中国种子植物区系定量化研究──Ⅲ．区系指数（Flora　Index）

QUANTITATIVE STUDY ON SEED PLANT FLORA OF CHINA──Ⅲ.FLORA INDEX

本文从植物区系研究现状出发，依照吴征镒教授关于中国种子植物区系研究思想与方法，提出了用于植物区系比较研究的一个新指数－区系指数（ＦｌｏｒａＩｎｄｅｘ），详细讨论了其意义并用实例介绍了其应用情况．

In the present paper,a new Flora Index i. e.Fij=(Lij/Cj)/(Li/C)is specially designed to resolve the comparative study on numerous regional floras,and its noral geographical and mathematical significance has been disscussed in detail.At last,the seed plant flora of Dujiangyan city and other 13 regional seed plant floras in China are shown to be examples by using floral index.