Alveolae of the proximal exine are smaller and less regular in form than those at equatorial region.
近极区的穴较之赤道区的要小且形状较不规则。
Except for some differences in exine ornamentation and pollen size, there is no great evolutionary divergence among genera in pollen morphology.
总体来讲，花粉没有大的演化分异，只是表面纹饰和花粉大小有一定的差异。
Except for some differences in exine ornamentation and pollen size, there is no great evolutionary divergence among genera in pollen morphology.
总体来讲，花粉没有大的演化分异，只是表面纹饰和花粉大小有一定的差异。
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