Morphology Structure of Leaf Epidermis of Genus Rubus in Heilongjiang

A study on morphology structure of leaf epidermis of the genus Rubus in Heilongjiang were conducted with scanning electron microscope(SEM).The results are as following:(1)The upper epidermal cells of Rubus are polygonal,with anticlinal wall strait,or the cells of upper epidermis are irregular-shaped,with anticlinal sinuolate;the cells of lower epidermis are irregular-shaped,with anticlinal wall sinuolate or sinuate.(2)Four types of trichomes are recognized in this study,as unicelluar unbranched and straight hair,unicelluar unbranched and curled hair,capitate and peltate glandular hairs,respectively.(3)Stomatal apparatus are located in lower epidermis;all of them are anomocytic,uni-layered outer stomatal rim,smooth or irregular-undulate inner margin of outer stomatal ledge.The differences in the leaf micromorphology of these species threw lights on the systematics of Rubus L.