Leaf: The palisade cells cross the main vascular bundle,which type is open bundle and another small vascular bundle above it,a stripe fiber bundle cross the two vascular bundles,which were surro...

• 叶栅栏组织细胞通过主脉;主脉维管束外韧形,上方又有一小外韧形维管束,两维管束被一条纤维束分开,其外侧均有纤维束,呈环状;薄壁细胞中含有大量针晶和少量砂晶。结论以上特征可作为鉴别三叶青藤的参考依据。