浙江九龙山自然保护区蕨类植物区系的研究

在野外调查和分类处理的基础上，对九龙山自然保护区蕨类植物区系进行了研究。九龙山保护区蕨类植物区系由35科74属222种(含变种)组成，主要的科是鳞毛蕨科、水龙骨科、蹄盖蕨科、金星蕨科和铁角蕨科，它们包含的种数占总种数的64．41％；主要的属为鳞毛蕨属、铁角蕨属、复叶耳蕨属、卷柏属和瓦韦属。区系地理成分复杂，属的分布类型以热带亚热带性质为主，种的地理成分以东亚分布和中国特有分布最为突出，共占79．73％，表现出热带向暖温带过渡的特点。与邻近6个山地比较，与九龙山蕨类植物区系亲缘关系最近的是浙江凤阳山。九龙山有80种中国特有分布蕨类植物。

Study on the pteridoflora of Jiulongshan Nature Reserve in Zhejiang Province

Based on investigation and statistical analyses, the flora of pteridophyta of Jiulongshan Nature Reserve was studied in the present paper. There are 222 species of 74 genera of pteridophyees belonging to 35 families in Jiulongshan Nature Reserve. The dominantfamilies are Dryopteridaceae,Pol-ypodiaceae,Athyriaceae,Thelypteridaceae and Aspleniaceae. These five families account for 64. 41%. The dominant genera are Dryopteris,Asplenium,Arachniodes,Selaginglla and Lepisorus. Floristic and geographic elements in Jiulongshan Nature Reserve are complicated. At genus and species levels, tropical-subtropical distribution types are dominant. The east Asia and endemic Chinese element takes the largest proportion, accounting for 79. 73%, and represented the feature of tropical transition to warm-temperated area-type. In the 6 other mountains,the genetic and species relationship of Jiulongshan Nature Reservation ferns are intimate to Fengyangshan Reservation. There are 80 species endemic to China in Jiulongshan Nature Reservation.