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-Aperture en forme de sillion (colpus) : pollen colpé(interruption local de l'ectexine) Pollen généralement allongé a l'etat sec, s'arrondissant lors de l'hydratation Ex : ajonc-Aperture en forme de pore -> pollen poréGénéralement sphérique (Poacées, plantain)MonoporéTriporéDodécaporé-Aperture en forme de sillion + pore -> pollen colporé(Astéracées, pois)
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