The leaf epidermal characters of 3 species of Vetiveria zizanioides were observed and compared under light and scanning electron microscopes. The results showed that leaf epidermis consisted of long cells, short cells, stomas, micro-hairs, prickle-hairs, macro-hairs and mastoid process. The long cells were rectangle, with shallow or deep wavy anticlinal walls. The short cells has dumbbell, cruciform and nodular types. The stomata were tandem and triangular or dome shaped subsidiary cells. The leaves distributed ad- and abxially epidermis of micro-hairs and mastoid process. The lower epidermis also have prickle-hairs and macro-hairs. The leaf epidermal were covered with thick cutin and strip upheaval. The study could clarify that the same characteristic of microstructure of cotyledon epidermis of V. zizanioides, and the difference in species, so it could provide morphological evidence for stress resistance and taxonomy.%运用光学显微镜和扫描电镜的方法,对3种香根草属植物的叶表皮微形态特征进行观察和比较.结果表明,香根草属3个种的叶表皮皆由长细胞、短细胞、气孔器、微毛、刺毛、大毛和乳突所组成.长细胞为长方形,垂周壁呈深波状或浅波状,短细胞有哑铃形、十字形,结节形；气孔器均为纵列型,副卫细胞为圆屋顶形至三角形；上下表皮都具微毛和乳突,下表皮还具刺毛和大毛；叶片表面有一层厚厚的角质膜,并常有条状隆起.该研究说明香根草属植物叶表皮微形态既有种间相似的特征,又存在一定的特异性,可为本属种间的分类及其抗逆机理提供依据.
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