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By: Taedoumg, Hermann - Sonké, Bonaventure - Hamon, Perla - De Block, PetraType: ArticleIn: PhytoKeysVolume: 83Series:Issue:Date: 2017Page Range: 103-118Publication Info: Pensoft Publishers 2017Subjects: C. capitatum C. gabonicum Cameroon Congo Craterispermum dimorphic inflorescences and flowers dioecy DR Congo Gabon heterostyly Nigeria Rubiaceae