峨眉山蕨类植物区系的初步研究

依据2004~2006年的野外调查和标本馆标本以及文献资料,初步分析了峨眉山蕨类植物区系的地理特征,结果表明:峨眉山共有蕨类植物46科110属425种,优势科为蹄盖蕨科、水龙骨科和鳞毛蕨科,共192种,占总种数45.2%,优势属为耳蕨属、鳞毛蕨属、凤尾蕨属和蹄盖蕨属等;在科、属的水平上,为热带分布型,以泛热带分布为主,而种的地理分布则以温带分布的中国特有和东亚成分占绝对优势,分别为36.5%和32.0%,揭示了峨眉山蕨类植物区系是以温带性质为主的亚热带类型,具有较强的热带亲缘;与大巴山关系密切,和云南哀牢山有一定的联系,而与秦岭、西藏和陕西天华山的关系较为疏远。

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.