浙江磐安蕨类植物区系的研究

Studies on the pteridoflora of Pan′an region in Zhejiang Province

在野外调查和已有资料整理的基础上,分析了浙江磐安蕨类植物区系组成和分布区类型,并与国内其他8个地区的蕨类植物区系进行了比较分析.现知磐安有蕨类植物34科60属112种(包括各种变种和变型),优势科为鳞毛蕨科、水龙骨科、金星蕨科、蹄盖蕨科,优势属为鳞毛蕨属、卷柏属、铁角蕨属、复叶耳蕨属.科的分布类型以世界分布和泛热带分布为主;属的分布以泛热带分布为主,同时也表现出一定的暖温带性质,无特有属;种的分布以东亚类型为主,特别是中国 日本分布类型最多,亚热带至暖温带性质显著,表明该区应置于中国 日本森林植物亚区从暖温带向亚热带过渡的范围内.磐安的蕨类植物丰富程度不大,区系与天目山、庐山、黄山、金华北山等区系关系最密切,可以归入同一自然区,而与太白山、长白山等区系关系较为疏远.

Based on the known data and on-the-spot investigation,the composition and distribution types of pteridoflora in Pan′an,Zhejiang were analyzed and compared to other 8 regions.The pteridophytic flora in Pan′an,Zhejiang Province were then reported to be composed of 112 species(including of varieties),60 genera,34 families.The representative families are Dryopteridaceae,Polypodiaceae,Thelypteridaceae and Athyriaceae.The main genera were Dryopteris,Selaginella,Asplenium and Arachniodes.The top families′ distribution types were cosmopolitan and pantropic ones;the main genera were pantropical ones,while the species distributin type belongs to the east Asia type and represents the feathure of subtropics transition to warm temperated area-type.Based on the analysis of geographic compositions of genera and species,the results showed that the region is a part of the center of East-Asian elements(especially China -Japan element).In the 9 reservations,the Pan′an flora is much more closely allied to Tianmu Mt.,Lu Mt.,Huang Mt. and Jinhua Bei Mt. than to the others,so they should be the same natural flora.