Abstract: The leaf epidermal characters of 10 species, 1 variety (16 samples) in different series of the genus Glycyrrhiza are observed with the light microscope under the conditions of epidermal maceration and paraffin section . The stomatal size , density and index were measured and counted . The results show that the shape of leaf epidermal cells are polygonal or irregular , and the anticlinal walls are straight, sinuate or sinuolate . The stomatal apparatuses can be divided into 6 types, most of them are anomocytic, anisocytic and brach paracytic , only one species usually has two to three types of stomatal apparatuses . Trichomes can be divided into two groups , simple trichomes and scales . These characters have some regularity in subdivision of the genus and supraspecific taxon , some differences were also found among species . Therefore these characters are much of signification in identification to subdivision of the genus, and also provide
evidence for studies on systematic relationships of several taxons in genus .

Key words: Glycyrrhiza

摘要： 应用叶片离析法和石蜡切片法, 在光学显微镜下观察了国产甘草属植物10 种1 变种共16 个代表植物的叶表皮特征。统计并测量叶表皮气孔大小、气孔密度及气孔指数。结果表明, 该属植物叶表皮细胞形态(表面观) 为多边形和不规则形, 垂周壁式样为平直、浅波缘、深波缘; 气孔器有6 种类型, 以无规则型、不等型、短平列型为主, 一种植物往往具有2～3 种气孔器; 毛状体为单毛和鳞片毛两种类型。以上特征在属以下、种以上的分类等级具有一定规律性, 有的也表现出种间差异, 对甘草属属以下等级的划分有重要价值, 同时也为本属一些分类群间的系统关系的探讨提供佐证。

关键词: 甘草属, 叶表皮, 系统学意义FONT