Un nouveau Psychotria (Rubiaceae) du sud Cameroun
A new species of Psychotria (Rubiaceae) from southern Cameroon

Authors: Lachenaud, Olivier; Séné, Olivier

Source: Plant Ecology and Evolution, Volume 143, Number 1, March 2010 , pp. 105-118(14)

Publisher: National Botanic Garden of Belgium and Royal Botanical Society of Belgium

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Abstract:

Background - A novelty is described in the framework of an ongoing revision of Psychotria in West and Central Africa.

Methods - Normal practises of herbarium taxonomy have been applied.

Key results - Psychotria sonkeana O.Lachenaud & Séné, a new species endemic to southern Cameroon, is described and illustrated. Belonging to section Confertiflorae, it is related to P. subobliqua Hiern and P. globiceps Hiern, but differs from both in having fistulose branches, puberulent peduncles and green-and-white-striped immature fruits. The species is assessed to be Endangered according to the IUCN criteria.

French

Contexte - Une nouvelle espèce est décrite dans le cadre d'une révision en cours des Psychotria en Afrique occidentale et centrale.

Méthodes - Les méthodes usuelles de taxonomie d'herbier ont été appliquées.

Résultats-clés - Psychotria sonkeana O.Lachenaud & Séné, espèce nouvelle endémique du sud Cameroun, est décrit et illustré. Appartenant à la section Confertiflorae, il est voisin de P. subobliqua Hiern et P. globiceps Hiern, dont il diffère notamment par les rameaux fistuleux, les pédoncules pubérulents et les fruits striés de vert et de blanc à l'état immature. L'espèce est évaluée comme « En danger » selon les critères de l'UICN.

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Keywords: Rubiaceae; Psychotria; Cameroon; conservation; taxonomy

Document Type: Research article

DOI: http://dx.doi.org/10.5091/plecevo.2010.371

Publication date: 2010-03-01

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Plant Ecology and Evolution (a continuation of Belgian Journal of Botany, incorporating Systematics and Geography of Plants) is an international journal devoted to ecology, phylogenetics and systematics of all 'plant' groups in the traditional sense (including algae, cyanobacteria, fungi, myxomycetes), also covering related fields such as comparative and developmental morphology, conservation biology, ecophysiology, evolution, phytogeography, pollen and spores, population biology, and vegetation studies. It contains original research papers, review articles, short communications and book reviews.
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