Analysis on the Flora of Seed Plants alongside the North Branch of Wanjiazhai Yellow River Diversion Project,Shanxi

Based on the dataset from the field,the composition of spermatophyte flora and its geographic elements alongside the North Branch of Wanjiazhai Yellow River Diversion Project(WYRDP),Shanxi was studied.There were 612 species,283 genera and 66 families of seed platns.Among which gymnosperms have 7 species,4 genera and 2 families,and angiosperms have 605 species,279 genera and 64 families.The angiosperms are composed of dicotyledonous and monocotyledon,having 478 species,224 genera and 55families,and 127 species 55 genera and 9 families,respectively.The 283 genera were divided into 15 genera areal-types and 612 species belongs 13 areal-types.Among the genera compositions,the temperate elements is compose of 183 genera,accounting for 79.22% in the total genera(excluding Cosmopolitan),occupying at the first position,and it suggests this flora has obvious temperate characteristics.Moreover,among the species compositions,the Endemic to China consists in 174 species,accounting for 29.24% in the total species(excluding Cosmopolitan),being at the first position;the next is the Temperate Asia,and then the East Asia.