TWO NEW SPECIES OF POWDERY MILDEWS
白粉菌的两个新种

Two new taxa of the powdery mildews collected from Sichuan Province are des- cribed.They are:Uncinula euscaphidis Xie sp.nov.on Euscaphis japonica (Thunb.) Dipp.(Staphyleaceae) and Uncinula idesiae Xie sp.nov.on Idesia polycarpa Maxim.(Fla- courtiaceae).Both families are new records of host families for the genus Uncinula.Type specimens are deposited in the Botanica Herbarium of the Department of Biology,Nanchung Teachers College,Nanchung,Sichuan,China.