RESULTS The surface of the young stems was yellow-green or pale brown.

结果幼嫩枝条表面黄绿或浅棕色；

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Although leaf photosynthesis of this weed is of the C3 type, a C4-like vascular bundle full of chlorophyll was observed in the main vein of the leaf and young stems.

尽管薇甘菊叶片为典型C3植物特征，结果发现了茎以及主叶脉内存在类似C4途径的、具有丰富叶绿体的维管束鞘结构。

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