南京紫金山国家森林公园蕨类植物资源调查及区系分析

Investigation and floristic analysis of pteridophyte in Zijin Mountain National Forest Park in Nanjing

在野外调查及查阅资料的基础上,对紫金山国家森林公园的蕨类植物资源进行区系分析,结果表明:该区有蕨类植物25科36属79种(包括2变种),优势科为鳞毛蕨科、金星蕨科、蹄盖蕨科,优势属为鳞毛蕨属、铁角蕨属、肿足蕨属、复叶耳蕨属、耳蕨属,优势种有井栏边草、贯众、渐尖毛蕨、黑足鳞毛蕨、阔鳞鳞毛蕨。世界分布类型有11科12属,热带分布类型有13科18属,温带分布型有1科5属,中国特有分布1属1种。紫金山蕨类植物区系具有明显的热带亲缘性,与安徽的板桥、浙江的龙王山有较大的亲缘关系。在中国蕨类植物区系分区上,紫金山属于东亚区的华东-华中植物地区。紫金山蕨类植物区系是江苏蕨类植物区系的代表区系,具有重要的科研价值。普通凤丫蕨(Coniogramme intermedia)和中华蹄盖蕨(Athyrium sinense)为江苏分布新记录。

Based on the field investigation and reference collection,the floristic analysis of pteridophyte in Zijin Mountain National Forest Park was conducted. The results indicate that there are 79 species （including 2 varieties） belonging to 36 genera in 25 families in Zijin Mountain. The dominant families include Dryopteridaceae,Thelypteridaceae,Athyriaceae. The dominant genera are Dryopteris,Asplenium,Hypodematium,Arachniodes,Polystichum. The dominant species are Pteris multifida,Cyclosorus acuminatus,Dryopteris fuscipes,Dryopteris championii. For the pteridophyte of Zijin Mountain,eleven families including 12 genera belong to the cosmopolitan area type; thirteen families including 18 genera belong to the tropical areal type; one family including five genera are the temperate areal type. Only one specie uniquely distributes in China. The pteridophyte of Zijin Mountain shows significant relation to tropical type,and it is close to that of Banqiao and Longwang Mountain. Zijin Mountain locates in the central and east China region. The pteridophyte of Zijin Mountain is a typical flora in Jiangsu province which is valuable to scientific study. In this study,Coniogramme intermedia and Athyrium sinense are found to be new species in Jiangsu.