A Preliminary Investigation of Pteridoflora in Fodingshan Nature Reserve of Guizhou Province

The floristic composition and geographic feature of pteridophyte in Fodingshan Nature Reserve were analyzed based on field investigation and data collection.A total of 27 families,61genera and 161species(containing the taxonomic unit below the species) of pteridophyte in Fodingshan Nature Reserve were observed,most of which were Dryopteridaceae,Polypodiaceae or Aspleniaceae.Type of pteridoflora was complicated.In this area,the pteridophyte accounted for 70.2% of the total species,and the temperate species were overwhelming.Among them,110 species were the East Asia species,accounting for 68.35% of the total,which reflected that the pteridophyte in Fodingshan Nature Reserve belonged to the East-Asia distribution.The tropic distribution species were 23.6%,indicating that pteridophyte in this area had close relationship with tropic distribution.Same as the most areas in Guizhou province,Fodingshan Nature Reserve located in transition section,a large part of genera contained only one species,suggesting that the pteridophyte in this area had transitivity.