1. There are two types of the pollen morphology in this genus, one (polar view is hexagon) is nearly sphersidal in shape, there are tricolporate and netten ridge with spine on the surface.
   该属的花粉形态基本可分两个类型，一类极面观为六边形，赤道面观近圆形，具三孔沟，表面纹饰为大网，网脊上具圆锥状刺；

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