A pollen-morphological study has been carried out on three genera of the Marcgraviaceae Norantea Aublet, Souroubea Aublet and Ruyschia Jacquin). Nine pollen types in Norantea and three pollen groups in Souroubea could be established. The pollen grains of Ruyschia could not be differentiated from those of Souroubea. Several distinct evolutionary trends have been distinguished in Norantea. These evolutionary trends were less distinct in Souroubea. A key to the pollen types has been given in addition.