Abstract: Lishan Mountains, belonging to Zhongtiao Ranges, is situated in 35°16'30"~35°27'20"N and 111°51'10"~112°05'35"E in the southern Shanxi. There is a typical warm-temperate continental monsoon climate in the mountains, which is mid-cooler and arid in winter, however, warm and rainy in summer. It is now known that there are 966 species of seed plants, belonging to 490 genera and 123 families in Lishan Mountains respectively, among which temperate distribution compositions make significant dominant. The temperate distribution compositions have 290 genera and make 66.36% in total genera(excluding cosmopolitan), and 504 species and make 53.22%in total species(excluding cosmopolitan). Based on the analysis of the flora of species, genera and construction in Lishan Mountains, it is indicated that the flora has some typical characteristics of warm-temperate deciduous broad-leaved forest. Moreover the floristic geographic compositions of seed plants of Lishan Mountains and some mountains, China were studied by using principal component analysis and diversity indices, respectively, and the results shown that the floristic geographic compositions of Lishan Mountains was closely similar to that of Taibai Mountains, Shaanxi, Taiyue Mountains, Shanxi, Tai Mountains, Shandong. However, the floristic of Lishan Mountains was significant different from that of Luya Mountains, Shanxi, Guandi Mountains, Shanxi, Changbai Mountains, JiLin.

Key words: Lishan Mountains, seed plant, flora, Shanxi Province