Zemagho, L; Liede-Schumann, S; Lachenaud, O; Dessein, S; Sonké, B: Taxonomic revision of Sabicea subgenus Anisophyllae (Ixoroideae, Rubiaceae) from Tropical Africa, with four new species, Phytotaxa, 293, 1-68 (2017), doi:http://dx.doi.org/10.11646/phytotaxa.293.1.1
Stichworte: Conservation status, Guineo-Congolian Region, IUCN Red List Categories and Criteria, Lower Guinea, taxonomy, Rubiaceae, Sabicea, tropical African flora
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.
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