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Zemagho Mbouzang, Lise Arlette ; Liede-Schumann, Sigrid ; Lachenaud, Olivier ; Dessein, Steven ; Sonké, Bonaventure:
Taxonomic revision of Sabicea subgenus Anisophyllae (Ixoroideae, Rubiaceae) from Tropical Africa, with four new species.
In: Phytotaxa.
Bd. 293
(2017)
Heft 1
.
- S. 1-68.
ISSN 1179-3155
DOI: https://doi.org/10.11646/phytotaxa.293.1.1
Abstract
A taxonomic revision of Sabicea subgenus Anisophyllae (Rubiaceae), a group restricted to Central and East Africa, is presented here. This work, based on a study of herbarium specimens and field observations in Cameroon and Gabon,includes a survey of the morphological features of the group, a key to the species, descriptions of all the taxa, and IUCN conservation status assessments. Fifteen species are recognised, four of which are described as new (Sabicea mapiana , S. ndjoleensis , S. parmentierae , S. sciaphilantha ), three former varieties are raised to species rank (S. crystallina , S.jacfelicis , S. tersifolia ), and one species previously sunk into synonymy is restored (S. bequaertii ). Two new infraspecific taxa are also described, Sabicea crystallina subsp. engongensis and S. sciaphilantha subsp. hirsuta . The group has its center of diversity in Gabon, where 10 of the 15 species occur, three of them being endemic to the country.