@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.} } @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 {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 {36, title = {Tropical woody Rubiaceae. Characteristic features and progressions. Contributions to a new subfamilial classification}, journal = {Opera Botanica Belgica}, volume = {1}, year = {1988}, pages = {1-271}, author = {Robbrecht, E.} } @inbook {37, title = {Geography of African Rubiaceae with reference to glacial rain forest refuges}, booktitle = {The biodiversity of African plants: Proceedings XIVth AETFAT congress}, year = {1996}, pages = {564-581}, publisher = {Kluwer Academic Publishers}, organization = {Kluwer Academic Publishers}, address = {Netherlands}, author = {Robbrecht, E.}, editor = {van der Maesen, L.J.G. and van der Burgt, X.M. and van Medenbach de Rooy, J.M.} } @article {38, title = {The major evolutionary lineages of the coffee family (Rubiaceae, angiosperms). Combined analysis (nDNA and cpDNA) to infer the position of Coptosapelta and Luculia, and supertree construction based on rbcL, rps16, trnL-trnF<}, journal = {Systematics and Geography of Plants}, volume = {76}, year = {2006}, pages = {85-145}, isbn = {1374-7886}, author = {Robbrecht, E. and Manen, J.F.} }