Four new species ofSabiceaAubl.(Rubiaceae)from tropical Africa are described and illustrated:Sabicea desseiniiZemagho, O. Lachenaud & Sonké from Cameroon, Gabon and Equatorial Guinea,Sabicea ezangaeZemagho, O. Lachenaud & Sonké from Gabon,Sabicea jongkindiiZemagho, O. Lachenaud & Sonké from Liberia and Ghana, andSabicea unifloraZemagho, O. Lachenaud & Sonké from Gabon. Their affinities are discussed, and the conservation status of each species is assessed.Sabicea speciosissimaK. Schum. is excluded from the genus, neotypified, and synonymised withRothmannia octomera(Hook.) Fagerl. Three other species are sunk into synonymy:Sabicea giganteaWernham withSabicea dewevreiDe Wild.,Sabicea arachnoideaHutch. & Dalziel withSabicea discolorStapf, andSabicea neglectaHepper withSabicea speciosaK. Schum. Lectotypes are designated for these six names.