The studies show common features among them such as the stomata which is found in the lower epidermis, the wavy anticlinal walls of the epidermmal cells and the cyclocytic stomatal type.

• 结果表明，其间存在明显共性：表皮构造均为单面气孔式，上下表皮细胞垂周壁皆呈不同程度的波状起伏，气孔器类型皆为环列型。