Figure 4:Microphotographs of basal stem leaf abaxial epidermis under L M (20×, dark lines in the pictures were leaf veins). 1. C. amuricus Maxim.; 2. C. compressus L.; 3. C. cuspidatus H.B.K.; 4. C. glomeratus L.; 5. C. iria L.; 6. C. rotundus L.; 7. C. difformis L.; 8. C. difformis L. (upper leaves).