六种前胡属植物叶表皮形态学研究

采用光学显微镜对前胡属6种植物的叶表皮进行了观察, 从显微镜观察的结果表明：前胡（P.praeruptori）的叶片气孔仅存在于下表皮,红前胡(P.rubricaule)，松潘前胡(P.songpanens)，长前胡(P.turgeniifolii)，滇西前胡(P.delavayi)和刺尖前胡(P.elegans)的叶片两面表皮均有气孔；气孔类型均为不规则形；上下表皮细胞形状为多边形或不规则形；垂周壁式样可区分为近平直、浅波状和深波状；气孔密度和气孔指数在属内种间，尤其是在近缘种间有所差异，可以作为鉴别特征。六种前胡属植物的叶表皮形态均为首次报道。

Leaf Epidermal Characters of 6 Species in Peucedanum and its Taxonomic Significance

Leaf epidermis of 6 species in Peucedanum from China were examined under light microscopy. They are reported for the first time.The microscopic observation showed that: imperatorin (P.praeruptori) stomatal only lies under the skin, red imperatorin (P.rubricaule), Songpan imperatorin (P.songpanens), long imperatorin (P.turgeniifolii) Dianxi imperatorin (P.delavayi) and the sharp thorns imperatorin (P.elegans) leaves both sides epidermal stomata; Stomatal types are irregular in shape; upper and lower epidermal cell shape or irregular polygons; anticlinal walls pattern can be divided into nearly straight, wavy shallow and deep wavy. Stomatal density and stomatal index is the difference between the species. Therefore, the type of crystals in epidermal cells and some distinct characters varies obviously with species, in particular among species allies.