In addition, the stomata apparatus are ruleless and only distribute on the lower epidermis.On the upper epidermis, anticlinal wall caves in sinuose groove to countercheck the transpiration.

• 为进一步研究这2种忍冬属植物叶的形态解剖特征，通过光学显微镜观察发现，叶均为异面叶，栅栏组织发达，细胞长柱形；