01541nas a2200181 4500008004100000020001400041245013400055210006900189300001200258490000700270520094500277100001501222700001601237700001701253700001901270700001801289856005201307 2008 eng d a0006-519600aA new species of Colletoecema (Rubiaceae) from southern Cameroon with a discussion of relationships among basal Rubioideae0 anew species of iColletoecemai Rubiaceae from southern Cameroon w a533-5470 v533 a

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.

1 aSonké, B.1 aDessein, S.1 aTaedoumg, H.1 aGroeninckx, I.1 aRobbrecht, E. uhttps://rubiaceae-africa.myspecies.info/node/4600471nas a2200133 4500008004100000245011200041210006900153300001200222490000700234100001500241700001300256700001600269856005200285 2009 eng d00aSynopsis of the genus Mitriostigma (Rubiaceae) with a new monocaulous species from Southern Cameroon0 aSynopsis of the genus iMitriostigmai Rubiaceae with a new monoca a305-3120 v271 aSonké, B.1 aSimo, M.1 aDessein, S. uhttps://rubiaceae-africa.myspecies.info/node/5401821nas a2200169 4500008004100000020001400041245009000055210006900145300001200214490000800226520130000234100001401534700001801548700001701566700001601583856005201599 2009 eng d a0778-403100aFour New Pauridiantha Species (Rubiaceae) Reflect the Richness of Gabon's Rainforests0 aFour New Pauridiantha Species Rubiaceae Reflect the Richness of  a177-1930 v1423 a

Four new Pauridiantha species are described and illustrated. Pauridiantha longistipula Ntore & Dessein is found in the northern part of the Crystal Mountains of Gabon and the neighboring region of Equatorial Guinea, and is easily characterized by its very long stipules. Pauridantha barbata Ntore & Dessein, collected from the southern sector of the Moukalaba-Doudou National Park in Gabon and the Kouilou department in the Republic of the Congo, resembles P. mayumbensis, but differs inter alia in the absence of leaf domatia and barbate corolla buds. The two other new species are endemic to Gabon. Pauridiantha triflora Ntore & Dessein, from the Doudou Mountains and the Chaillu Massif, is somewhat similar to P. smetsiana, but differs in the hairy stems, leaves and inflorescences, the smaller green-drying leaves and the narrowly triangular stipules. Pauridiantha uniflora Ntore & Dessein, only known from the Crystal Mountains area, is easily confused with P. talbotii, but differs in the smaller, ovate leaves with short acumen, the less ascending secondary veins, and the mid-vein hairy above. Apart from the descriptions, a key to all Pauridiantha species from Gabon is provided and a conservation status of the new species following the IUCN criteria is given.

1 aNtore, S.1 aLachenaud, O.1 aJanssens, S.1 aDessein, S. uhttps://rubiaceae-africa.myspecies.info/node/31