湖南蓝山森林公园蕨类植物区系研究

Studies on the Pteridophyte Flora of Hunan Lanshan Forest Park

对湖南蓝山森林公园蕨类植物区系的研究表明:1)蓝山森林公园有蕨类植物139种(含变种和变型),隶属于28个科、59属.该区域科、属、种分别占中国蕨类植物的44.44%,25.54%,5.35%;湖南蕨类植物的52.83%,39.60%,19.36%;2)科属的统计分析表明,蓝山森林公园的优势科为鳞毛蕨科(Dryopteridaceae)、金星蕨科(Thelypteridaceae)、水龙骨科(Polypodiaceae)、蹄盖蕨科(Athyriaceae);优势属为鳞毛蕨属(Dryopteris)、蹄盖蕨属(Athyrium)、卷柏属(Selaginella)、凤尾蕨属(Pteris);3)属、种的地理成分分析综合表明该区是亚热带性质;4)在地区间比较中,得出该区归属于华中-华东大区,与西南、华南蕨类区系较易区别开来;在相似性系数比较中该区与西南地区相似性高于华南地区.

The result on Pteridophyte flora on Hunan Lanshan forest park shows that： 1） Ferns on Lanshan forest park have 28 families,59 genera and 139 species（including varieties and variants）.In this area,family,genera and species of fern in China accounted for 44.44%,25.54%,5.35%;Accounted for 52.83%,39.60%,19.36% of Hunan fern;2）The statistics analysis of families and genera shows that the dominant families on Lanshan forest park are Dryopteridaceae,Thelypteridaceae,Polypodiaceae,Athyri-aceae and the major genera is Dryopteris,Athyrium,Selaginella,Pteris;3） Analysis of geographical ele-ments of genera and species shows that the character of this area is subtropical;4）In the regional compari-son,the area belongs to central China-east China region,and easy to distinguish with the southwest and south fern flora.In this area,the similarity coefficient with southwest is higher than in the south China.