Analysis of the Geographical Element of Pteridophytes on Rock in Zunyi Region of Guizhou Province

The specimens of Pteridophytes on rock that collected in Zunyi region of Guizhou Province were researched,and the floristic geographic composition were analyzed.The results showed that there were 65 species belonging to 31 genera in 17 families.the tropical properties was the dominant in the area types of families and genera.For species,the East Asian elements corresponding to 47.67% of the total.Followed by the East Asian elements,Tropic Asia elements corresponding 24.62% of the total.The Endemic to China corresponding to 18.46% of each.It could be concluded that the temperate elements were the main body of this area and was a part of East Asia flora.