Abstract: The morphological characters of the leaf epidermis of 12 species(Angiopteridaceae) from Yunnan were studied through a light microscope.The stoma densities of 12 species and the anatomical photoes of the leaf epidermal cells of 11 species were reported for the first time.It was found that each species had a special stoma density,and the stoma types were different between Angiopteris fokiensis Hieron and Archangiopteris henryi Christ et Gies,which could be considered as key characters to the genera and species of Angiopteridaceae.