Abstract: This paper is the first report on the morphological characteristics of pollen of three species of Padus in China and the results showed that the species of Padus can be classified on the basis of the morphology, size, and exine sculpture of pollen.P.asiatica Kom.has pollen grains with size 32.0×25.5μm, finely curved strialion, and marked perforation and var.subglabra has pollen grains with relatively large size 37.5×17.7μm and more per-foration.The species with pollen grains size 32.0×24.4μm, finely strainght striation, and less perforation is P.avium Mill.and the species with pollen grains size 21.0×22.1μm, widely straight striation, and indistinctive perforation is P.beijingensis Y.L.Han et C.Y.Yang sp.nov.

Key words: Padus, P.asiatica, P.avium, Pollen morphology