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1 December 2015 Le genre Oxyanthus DC. (Rubiaceae) en Afrique de l'Ouest: Description D'une Nouvelle Espèce
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Abstract

Lachenaud, O. & B. Sonké (2015). The genus Oxyanthus DC. (Rubiaceae) in West Africa: description of a new species. Candollea 70: 241–247. In French, English and French abstracts. DOI: http://dx.doi.org/10.15553/c2015v702a10

A new species, Oxyanthus andjigae Sonké & 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 Côte d'Ivoire and Ghana.

© CONSERVATOIRE ET JARDIN BOTANIQUES DE GENèVE 2015
Olivier Lachenaud & and Bonaventure Sonké "Le genre Oxyanthus DC. (Rubiaceae) en Afrique de l'Ouest: Description D'une Nouvelle Espèce," Candollea 70(2), 241-247, (1 December 2015). https://doi.org/10.15553/c2015v702a10
Received: 26 June 2015; Accepted: 1 September 2015; Published: 1 December 2015
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