目的:对簕欓根进行生药学研究,为簕欓根的临床利用和开发提供依据。方法:采用来源鉴别、性状鉴别、显微鉴别和理化鉴别方法等。结果:簕欓根的外皮易剥落,皮部与木部易分离,木部有环纹;根横切面有3～4轮偏心性、同心环状年轮,导管沿径向排列,橙皮苷结晶多,有方晶;粉末中淀粉较少;理化结果表明簕欓中含有黄酮、生物碱等主要活性成分。结论:该研究为簕欓根药材的深入研究和开发利用提供了理论依据。 OBJECTIVE: To study the pharmacognosy of Gracilaria tenuis for the purpose of providing the basis for the clinical use and development of Gracilaria giganteus. Methods: Source identification, character identification, microscopic identification and physical and chemical identification methods. Results: The skin of the tapioca root was easy to peel off, the skin was easily separated from the wood, and the wood was ring-shaped. The root cross-section had 3 to 4 eccentric rings with concentric rings, Crystallization, there is a crystal; starch in the powder less; physical and chemical results show that the emu contains flavonoids, alkaloids and other major active ingredients. Conclusion: This study provides a theoretical basis for the further research and development and utilization of medicinal materials of Ziziphus alata.