Preliminarily Study on the Pteridophytes Flora of Emei Mountain

This paper preliminarily investigated the floristic geographical features of the ferns in Emei Mountain.The results are as follows:there are 425 species belonging to 110 genera of 46 families,and the dominant families are Athyriaceae,Polypodiaceae and Dryopteridaceae and the dominant genera are Polystichum,Dryopteris,Pteris and Athyrium.The areal-types of family and genera are tropic elements,and the pantropical ones are the main ones.While the areal-types of species are temperate elements,and the Chinese endemic and the eastern Asia are the main ones,they each occupy 36.5% and 32.0%.The results show that floristic geographical composition of the pterisophyte in Emei Mountain is subtropical inwhich temperate takes an important part.They are most closely related to Dabashan Mountain,and related to Mt.Ailaoshan to a certain extent,while have a distant relation to Qinling Mountain,Tibet,Tianhuashan Natural Reserve of Shaanxi Province.