flora of Dabashan Nature Reserve
The flora of pteridophyte in Dabashan Nature Reserve was investigated and analyzed.The results are as follows:(1)The pteridophytes species is rich in this Nature Reserve,with 339 species of pteridophytes of 92 genera in 38 families.(2)Results of statitstic analysis reveal that,in this flora,the dominant families consist of Polypodiaceae,Athyriaceae,Dryopteridaceae and Thelypteridaceae;the dominant genera consist of Lepisorus,Asplenium,Dryopteris and Phymatopsis.(3) The areal-types of family are 8,in which,the pantropical ones and North temperate ones are the main ones,and each of them occupy 53.84% and 19.23%,respectively.(4)There are 13 areal-types of genera with compound floristic elements,among them,the pantropic and tropical-Asia ones which belong to the tropical type are the main ones,occupy 62.49% of the total,the temperate ones whose key elements are the North temperate and Eastern-Asia ones occupy 32.96%.In terms of the floristic zone,the fiora in Dabashan Natrue Reserve is a transitional type between the Middle-China and South-China areas.(5)The flora shows a close relation with those of Shenlongjia,Wolong,Yunshan and Fanjingshan and farther relation with those of Qinling,Shiwandashan,Xishuangbanna and Chebaling.