Micromorphology of Leaf Abaxial Epidermis of Some Poa Species in China A study on the leaf abaxial epidermis of Fimbristylis Vahl from Shandong Morphology of Leaf Abaxial Epidermis of Some Festuca Species in China Micro-morphology of leaf abaxial epidermis in different germplasms of Dioscorea polystachya