Studies on the flora of Wuzhishan,Hainan Island

The spermatophyte flora of Wuzhishan area consists of 1 882 species,821 genera and 177 families. Analysis of the floristic composition and the geographical elements shows that the flora has the following characteristics: it is an important component of Hainan Island flora and predominated by tropical elements,especially the tropical Asia one occupied 26.78% of total number of genera and pan-tropical one occupied 26.40% of total number of genera. And the comparison of this flora and other 6 floras indicate that the flora of Wuzhishan has a tight connection with the flora of continent. Meanwhile many of the Cathaysian floristic elements can be found in the Wuzhishan's flora,which proves that this flora is undoubtedly one of an important part of the Cathaysian flora in nature.