The powder character are phloem fiber bundles,crystal fibers(fibers with sheath of crystal cells),druse and secretory cells.

• 茎横切面韧皮纤维束与筛管群、韧皮薄壁细胞相间排列 ,粉末中可见大量韧皮纤维束、晶纤维、分泌细胞、草酸钙方晶及簇晶。 理化鉴别特征 :可能含有黄酮类成分 ;