武功山地区蕨类植物区系研究

Study on the Pteridophyte Flora in Wugong Mountain

通过野外实地调查和查阅相关文献,分析武功山地区蕨类植物区系组成。结果表明:1武功山地区共有蕨类植物38科84属257种,鳞毛蕨科、水龙骨科、金星蕨科、蹄盖蕨科组成武功山的优势科,占武功山地区总属数42.9%、总种数的51.0%,鳞毛蕨属、铁角蕨属、耳蕨属、卷柏属组成了武功山地区的优势属,占总种数的26.5%;单种属、少种属较多,显示生境的特殊性,抑制了属种分化;本区属中国-日本区系的组成部分。2属的地理成分以热带成分为主,占总属数的80.9%(扣除非世界分布),显示明显的热带亲缘;种的地理成分以温带成分占优势,占总种数的61.4%(扣除非世界分布),表明本区系从温带向热带过度的趋势。

Through field investigation and reference related literature in Wugong mountain, comparatively intensive analysis on the characteristics of Pteridophyte floras, two main conclusions were as followed ： （1）257 species of 84 genera in38 families were found in the area, and the dominant families were Dryopteridaceae, Polypodiaceae, Athyriaceae, Selaginella, etc, the main genera （26. 5% ） were Dryopteris, Athyrium, Asplenium, etc; nevertheless, no monotypicbut rich in rare-species genera, which showed the specificity of the area＇ s habitats or some other possibilities, that inhibit the differentiation of genus; the area is the part of the flora of Sino-Japan. （2）the analysis of geographic compositions of genus, showed the dominant of tropical elements （80. 9% ）, which indicated the close connection to the tropic, but on species, the temperate geographical elements （61. 4% ） were dominant, and show the trend of the transition from temperate to tropical.