摘 要 ：利用光学显微镜和扫描电子显微镜，观察了新疆委陵菜属（Potentilla L.）锥状花柱组（Sect.Conostylae(Wolf)Yü et Li）15种委陵菜植物叶表皮的微形态特征。对其叶表皮毛的类型、表皮细胞的形状及大小、气孔器的分布、气孔器类型、气孔形状、气孔大小、气孔密度、气孔指数、气孔外拱盖形态及其纹饰等指标进行分析：有几种植物叶的上表皮无气孔，而下表皮均有气孔器的分布，形状为长椭圆形、椭圆形、宽椭圆形和近圆形；气孔器的类型多为短平列四细胞型、无规则四细胞型、无规则型、围绕型和辐射型；表皮毛的类型为针状毛、带状柔毛和腺毛；表皮细胞分为不规则形和多边形；表皮毛特征、叶片表皮细胞的形状、垂周壁式样、气孔器的形状类型、气孔密度指数及蜡质纹饰等存在差异，可作为亚属间及种间分类的依据。
Abstract:The leaf epidermal cell micromorphology of 15 species of Sect. Conostylae(Wolf) Yü et Li of Potentilla L. from Xinjiang were investigated under light microscope (LM) and scanning electron microscope (SEM). The type of epidermal hairs, the size and shape of epidermal cells, the distribution and type of stomatal apparatus were studied. The stomatal size, stomatal density, and stomatal index were analyzed. The results show that there are stomatal apparatus on lower epidermal of all 15 studied species, but no stomatal apparatus on upper epidermal of a few species. The shapes of stomatal apparatus are long oval, oval, wide oval and nearly round. The stomatal apparatus of most species are short paracytic four-cell type, irregular four-cell type, irregular type, around type and radial type. The trichomes are needle-like hairs or ribbon pubescent hairs. The epidermal cells are polygonal to irregular. The characteristics of stomatal apparatus, stomatal index, wax ornamentation and trichomes are all obviously different among different species in genus Potentilla L. The leaf epidermal morphological characteristics could provide evidence to identify subgenus and species of Potentilla L..