Research on Flora of Pteridophyte in Hengshan Mountain

There are 235 species of ferns(including subspecies) in Hengshan Mountain,belonging to 75 genera in 36 families.Analysis on the flora showed that: the ferns not only have strong tropical nature,but also show the obvious transitional characteristics from tropical to temperate.Most of families and genera in this flora are subtropical flora and tropical flora,while the main of species' flora is temperate flora.It includes 18 families,38 genera and 69 species in tropical flora and subtropical flora,respectively occupying to 50.00%,50.67% and 29.36% of the total families,genera and species.Among them,there are 14 families,21 genera and 5 species in pan-tropical flora and 3 families,18 genera and 158 species in temperate flora,accounting for 38.89%,28%,2.13% and 8.33%,24%,67.23% of the total families、genera and species respectively.What is said above shows that the most important flora of families and genera is pan-tropical flora,and temperate flora is the dominant flora of species,which explain tropical flora and temperate flora is intersecting and compatible.There are not endemic genera but 1 endemic species in the flora,and endemic species of China are very plentiful with 46 species and 19.57% of the total species.The flora contact with neighborhood nearly,and their geographical components are East China components predominantly.Hengshan Mountain is similar to Wuyishan and Lushan in plant flora,but farther to Wanfushan.