盾叶萆和细萆皆来源于薯蓣属萆植物的根茎，它们形态相似，为研究它们的生药学特征并鉴别之，通过宏观性状况察、显微镜微观结构探索及扫描电镜超微结构研究，结果发现该两药材的宏观、微观和超微结构既有单子叶植物的共同特征，也有单子叶植物不常具有的特征。两药材的上述生药学特征大多相似，但也有些差异，利用这些差异可对两药材进行鉴别。

Macroscopic，microscopic characteristics of Rhizoma Dioscorea zingiberensis and D.tenuipes as well as their ultramicro characteristics of vessel inner walls were studied.Results showed that their macroscopic，microscopic and ultramicro characteristics，though very similar in monocotyledonous generalities，yet there existed some specific differences which could be used as a basis to differentiate one from the other.