The mutagenic effects of colchicine treatment on chromosome ploidy and the leaf epidermal cells of radicles of Medicago sativa cv. Qingshui THE RH-PH FLUORESCENCE AND LIGHT MICROSCOPE OBSERVATION OF THE ACTIN CYTOSKELETON IN ONION BULB EPIDERMIS CELLS Effect of Vegetation Concrete on the Leaf Epidermis Cell of Two Varieties of Poa pratensis L. 四棱草属比较形态及其分类系统位置的研究──Ⅳ.四棱草属及其近缘属叶表皮结构特征 The Micro-morphology Characters of Leaf Epidermis of Iris