Sandao-Chaihu's stem is single or more, the base is purple yellow. North-Chaihu's basic leafstalks are all purple red, leaves grown on the stems are long round pin-shaped.
北柴胡基生叶柄均为紫红色,茎生叶为长圆状披针形;南柴胡茎生叶及茎下部叶有长柄,条形或狭条形,为绿色;三岛柴胡茎生叶及下部叶有叶柄,为紫红色,叶片呈黄绿色。
参考来源 - 北柴胡、南柴胡和三岛柴胡比较生物学的研究·2,447,543篇论文数据,部分数据来源于NoteExpress
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