Floristic Diversity of Seed Plants in Shanxi Province

This paper studied floristic diversity of seed plants in Shanxi Province using some basic methods and principles of the floristic geography and based on the composition and geography elements of the families,genera,species of plants from Shanxi Province.The results are as follows: The diversity is abundant in this area,there are 2576 species of seed plants in Shanxi Province,which belong to 816 genera and 143 families(not including cultivated plants).Among them there are about 6 families,13 genera,28 species are in Gymnospermeae;137 families,803 genera,2548 species in Angiosperm,which shows the distribution of plants in Shanxi Province is consistent with the climatic features of the area.Analysis of the floristic elements based on families,genera,and species shows that they are very complex in Shanxi Province.Among the areal-types of Chinese genera of seed plants,there are 15 types and 16 subtypes in this area.Temperate floristic elements are significantly dominant in genera,in which percents of North Temperate distribution is the highest,25.5% in the total number of genera in this area.It is indicated that this area has obvious temperate characteristics of the flora,and it also has the characteristices of permeation,intersection,transition and frangibility.