Abstract:

The supplementary investigation and statistical analysis of pteridophytes in Jiulianshan Nature Reserve were conducted. There were 265 species of pteridophytes (including subspecies grade) belonging to 93 Genera and 43 families. The species composition was rich, and the richness index was the 2nd among the 8 forest ecotype nature reserves in Jiangxi Province. The dominant families and genera of pteridophytes were obvious. Dominant families consisted of Dryopteridaceae, Polypodiaceae, Athyriaceae, Thelypteridaceae. Dominant genera consisted of Dryopteris, Pteris, Selaginella, Asplenium. The flora of families and genera was dominated by the tropical elements, accounting for 55.81% and 69.89% of the total families and genera, respectively. The geographical composition of the species was dominated by the East Asian elements (47.9%), followed by the tropical elements (34.9%). The R/T value showed that the flora of pteridophytes to Jiulianshan was located in the transitional zone between the south subtropical zone and the middle subtropical zone. Cluster analysis showed that it was most closely related to Matoushan Nature Reserve and Qiyunshan Nature Reserve, and it belonged to east China in the pteridophytes geographical division

Key words: pteridophytes, resource composition and flora, Jiulianshan Nature Reserve, Jiangxi Province