Objective: To study identification methods of Dai medicine" Guomaguo", the fruit of Spondias pinnata.

Methods: Characteristic, microscopic observation and TLC idertification were used to authenticate this crude drug.

Results: The characters of the cross section, powder and TLC of the drug were reported, and the relevant drawings of the tissue, powder and TLC of this ethnomedicine were drawn.

Conclusion: These results can supply evidences for the identification of the ethnomedicine in its exploitation and utilization.

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