Studies on the Pteridoflora of Lishui Ecological Demonstrative Area in Zhejiang Province

Based on investigation and statistical analyses,the Pteridophyte flora of Lishui Ecological Demonstrative Area in Zhejiang Province is studied.Pteridophyte flora is abundant.There are 327 species(including varieties) of 93 genera of Pteridophytes belonging to 43 families.The dominant families are Dryopteridaceae,Polypodiaceae,Athyriaceae,Thelypteridaceae and Aspleniaceae.The dominant genera are Dryopteris,Arachniodes,Asplenium,Athyrium and Selaginella.The flora origin traces back to a very early time,many of whose families,genera and relic species are ancientry,and the flora elements are complicated coming from varieties of geographical types.The geographical distribution has relations with the other parts in the formation in the world.