Studies on the pteridoflora of Matoushan Mountain of Zixi County,Jiangxi Province

There are 142 species of pteridophytes 62 genera belonging to 30 families in Matoushan Mountain. Floristic and geographic elements in Matoushan are complicated. At family and genus level,tropical-subtropical distribution types are dominant. The dominant families are Dryopteridaceae with 25 species,Polypodiaceae with 18 species,Thelypteridaceae with 15 species,Selaginellaceae with 11 species,and Athyriaceae with 11 species,these five families comprise about 56.34% of the total pteridophyte flora. The dominant genera are Dryopteris with 16 species,Selaginella with 11 species,Pteris with 8 species,Asplenium with 8 species,Arachniodes with 5 species,and Phymatopteris with 4 species. These six genera comprise about 36.62% of the total pteridophyte flora. The geographical distribution of the genera of pteridophytes in Matoushan Mountain can be grouped into 8 types. Pantropic with 19 genera. Tropica Asia with 7 genera and Cosmopolitan with 19 genera are the dominant types,constituting about 72.58% of the total genera. While at the species level,subtropical montane species are the dominant. East Asia element takes the largest proportion,including Endemic Chinese elements,accounting for 66.21% of the total species. Phymatopteris digitata was found first in Jiangxi Province.