On the Flora of Seed Plants in the Eastern Segmentof Zhongtiao Mountains,Shanxi

Zhaogtiao Mountains,located in the south of Shanxi,is situated between35°1 2′～ 35°4 5′E and 1 1 0°33′～ 1 1 2°2 7′N.There are5 88species of seed plants,belonging to34 2 genera and1 0 0 families in the eastern segment of Zhongtiao Mountains.Among which temperate distribution compositions make signifi- cant dominant and it has 1 75 genera and make 5 6.0 9% in total genera.The tropic elements is secondary, which have 89genera and make 2 8.5 3% in total genera.Moreover,among the floristic elementof species, endemic to China have 2 2 4 species,accounting for 38.82 % in total species and make evidently dominant. They are the main elements of the edificatos and dominant species of dominant vegetation types. Compared with the flora and the vegetation ofthe southern segmentof Taihang Mountains and Guandi Mountains in Shanxi,and Taibai Mountains,Qinling Ranges in Shaanxi,there is higher homogeneitive and closely relationship between the eastern segmentof Zhongtiao Mountains and the southern segmentof Tai- hang Mountains and Taibai Mountains.And there are some significantdifferences between the eastern seg- ment of Zhongtiao Mountains and Guandi Mountains.