太白山自然保护区蕨类植物区系分析

目的分析陕西太白山蕨类植物区系组成和分布类型。方法野外调查和对已有资料的整理。结果太白山有蕨类植物21科40属110种,其中蹄盖蕨科、水龙骨科、鳞毛蕨科为优势科;卷柏属、耳蕨属、鳞毛蕨属、铁线蕨属、瓦韦属等为优势属。结论区系属中仅一种的类群多,起源古老,科属结构较简单,科的分布类型以世界分布为主,并与温带区系有着较强的联系;属的分布以温带成分为主,同时也表现出热带、亚热带向温带过渡的特性;种的分布以中国特有分布为主,温带分布次之。区系特征与其古老的地质和优越的水热条件密切相关。

Floristic analysis of pteridophyte in Taibaishan Nature Reserve

Aim To study the composition and distribution types of Pteridophytes in Taibaishan Nature Reserve.Methods Based on the known data and on-the-spot investigation.Results There are about 110 species(including varieties and forma) Pteridophytes belonging to 40 genera and 21 families.The representative families are Athyriaceae,Polypodiaceae and Dryopteridaceae.The main genera are Selaginella,Polystichum,Dryopteris,Adiantum,Lepisorum.Conclusion The result shows that:rich in single species in one genus,ancient in origin,simple in structure of families and genera,the top families distribution types are cosmopolitan and have strong relation with temperate zone;the main genera types are temperate,with it indicating that tropics and subtropics transition to temperate area-type;the dominating species types are endemic to China,temperate area-type takes second place.These characters are nearly correlative with the ancient geologic structure and superior hydrothermal condition here.