菊科莴苣族6属11种植物的叶表皮形态

在光学显微镜下观察了菊科莴苣族6属11种植物的叶表皮形态，观察了叶上下表皮细胞形状及垂周壁式样、气孔器类型和分布特征。结果表明：这些植物的叶上下表皮细胞多数为不规则形，少数为多边形；垂周壁式样多数为浅波形或深波形，少数为平直形。一些种类气孔器仅分布在下表皮，但也有不少种类上下表皮都有气孔器分布。气孔器都属于无规则型，且都是随机分布。叶表皮显微构造在一定程度上能反映出类群间的关系,为探讨莴苣族的分类学问题提供了新的证据。

Morphological Characters of Leaf Epidermis of Eleven Species Belonging to Six Genera in Lactuceae (Compositae)

The leaf epidermis of 11 species belonging to 6 genera in Lactuceae(Compositae) was investigated using light microscopy. Morphological characters of leaf epidermis, such as the shape of leaf epidermal cells, patterns of anticlinal wall, stomatal type and distribution, are of important taxonomic significance. The results show that the shape of epidermal cell is irregular, and rarely polygonal; the patterns of anticlinal walls are sinuolate or sinuate, and rarely straight; the stomatal apparatus, which are randomly distributed, only exist in the abaxial epidermis for a few species, but for others, they occur in adaxial and abaxial epidermis simultaneously. All the stomatal apparatuses fall into anomocytic type. In a certain extent, leaf epidermal characters reflect the relationship among or between the taxa, thus providing new evidence for taxonomy of Lactuceae.