The result on Lycophytes and Ferns flora in Hunan Jiuyishan Nature Reserve shows that: 1.Lycophytes and Ferns in Jiuyishan Nature Reserve have 23 families,71 genera and 168 species(including infrataxa).In this area, respectively, family, genera and species of Lycophytes and Ferns accounted for 60.53% 、40.11% 、7.46% of that in China;accounted for 63.89% 、66.36% 、25.93% of that in Hunan.2.The statistic analysis of families and genera shows that the dominant families in Jiuyishan Nature Reserve are Dryopteridaceae, Polypodiaceae, Pteridace...