%0 Journal Article
%A Tseng-Chieng Huang 
%T The Floristic Relationship Among the Islands of Taiwan, Taipingtao and Tungshatao(1)
%D 1998
%J Taiwania
%V 43
%N 3
%P 165-176
%U https://taiwania.ntu.edu.tw/abstract/116
%X The floristic relationship among the Islands of Taiwan proper, Taipingtao (Aba Itu Island) and Tungshatao (Pratas Island) is presented. The floristic relationship is expressed by the similarity index of the two latter floras. The relationship between Taipingtao and Tungshatao is calculated by the index of similarity (Is) of Sorenson (1948) as 59%. Thus, these two islands are not very closely related floristically. When two floras are not comparatiable in size  i.e., the size of the large island is more 100 times bigger than that of the small island, the index of common plants (Ic) to express the floristic relationship of the small flora to the large one is proposed. The calculation is based on the common species of two floras divided by the total number of plants of the small island. Thus, the index (Ic) of floras of Taipingtao and Tungshatao to Taiwan proper is 88% and 93% respectively. The index (Ic) of floras of Taipingtao and Tungshatao to a small coastal area of Kenting National Park in Taiwan proper is 84% and 85%, respectively. The close floristic affinity among these islands is mainly due to their high composition of coastal elements in common.
%M doi:10.6165/tai.1998.43(3).165