The pollen morphology in 168 species ofPsychotria(Rubiaceae, Rubiodeae, Psychotrieae) has been investigated using light microscopy and, for 61 of the speices, scanning electron microscopy. Transmission electron microscopical studies have been carried out for seven of the species.Psychorriais very heterogeneoous pollen morphologically and pollen grain characteristics cannot be used for the delimination of the basis of aperture morphology, thickness of exine, size of lumina, muri, columellae and bacula, and sculpture. A key to the identificantion of the pollen types is presented and all types are issstrated. The pollen grains inPsychotriaare usually 3–to 5colporte, 3‐to 5‐colpate or inapertuarate, rarely 2–4‐or 5‐porate, and have an exine that vanes widely in thickness. The sexine is reticulate, microreticulate, tectate‐perforate, rugulate or intectate, and smooth or sculptured. Exine morphology presents important characters for the taxonomic subdivision ofPsychotria. Previous intrageneric classifications are in part supported by pollen morphology, but contradictions between this and other sets of charactes, such as inflorescence feature