ANALYSIS ON THE FLORA OF SEED PLANTS IN MANGHE NATURE RESERVE, SHANXI

Manghe Nature Reserve, belongs to Zhongtiao Ranges, is located in southeast Shanxi province and between 112°22′11″～112 °31′35″E, 35°12′30″～35 °17′20″N. There is a typical warm temperate semi wetness continental monsoon climate in the area, which is hot and rainy in summer, but mid cooler in winter. It is now known that there are 866 species of seed plants in the region, which belongs to 435 genera and 103 families. Among them there are about 3 families,5 genera, 6 species in Gymnospermae and 100 families, 430 genenra, 860 species in Angiospermae ( 90 families, 346 genera, 748 species in Dicotyledoneae and 10 families, 66 genera, 112 species in Monocotyledoneae).Analysis based on families, genera and species shown that the floristic elements in the region were diversity. Among which Tropic-Subtropic-Temperate (45 families, accounting for 43.69% in total families) was dominant in the families; and Temperate floristic elements (264 genera, accounting for 60.69% in total genera) made significant dominant in genera, in which North Temperate elements(136 genera, accounting for 31.26% in total genera) is the largest among the genera; moreover, the species of endemic to China (305 species, accounting for 35.22% in total species) was more than the others, such as Pinus tabulaeformis, Pinus bungeana, Populus cathayana, Betula albo-sinensis, Quercus baronii, Quercus aliena var. acuteserrata, Pteroceltis tatarinowii, Ostryopsis davidiana and Viburnum schensianum, and Temperate Asia (190 species, accounting for 21.94% in total species) and East Asia (154 species, accounting for 17.78% in total species) elements were on second and third place. Furthermore there are 8 species of rare and endangered plant of state protected in Manghe Nature Reserve,such as Taxus mairei,Cerdidiphyllum japonicum, Archineottia gaudissarti and Gastrodia elata