浙西南山地蕨类植物区系研究

Study on the pteridoflora in Southwest of Zhejiang Province

关键词:  蕨类植物  区系  浙西南

Key words:  Pteridophyte  flora  Southwest Zhejiang

摘要:

浙西南山地蕨类植物十分丰富,区系有46科99属396种(含变种及变型)组成。优势科是鳞毛蕨科、水龙骨科、蹄盖蕨科、金星蕨科等; 优势属是鳞毛蕨属、复叶耳蕨属、铁角蕨属、卷柏属、毛蕨属等。区系地理成分复杂,具有亚热带性质,但兼有亚热带向暖温带过渡的特征; 区系起源古老,不乏古老的科、属及孑遗种; 区系具有丰富的中国特有成分; 该区系与邻近地区蕨类植物区系关系的密切程度依次为西南、华南、日本、华中、台湾、华北、西北、西藏和东北。

Abstract:

The pteridoflora in Southwest Zhejiang Province are composed of 396 species(including all kinds of varieties),99 genera,46 families. The representative families are Dryopteridaceae, Polypodiaceae,Athyriaceaea and Thelypteridaceae. The main genera are Dryopteris,Arachniodes,Asplenium,Selaginella and Cyclosorus. The flora elements from varieties of geographical types are complicated. This pteridoflora is not only subtropical in nature,but with some temperate elements. This pteridoflora origin can be traced back to ancient times,many of whose families,genera and relic species are ancient ones. This pteridoflora is rich in species which are endemic to Southwest China. This area is closer to its adjacent area,the sequence of pteridophytas floristic relation between Southwest Zhejiang and adjacent regions can be Southwest China,South China,Japan,Central China,Taiwan,North China,Northwest China,Tibet,Northeast China.