Objective: To Study the characteristics of Herba Spirodelae(Spirodela polyrrhiza) and its adulterants S. oligorrhiza and Lemna minor for identification.
Method: The characteristics were compared and identified morphologically and histologically.
Result: The morphological and histological characteristics of S. polyrrhiza, S. oligorrhiza and L. minor are different from each other. Several tables, keys and drawings are given.
Conclusion: The main macroscopical and microscopical characteristics can be used fo differentiate S. polyrrhiza from its adultrants.
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