神农架蕨类植物生态分布规律研究

对鄂西神农架蕨类植物进行的专题研究的结果表明：本区蕨类植物垂直分布带谱明显，与云南玉龙山相似；生态类型较多；种类丰富，起源较古老，但次生成分突出；地民分复杂，相互交错，但以亚热带成分为主，温 成分也有不容忽视的比重，还有一定数量的势带成分参与其中，这表明成分具有多样发生 并具有热带新缘性；鳞毛蕨科、水龙骨科、１蹄盖蕨科属种优势明显，三科种类占其总种数的高比例炒本地区蕨科、水龙骨科、蹄盖蕨科属种优势

Study on Ecologic Distibution of Pteridophytes in Shennongjia

This is only a prelimiary research of ecologic distribution of the pteridophytes in Shennongjia Mountains in Western hubei Province for the first time. The results are as follows; This region is very abundant in pteridophytes. The flora which originated anciently has a large number of new-born elements, and the phytogeographic Comjponents are complex and inter-located, but major the subtropical elements, as well as a lot of temperate ones joined. And this shows that the ferns flora is diversity in composition and tropic-relative.Dryopteri aceae, Polyodiaceae and Athyriaceae are dominant and have a large number of genera and spcies in this fern flora, the high proportion of species can stand for the important feature of the fern flora. This flora is a tie of fern between Sino-Himalayas and Sino-Japan, and also the transition region from subtropical elements to temperate ones, the convergence of distribution and the center or sub-center of transfer.