OBJECTIVE:To establish a method for the identification of Chongqing local medicinal material Heracleum hemsley-anum. METHODS:The original plant morphology,morphological characteristics,microscopic characteristics (transverse section and powder),were identified. RESULTS:H. hemsleyanum had cone shape root,brown,many-branched with special fragrance;the microscopic characteristics of taproot a transverse showed no differences with lateral root transverse section,primary xylem was di-arch,secondary phloem was more developed than secondary xylem,secondary phloem was rich in the oil chamber. Vascular tissues contained a large number of parenchyma cells. In TLC chromatrogram,the test sample showed the same color fluorescent spots with-the substance reference of osthole and columbianadin in the corresponding locations. CONCLUSIONS:The established method is simple with high accuracy,and can be used as the basis for identification of H. hemsleyanum.%目的:建立鉴别重庆道地药材独活的生药学方法.方法:从原植物形态、性状特征、显微特征(横切面、粉末)、薄层色谱(TLC)方面鉴别独活.结果:独活外形上根圆锥状,褐色,多分枝,具特异香气;主根横切面与侧根横切面显微特征无区别,初生木质部为二原型,次生韧皮部较次生木质部发达,次生韧皮部中有丰富的油室.维管组织中含有大量薄壁组织细胞.TLC色谱中,供试品与蛇床子素和二氢欧山芹醇当归酸酯以[石油醚(60~90℃)-乙酸乙酯(7:3,V/V)为展开剂,紫外光灯下检视]对照品色谱相应位置上显相同颜色的荧光斑点.结论:该方法操作简单、准确度高,可作为独活生药学鉴别的依据.
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