Most of Epimedium species are commonly used Chinese medicine that it is difficult to identify medicinal material and classification.Pollen morphology,size and exine ornamentation from 31 species of the genus Epimedium were examined using the scanning electron microscope.Results showed that：(1) The pollen shapes are mostly prolate.The minority of them are spherical with the size of (15.5-25.0) ×(27.3-48.1)μm and polar views are mostly trifid circular,with three hole groove.(2)There are three kinds of pollen grains with reticulate,article reticulate or striped exine ornamentation.(3) The study suggests that the exine ornamentation of pollen grains,among each species,would be different in shape and size of the mesh and surface characteristics of the net ridge etc.This study provided some new evidences for the plant taxonomy and the identification of medicinal materials of Epimedium.