There are four primary exine sculpture types of Sect.Camellia in genus Camellia: rugulate-fossulate, rugulate-ripple, rugulate-ripple to granutate and granutate.

• 山茶属红山茶组植物花粉外壁纹饰主要有皱沟状、皱波状、皱波状-颗粒状和颗粒状4种类型。