Study on Pteridophyte Flora in Jiande

During 2008 and 2016, field investigations were carried out on Pteridophyte in Jiande, Zhejiang province by route survey.Analysis was made on floral composition and areal by floristic geography, and its difference in neighboring area and partial provinces.The result demonstrated that there were 103 species of pteridophyte (including varieties and forms) belonging to 60 genera and 34 families in Jiande.The dominant families were Dryopteridaceae and Polypodiaceae, and the dominant genus was Dryopteris.There were 5 areal types in the family level and 8 types in the genera level, both family and genera was dominated by cosmopolitan and pantropical distribution.There was no endemic family or genera of China, but there was a high proportion of endemic species of China.The species distributed at limestone area was special, and there were some endemic species.The geological and fossil showed that pteridoflora in Jiande had ancient origin and widely associated, especially closely with India, Indo-China Peninsula and Japan.