在山茶属中花粉的大小和染色体的数目有一定相关性。据分析,组内种间比不同组种间的关系要密切一些;而同一物种中,具不同染色体的个体之间,这种关系则更为紧密。种的形成与花粉的大小亦有一定的关系。天然野生类型的花粉,比长期栽培和选育的品种,其花粉更小,且形状更趋一致。研究表明,那些变异很大,且正常花粉百分比较低的种类,在许多情况下常被视为杂种起源。因此,花粉大小和正常花粉百分比的高低可以作为研究山茶属 There is a certain correlation between the size of pollen and the number of chromosomes in camellia. According to the analysis, the interspecific relationships within a group are closer than those between different species. In the same species, individuals with different chromosomes are more closely related. The formation of species and pollen size also have a certain relationship. Natural wild-type pollen, pollen than long-term cultivation and breeding, the pollen is smaller, and more consistent shape. Research shows that those species that vary greatly and that have a lower percentage of normal pollen are often considered as the origin of the hybrid in many cases. Therefore, the pollen size and the percentage of normal pollen can be used as a study of Camellia