@article {43, title = {A new species of Aulacocalyx (Rubiaceae, Aulacocalyceae) from south-western Cameroon}, journal = {Systematics and Geography of Plants}, volume = {71}, number = {1}, year = {2001}, note = {Times Cited: 0}, pages = {17-23}, abstract = {

Aulacocalyx mapiana is described as a new species from Banyang Mbo, south-western Cameroon. Its relationship within the genus is discussed and a key is provided to all four species occurring in Cameroon.

}, isbn = {1374-7886}, author = {Sonk{\'e}, B. and Bridson, D. M.} } @article {46, title = {A new species of Colletoecema (Rubiaceae) from southern Cameroon with a discussion of relationships among basal Rubioideae}, journal = {Blumea}, volume = {53}, number = {3}, year = {2008}, note = {Times Cited: 0}, pages = {533-547}, abstract = {

Colletoecema magna, a new species from the Ngovayang Massif (southern Cameroon) is described and illustrated. A comparative morphological study illustrates the similar placentation and fruit anatomy of the novelty and Colletoecema dewevrei, the only other species of the genus. Colletoecema magna essentially differs from C. dewevrei by its sessile flowers and fruits, the corolla tube that is densely hairy above the insertion point of the stamens and the anthers that are included. Further characters that separate the novelty are its larger leaves, more condensed inflorescences, and larger fruits. Its position within Colletoecema is corroborated by atpB-rbcL and rbcL chloroplast sequences. The relationships among the basal lineages of the subfamily Rubioideae, to which Colletoecema belongs, are briefly addressed. Based on Our present knowledge, a paleotropical or tropical African origin of the Rubioideae is hypothesized.

}, isbn = {0006-5196}, author = {Sonk{\'e}, B. and Dessein, S. and Taedoumg, H. and Groeninckx, I. and Robbrecht, E.} } @proceedings {47, title = {Apport des inventaires des Orchidaceae et des Rubiaceae dans l{\textquoteright}identification des Zones d{\textquoteright}Importance pour la COnservation (ZICO) au Cameroun}, year = {2009}, note = {Talk}, month = {27/03/2009}, pages = {31-34}, address = {VUB-ULB, Brussels}, keywords = {Orchids Africa}, author = {Sonk{\'e}, B. and Droissart, V. and Stevart, T.}, editor = {Dahdouh-Guebas, F. and Barbier, N. and Bogaert, J. and Hardy, O. and Koedam, N. and Mahy, G. and Parmentier, I. and Schmitz, N. and Stevart, T. and Triest, L. and Meerts, P.} } @conference {48, title = {A new specimen database for Atlantic Central Africa (1): using Orchidaceae and Rubiaceae to boost conservation assessment process in the sub-region}, booktitle = {XIXth AETFAT Congress}, year = {2010}, note = {Poster}, month = {April 26 - 30, 2010}, publisher = {Scripta Botanica Belgica 46}, organization = {Scripta Botanica Belgica 46}, type = {Poster}, address = {Antananarivo, Madagascar}, abstract = {462}, keywords = {Orchids Africa}, author = {Sonk{\'e}, B. and Droissart, V. and Stevart, T.} } @article {49, title = {A new species of Bertiera Aubl. (Rubiaceae) in subgenus Bertierella discovered in Equatorial Guinea and Cameroon}, journal = {Adansonia}, volume = {27}, number = {2}, year = {2005}, note = {Cited Reference Count: 14 ref.EnglishUne nouvelle espece de Bertiera Aubl. (Rubiaceae) du sous-genre Bertierella decouverte en Guinee Equatoriale et au Cameroun.}, pages = {309-315}, type = {article}, abstract = {

A new species of Bertiera (Rubiaceae) from Equatorial Guinea and Cameroon, Bertiera rosseeliana Sonkd, Esono \& Nguembou, is described and illustrated here. This new species belongs to subgenus Bertierella and appears to be closely related to Bertiera naucleoides. It differs from this species, however, by the features stated in the diagnosis: glabrous leaf blade (not puberulous); calyx lobes shorter (2-3 not 7-8 mm); corolla tube longer (18-20 not 5-6 mm); fruits without pedicel.

}, keywords = {ACP Countries, Africa, Africa South of Sahara, angiosperms, Cameroon, Central Africa, corolla, Developing Countries, dicotyledons, Equatorial Guinea, eukaryotes, Francophone Africa, fruits, Least Developed Countries, new species, petals, plants, Rubiaceae, Rubiales, Spermatophyta, ZZ380Taxonomy and Evolution}, isbn = {1280-8571}, author = {Sonk{\'e}, B. and Esono, P. and Nguembou, K. C. and Stevart, T.} } @article {50, title = {Calycosiphonia pentamera sp nov (afrotropical Rubiaceae) from the {\textquoteright}Lower Guinea{\textquoteright} area}, journal = {Nordic Journal of Botany}, volume = {25}, number = {5-6}, year = {2007}, note = {Times Cited: 0}, pages = {275-280}, abstract = {

A distinctive new species of Calycosiphonia (Rubiaceae) is described and illustrated. It is endemic to the Lower Guinea Domain of the Guineo-Congolian Region, where it is restricted to south Cameroon and Monte Alen National Park (Equatorial Guinea). Its conservation status is assessed as Vulnerable according to the Red list criteria of IUCN. Calycosiphonia pentamera sp. nov. is the third species known from the genus. Molecular data have recently shown that the genera Calycosiphonia and Argocoffeopis form a single clade, but leave some open questions on how to distinguish and delimit the two genera. In the present state of knowledge, the novelty should be placed in Calycosiphonia based on morphological evidence: shrubs with large leaves becoming blackish in the dried state, inflorescences axillary and paired at the nodes, and fruits exceeding 15 mm in diameter. The 5-merous condition of the flowers and the presence of standard anthers (without transverse septa in the thecae) in C. pentamera are features not previously recorded from the genus. They require a better understanding in the framework of a more robust Molecular phylogeny, allowing character analysis of the Calycosiphonial/Argocoffeopsis clade.

}, isbn = {0107-055X}, author = {Sonk{\'e}, B. and Marie-Noel, D. K. and Robbrecht, E.} } @article {51, title = {An extraordinary new rheophyte in the genus Leptactina (Rubiaceae, Pavetteae) from Rio Muni (Equatorial Guinea)}, journal = {Botanical Journal of the Linnean Society}, volume = {153}, number = {2}, year = {2007}, note = {Times Cited: 0}, pages = {109-113}, abstract = {

A distinctive new species of Rubiaceae from Rio Muni, Equatorial Guinea, is described and illustrated. Leptactina rheophytica is the only rheophyte known in the genus. Its diagnostic characters are elucidated, its taxonomic affinities are discussed, and notes on its conservation status are provided. (c) 2007 The Linnean Society of London.

}, isbn = {0024-4074}, author = {Sonk{\'e}, B. and Neuba, D. and Kenfack, D. and De Block, P.} } @article {52, title = {A new dwarf Coffea (Rubiaceae) from southern Cameroon}, journal = {Botanical Journal of the Linnean Society}, volume = {151}, number = {3}, year = {2006}, note = {Times Cited: 7}, pages = {425-430}, abstract = {

A distinctive new species of dwarf monocaulous Coffea (Rubiaceae) from Cameroon is described and illustrated. Coffea mapiana is the second dwarf monocaulous known from Cameroon. Its diagnostic characters are elucidated and its taxonomic affinities are discussed; a conservation assessment is provided. (c) 2006 The Linnean Society of London, Botanical Journal of the Linnean Society, 2006, 151, 425-430.

}, isbn = {0024-4074}, author = {Sonk{\'e}, B. and Nguembou, K. C. and Davis, A. P.} } @inbook {53, title = {Les Rubiaceae end{\'e}miques du Cameroun et leur statut de conservation}, booktitle = {Taxonomy and ecology of African plants, their conservation and uses. Proceedings du XVII{\`e}me Congr{\`e}s de l{\textquoteright}Aetfat}, year = {2006}, pages = {97-109}, publisher = {Royal Botanic Garden Kew}, organization = {Royal Botanic Garden Kew}, address = {London}, author = {Sonk{\'e}, B. and Nguembou, K.C. and Neuba, D.}, editor = {Ghazanfar, S.A. and Beentje, H.J.} } @article {54, title = {Synopsis of the genus Mitriostigma (Rubiaceae) with a new monocaulous species from Southern Cameroon}, journal = {Nordic Journal of Botany}, volume = {27}, number = {4}, year = {2009}, pages = {305-312}, chapter = {305}, author = {Sonk{\'e}, B. and Simo, M. and Dessein, S.} } @article {55, title = {Systematic revision of the genus Rothmannia (Rubiaceae-Gardenieae) in Cameroon}, journal = {Bulletin du Jardin Botanique National de Belgique}, volume = {65}, number = {1-2}, year = {1996}, note = {Times Cited: 0}, pages = {219-247}, abstract = {

A revision is made of the Rothmannia material from Cameroun at BR, BRLU, P and YA. Eleven species are reported from the country. A short general part informs on the history of the genus and on phenological data. The taxonomic part contains descriptions, ecological and chorological data (with a map of the reported distribution of each species in Cameroun) and, for a few species, critical remarks.

}, isbn = {0303-9153}, author = {Sonk{\'e}, B. and Simo-K, A.} } @article {14, title = {Subsampling Herbarium Collections to Assess Geographic Diversity Gradients: A Case-Study with endemic Orchidaceae and Rubiaceae in Cameroon}, journal = {Biotropica}, volume = {44}, number = {1}, year = {2012}, pages = {44-52}, keywords = {Orchids Africa}, author = {Droissart, V. and Hardy, O. and Sonk{\'e}, B. and Dahdouh-Guebas, F. and Stevart, T.} } @conference {15, title = {Contribution des Orchidaceae et des Rubiaceae end{\'e}miques d{\textquoteright}Afrique centrale atlantique {\`a} l{\textquoteright}{\'e}tude phytog{\'e}ographique du Cameroun}, booktitle = {XVIII{\`e}me congr{\`e}s de l{\textquoteright}AETFAT}, year = {2007}, note = {Talk}, month = {26 February {\textendash} 2 March 2007}, type = {Talk}, address = {Yaound{\'e}, Cameroon}, keywords = {Orchids Africa}, author = {Droissart, V. and Nguembou, C. and Sonk{\'e}, B. and Stevart, T.} } @conference {16, title = {A new specimen database for Atlantic Central Africa (2): using Orchidaceae and Rubiaceae to explore endemism patterns in the sub-region }, booktitle = {XIXth AETFAT Congress}, year = {2010}, note = {talk}, month = {April 26 - 30, 2010}, publisher = {Scripta Botanica Belgica 46}, organization = {Scripta Botanica Belgica 46}, type = {Talk}, address = {Antananarivo, Madagascar}, abstract = {155}, keywords = {Orchids Africa}, author = {Droissart, V. and Sonk{\'e}, B. and Hardy, O. and Couteron, P. and St{\'e}vart, T} } @article {17, title = {Do plant families with contrasting functional traits show similar patterns of endemism? A case study with Central African Orchidaceae and Rubiaceae}, journal = {Biodiversity and Conservation}, volume = {20}, number = {7}, year = {2011}, pages = {1507-1531}, keywords = {Orchids Africa}, author = {Droissart, V. and Sonk{\'e}, B. and Hardy, O. J. and Simo, M. and Taedoumg, H. and Nguembou, K. C. and Stevart, T.} } @article {19, title = {World Checklist of Rubiaceae}, year = {2012}, month = {1 Octobre 2012}, publisher = {The Board of Trustees of the Royal Botanic Gardens, Kew}, author = {Govaerts, R. and Ruhsam, M. and Andersson, L. and Robbrecht, E. and Bridson, D. and Davis, A. and Schanzer, I. and Sonk{\'e}, B.} } @article {26, title = {A new Leptactina (Rubiaceae, Pavetteae) from Central African Republic: Leptactina deblockiae}, journal = {Adansonia}, volume = {28}, number = {2}, year = {2006}, note = {Times Cited: 0}, pages = {373-378}, abstract = {

A new species of Leptactina (Rubiaceae) with axillary inflorescences, gibbous stipules and fruits ellipsoid from Cenral African Republic, L. deblockiae Neuba \& Sonke, is described and illustrated here. Affinities of this new taxon with other species of Leptactina is discussed.. A key of Leptactina species with axillary inflorescences is provided.

}, isbn = {1280-8571}, author = {Neuba, D. F. R. and Lejoly, J. and Sonk{\'e}, B.} } @conference {27, title = {Distribution des Rubiaceae end{\'e}miques du Cameroun}, booktitle = {Abstract du XVIII{\`e}me congr{\`e}s de l{\textquoteright}AETFAT}, year = {2007}, note = {Poster}, month = {26 February {\textendash} 2 March 2007}, type = {Talk}, address = {Yaound{\'e}, Cameroon}, author = {Nguembou, C. and Droissart, V. and Stevart, T. and Sonk{\'e}, B.} } @article {42, title = {A new species of Rothmannia (Rubiaceae, Gardenieae) from Banyang Mbo (Cameroon)}, journal = {Systematics and Geography of Plants}, volume = {70}, number = {1}, year = {2000}, note = {Times Cited: 0}, pages = {149-153}, abstract = {

A new Rothmannia species (Rubiaceae-Gardenieae-Gardeniinae) named Rothmannia ebamutensis found in Banyang Mbo (Cameroon) is described. This species is characterized by its fruit with ten small ribs and covered with small white lenticels. The pedicel of the flower is 50-60 mm long. The species is limited to the submontane rain forest at the south-western part of Cameroon.

}, isbn = {1374-7886}, author = {Sonk{\'e}, B.} } @article {7, title = {Psydrax bridsoniana (Rubiaceae), a new species of tree from western Cameroon}, journal = {Kew Bulletin}, volume = {59}, number = {4}, year = {2004}, note = {Times Cited: 0}, pages = {605-608}, chapter = {605}, abstract = {

species of tree 12-20 m tall from western Cameroon is described. Its conservation status and taxonomic placement are discussed.

}, isbn = {0075-5974}, author = {Cheek, M. and Sonk{\'e}, B.} } @article {9, title = {A new species of Oxyanthus (Rubiaceae-Gardeniinae) from western Cameroon}, journal = {Kew Bulletin}, volume = {55}, number = {4}, year = {2000}, pages = {889-893}, chapter = {889}, author = {Cheek, M. and Sonk{\'e}, B.} }