Study on Pteridophyte Flora in Southeast Prefecture of Guizhou Province

Through specimen collection,identification and data query,6 floristic features have been found:(1) The species is quite rich,414 species in 48 families and 109 genera,with the 5 dominant families(Dryopteridaceae,Athyriaceae,Polypodiaceae,Thelypteridaceae and Aspleniaceae) and 5 dominant genera(Asplenium,Dryopteris,Athyrium,Polystichum and Selaginella);(2) Both the families and the genera have the floristic character of tropics and subtropics;(3) Endemic genera and species are rather obvious;(4) East Asia geographical components take the largest proportion.(5) Species are rare within genera,showing its flora characterized by the transition;(6) materials are rich and species comprehensive coefficient is high as compared with adjacent areas.