@article {98, title = {Le genre Oxyanthus (Rubiaceae) en Afrique de l{\textquoteright}Ouest: description d{\textquoteright}une nouvelle esp{\`e}ce.}, journal = {Candollea}, volume = {70}, year = {2015}, pages = {241-247}, chapter = {241}, abstract = {

A new species, Oxyanthus andjigae Sonk\é \& O. Lachenaud (Rubiaceae), from Ivory Coast and Sierra Leone, is described
and illustrated. It is closely related to Oxyanthus racemosus (Schumach. \& Thonn.) Keay and Oxyanthus setosus Keay, and
was previously confused with the latter species; however, it differs from both in the longer corolla tube (18-19.5 cm vs
(7-)11-15.5 cm) and the longer hairs on the twigs (1.5-2 mm long vs. \≤ 1 mm in Oxyanthus setosus and \≤ 0.5 mm in
Oxyanthus racemosus). From Oxyanthus setosus it is also separated by the distribution, the latter species occuring from
Nigeria to Gabon. The species is assessed as \“Endangered\” following IUCN Categories and Criteria. A new identification
key to West African species of Oxyanthus DC. is presented; Oxyanthus oliganthus K. Schum. is newly reported from
C\ôte d\’Ivoire and Ghana.

}, doi = {dx.doi.org/10.15553/c2015v702a10.}, author = {Olivier Lachenaud and Bonaventure Sonk{\'e}} } @article {82, title = {Four new species of Sabicea (Rubiaceae) from tropical Africa, with additional notes on the genus. }, journal = {Candollea}, volume = {73}, year = {2018}, month = {23 November 2018}, pages = {277-293}, chapter = {277}, abstract = {

Four new species of Sabicea (Rubiaceae) from tropical Africa are described and illustrated: S. desseinii from Cameroon, Gabon and Equatorial Guinea, S. ezangae from Gabon, S. jongkindii from Liberia and Ghana, and S. uniflora from Gabon. Their affinities are discussed, and the conservation status of each species is assessed. Sabicea speciosissima K.Schum. is excluded from the genus and synonymised with Rothmannia octomera (Hook.) Fagerl. Three other species are sunk into synonymy: Sabicea gigantea Wernham with S. dewevrei De Wild., S. arachnoidea Hutch. \& Dalziel with S. discolor Stapf, and S. neglecta Hepper with S. speciosa K.Schum.

}, keywords = {Africa, Cameroon, Equatorial Guinea, Gabon, Ghana, Liberia, new species, Rubiaceae, Sabicea, taxonomy}, author = {Lise Zemagho and Olivier Lachenaud and Bonaventure Sonk{\'e}} }