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生药当归的性状鉴别特征

生药当归的性状鉴别特征

2025-03-17 11:51:06

推荐回答（1个）

回答1：

　　略呈圆柱形，下部有支根3-5条或更多，长15-25cm；表面黄棕色至棕褐色，具纵皱纹及横长皮孔；根头直径1.5-4cm，具环纹，上端圆钝，有紫色或黄绿色的茎及叶鞘残基；主根表面凹凸不平，支根直径0.3-1cm，上粗下细，多扭曲，有少数须根痕；质柔韧，断面黄白色或淡黄棕色，具放射状纹理，习称“菊花心”皮部厚，有裂隙及多数棕色油点，习称“朱砂点”；木部色较淡，形成层环黄棕色；有浓郁的香气，味甘、辛、微苦。祁山大黄提供。

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