With colourless nail polish, study on the stomatic distribution of outer epidermis in the young stem, aged stem and aged leaf sheath, and adaxial and abxial leaf epidermis of young and aged leaves in S. purpurea, Z. pendula and C. communis was conducted.

• 用无色指甲油印痕法对鸭跖草科的紫竹梅、吊竹梅和鸭跖草的幼茎、成熟茎、成熟叶鞘的外表皮和幼叶、成熟叶和上、下表皮的气孔分布进行观察。