Flora of Woody Plants in Pangquangou Nature Reserve,Shanxi

Pangquangou Nature Reserve locates in the middle of Luliang Ranges,Shanxi.The floistic characterastics of woody plants was studied in this reserve.There were 175 species of woody plants in Pangquangou Nature Reserve,which belongs to 72 genera and 36 families.Among them the gymnosperm was 7 species,6 genera and 2 families,and the angiosperm was 168 species,66 genera and 34 families.Onotypic and oligotypic families,onotypic and oligotypic genera took larger proportion in the composition of the families and genera.The floristic analysis showed the geographical element was complex.For family,cosmopolitan,tropic to subtropic to temperate and temperate types were 27.78%,33.33% and 33.33% of the total families,respectively.For genus,there were 51 genera belonging to temperature type,which accounted for 75.00% of the total genera.The endemic to China were the largest types of species elements.Some species such as Larix principis-rupprechtii,Rosa xanthina and Pinus tabulaeformis were constructive or dominant species of the region vegetation.It was different in endemic of families,genera and species.There was no family,but 2 genera and 79 species were endemic to China.