Studies on the Pteridophyte Flora of Hunan Lanshan Forest Park

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.