目的 :探讨双茎类型西洋参在植物形态、电镜扫描、组织形态观察及化学成分方面的特点。方法 :利用常规方法测定氨基酸、微量元素、总皂甙 ,对组织形态进行显微摄影。结果 :双茎参根中总皂甙的含量为7.90 %、总氨基酸的含量为 8.3 2 % ,均高于单茎西洋参。结论 :形态区别明显 ,总皂甙、总氨基酸的含量以双茎为高 Objective: To investigate the characteristics of the double stem type American ginseng in plant morphology, electron microscopy, histomorphological observation and chemical composition. Methods: The amino acids, trace elements, and total saponins were determined by conventional methods. Results : The content of total saponins in the roots of double stems was 7.90 % and the content of total amino acids was 8.3 2 % , which was higher than that of the single stem American ginseng . Conclusion : The difference in morphology is obvious. The content of total saponins and total amino acids is high with double stems.