Four new threatened species of Rinorea (Violaceae), treelets from the forests of Cameroon

Summary Four species of Rinorea are described as new to science; all four endemic evergreen rain forest in Cameroon. villiersii Achound. and R. amietii Achound placed [unranked] Crassiflorae M.Brandt, while, dewildei faurei fall Dentatae Engl. The first appears be the Solé Forest Reserve northeast Yabassi Littoral Region. second third found mainly South Regions, extending West Region Central fourth species, is an Santchou at foot Dschang Plateau taxonomic affinities discussed, illustrations a distribution map provided, their conservation status assessed. All threatened with extinction according 2012 IUCN categories criteria.