浙江建德蕨类植物区系研究

Study on Pteridophyte Flora in Jiande

依据2008-2016年野外线路调查数据以及相关文献资料,运用植物区系地理学方法,对建德市的蕨类植物进行区系组成和分布区类型的分析,并将其与周边地区和省区的植物区系进行比较。结果表明:(1)建德市现有蕨类植物34科60属103种(含变种和变型),优势科为鳞毛蕨科Dryopteridaceae,水龙骨科Polypodiaceae;优势属为鳞毛蕨属Dryopteris;(2)根据现代地理分布并参照吴征镒对中国种子植物属的分布区类型的划分,建德市蕨类植物科的分布区类型有5个类型,属的分布区类型有8个类型,均以世界分布和泛热带分布占优势,表明建德市蕨类植物的热带起源;(3)科、属特有现象不明显,中国特有种占较高比例,石灰岩地区分布的种类比较特殊,并发育了地区特有种;(4)地史、化石证据表明,建德市蕨类植物区系起源古老,联系广泛,特别是与印度、中南半岛、日本等地联系十分紧密。

During 2008 and 2016, field investigations were carried out on Pteridophyte in Jiande, Zhejiang province by route survey. Analysis was made on floral composition and areal by floristic geography, and its difference in neighboring area and partial provinces. The result demonstrated that there were 103 species of pteridophyte(including varieties and forms) belonging to 60 genera and 34 families in Jiande. The dominant families were Dryopteridaceae and Polypodiaceae, and the dominant genus was Dryopteris. There were 5 areal types in the family level and 8 types in the genera level, both family and genera was dominated by cosmopolitan and pantropical distribution. There was no endemic family or genera of China, but there was a high proportion of endemic species of China. The species distributed at limestone area was special, and there were some endemic species. The geological and fossil showed that pteridoflora in Jiande had ancient origin and widely associated, especially closely with India, Indo-China Peninsula and Japan.