Analysis on the Floristic Characteristics of Wild Seed Plants in the Zhongtiao Mountains,Shanxi

A significant number of wild seed plants are located in the warm temperate zone of the Zhongtiao Mountains,located in southern Shanxi,China. Due to the warm moist climate,this region has the highest plant diversity and richest subtropical flora of Shanxi.Results from long-term research indicate that there are 1287 species of wild seed plants in the Zhongtiao Mountains,belonging to 519 genera and 111 families.Among them,4 families,6 genera,and 9 species belong to Gymnospermae and 107 families,519 genera,and 1278 species belong to Angiospermae.Among the flora， Taxus mairei，falls under the state’ s first level protection，while plants such as and Cercidiphyllum japonicum，Glycine soja，Elaeagnus mollis，and Fraxinus mandschurica fall under second level protection.Moerover，Shanxi provincial level protection exists for Populus purdomii，Ostrya japonica，Quercus spathulata，Pteroceltis tatarinowii，Ulmus lamellosa，Ficus heteromorpha，Euptelea pleiospermum，Lindera glauca，Lindera reflexa，Litsea pungens，Rhodiola rosea，Sinowilsonia henryi，Zanthoxylum planispinum，Toxicodendron vernicifluum，Staphylea bumalda，Staphylea holocarpa，Acer zhongtiaoense，Xanthoceras sorbifolia，Meliosma cuneifolia var. glabriuscula，Meliosma vaitchiorum，Actinidia arguta，Actinidia kolomikta，Idesia polycarpa，Kalopanax septemlobus，Cornus officinalis，Dendrobenthamia japonica var. chinensis，Ceratostigma plumbaginoides，Styrax hemsleyana，Styrax japonica，Styrax odoratissima，Chionanthus retusa，Trachelospermum jasminoides，Callicarpa japonica var. angustata，Kollwitzia ambilis，Codonopsis pilosula，and Platycodon grandiflorum.Analysis of the families，genera，and species，showed that the region’ s floristic elements have high diversity and different endemism of families，genera and species.The Cosmopolitan type was dominant (40 families)，followed by the Pantropic type (34 families).No family was endemic to China.Temperate floristic elements were significant for genera，with 351 belonging to temperate type.Moreover，12 genera were endemic to China，reflecting the characteristics of the temperate zone to the flora.Those genera endemic to China were the dominant types among the flora，followed by Temperate Asia and East Asia elements，respectively.They are the main elements of the constructive and dominant species of dominant vegetation types.