An examination of the endexine in pollen from 22 species in five genera (mainly African) of the Psychotrieae allows a preliminary survey of endexine Variation in this large tribe. The endexine surface varies from smooth (Chazaliella) to flocky (Chassalia) or granular (Psychotria, Gaertnera and Pagamea). The granulation of the three latter genera is interrupted by endocracks. There are no proper endoapertures, but in Gaertnera and Pagamea, apparent endexine thickenings (''costae'') occur at the polar ends of the mesoapertures. Therefore, endexine characters have systematic importance at the generic level in this tribe. The results also indicate pollen morphological differences between the subgenera Psychotria and Tetramerae of Psychotria.