Abstract: The leaf epidermis structures of seven species in the genus Euphorbia from Anhui province in China , have been examined with LM and SEM . The shapes of leaf epidermal cells are usually irregular or polygonal and the anticlinal walls are straight , arched , sinuolate, sinuous or sinuate . The stomata apparatus is anomocytic type and some species have simple or multicellular hairs which have neoplasitic process under SEM . And the cuticular membrane of leaf epidermis is scaly or granular under SEM . The result shows significant micromorphological differences of leaf epidermis of the seven species and it is taxonomically helpful for the identification of some species with similar leaf morphology .

Key words: Euphorbia

摘要： 利用光镜和扫描电镜对安徽7 种大戟属(Euphorbia) 植物叶表皮进行了观察。发现该属7 种植物叶表皮细胞为不规则形或多边形, 垂周壁一般为平直、浅波状、深波状; 气孔器通常为无规则型, 有的种类叶表皮具单细胞毛或多细胞毛, 表皮毛在电镜下具瘤状突起的纹饰。在扫描电镜下, 角质层纹饰多具鳞片或颗粒等特征, 种间有细微差别。结果表明该7 种植物叶表皮微形态有明显差别, 这些表皮特征有助于识别一些在外部形态较相近的种类。

关键词: 大戟属, 叶表皮, 微形态FONT