The pteridophyte in Dayaoshan National Nature Reserve of Guangxi Province are composed of 227 species (including variation and varieties), 86 genera, 40 families. The composition characteristics and geographical composition of pteridophyte flora in Dayaoshan National Nature Reserve were summarized. The results showed that the dominant families of the flora were Polypodiaceae and Dryopteridaceae. The dominant genera were Asplenium, Pteris and Dryopteris. The number of species was very indigent in families and genera. The geographical composition of the flora were complicated, with 11 flora elements in genera. This pteridophyte flora was not only subtropical in nature, but also some tropical elements. The flora was much more close to Hainan and Xishuangbanna than Sichuan and Guizhou.%大瑶山自然保护区蕨类植物十分丰富,区系由40科86属227种(含变种和变型)组成.总结了大瑶山国家级自然保护区蕨类植物区系的组成特点和地理成分组成特点,结果表明,该区系优势科是水龙骨科(Polypodiaceae)和鳞毛蕨科(Dryopteridaceae)等;优势属是铁角蕨属(Asplenium)、凤尾蕨属(Pteris)和鳞毛蕨属(Dryopteris)等.科内、属内种类贫乏;区系地理成分复杂,属的地理成分有11个类型,具有亚热带性质,但兼有由亚热带向热带过渡的特征.该区系与海南和西双版纳区系较接近,而与四川和贵州相差较大.
展开▼
