Fern flora in Dashanfeng Mountain of Zhejiang Province

It is shown by field survey and data analysis that Dashanfeng Mountain has 98 species and 2 variants,58 genera and 33 families of ferns.Its dominant families are Dryopteridaceae,Polypodiaceae and Athyriaceae,and its dominant genera are Dryopteris,Selaginella and Arachniodes.The analysis of its flora composition,nature and characteristics indicates that it is complex and diverse in its geographical elements and its areal types are mainly pantropic and East Asia ones,and present the transitional characteristics from subtropical areal to warm temperate areal;the composite index of its florae is-0.290 and ranks the sixth among those of the eight mountainous florae under comparison;its florae are closely associated with those in Tianmushan Mountian;Sanqingshan Mountain and Wuyishan Mountain,and thus can be classified into the same natural flora category as them;but they are distant from those in Maoershan Mountain.