壮药小黄草生药学鉴别研究

Pharmacognosy Identification on Dendrobii Loddigesii Caulis

目的：壮药小黄草生药学鉴别研究。方法：原植物鉴别、性状鉴别、显微鉴别、鉴别四大鉴别法。结果：多年附生草本，茎圆柱形，叶纸质，无柄，萼囊短、钝，花瓣椭圆形；切面类圆形，表皮细胞较小，类长方形，排列紧密，外被金黄色角质层；以石油醚乙酸乙酯冰薄层茎横醋酸（8：3：4d）为展开剂，以10％硫酸乙醇溶液为显色剂，供试品与对照药材显相同颜色的斑点。结论：以上特征明显、稳定，可作为壮药小黄草的生药学鉴别依据。

Objective： The paper focused on the study on pharmacognosy identification of Dendrobii Loddigesii Caulis. Methods： There were four methods for identification applied in the study, including original plant identification, morphological identification, microscopic identification and thinlayer identification. Results： As the perennial epiphytes, it has the cylinder shaped stem, paper-like leaf without petioles, short blunt mentum and oval like petal It was observed that the stem transection was round like, of which the closed reetangle-like small epidermic cells were surrounded by the golden cuticula. Taking petroleum ether-ethyl acetate-aeetic acid （8 ： 3 ： 4 d） as the developing solvent and 10%ethanol solution of sulfuric acid as the eolor-developing agent, the color of Dendrobii Loddigesii Caulis was showed the same as the control sample. Conclusion： The characteristics above are obvious and stable, which can provide the evidence for the pharmacognosy identification on Dendrobii Loddigesii Caulis.