Abstract: There are 555 species(including 14 varieties) of angiosperm belonging to 301 genera and 88 families in the Xiaotianchi forest region of Lincheng County,Hebei Province.Among them,the number of dominant family consisting of more than 10 species is 14, with a total of 305 species.The number of typical family is 7.There are 5 genera of the Chinese endemic genus consisting of 6 species.There are Tendemic species of Hebei Province.The analysis of the compositions and the geographical element in the flora showed that north temperate element has made up the dominant type of the angiosperm and there is 221 species belonging to 98 genera,approximating to 37.69% of total genera in Xiaotianchi,and 46.92% of total species.Old wold temperate and Pantropic element are the second majority of the angiosperm.The data showed that the flora of Xiaotianchi has obvious temperate characteristics too.

Key words: Lanthanum, Membrane permeability, Root exudate, Nutrient content