Rhaptopetalumrabiense Kenfack & Nguema, sp. nov. from the Rabi forest in south-western Gabon is described, illustrated and assigned a provisional conservation status of "Critically Endangered". An identification key to the five Gabonese species of Rhaptopetalum is also provided.
Keywords: ForestGEO; Gabon; IUCN Red List; Rabi; new species; permanent plot; rainforest; taxonomy.