02028nas a2200133 4500008004100000245007400041210007000115300000700185490000700192520153200199100002401731700001701755856012201772 2005 eng d00aRévision du genre africain Sherbournia G.Don (Rubiaceae, Gardenieae)0 aRévision du genre africain Sherbournia GDon Rubiaceae Gardenieae a910 v753 a

Revision of the African genus Sherbournia (Rubiaceae, Gardenieae). A revision of Sherbournia G.Don is given, based mainly on a study of the herbarium specimens at BATA, BM, BR, BRLU, K, LBV, MO, P, SCA, WAG and YA. The general part gives a survey of the history of the genus; the morphological features (habit, leaves, stipules, domatia, flower, fruit characters) of the genus are reviewed and documented. The distribution maps of the species show the characteristic distribution pattern of a strict Guineo-Congolian genus. The taxonomic part gives keys and complete species treatments (synonymies, descriptions, distributional data, critical notes). The detailed examination of the specimens resulted in one novelty: Sherbournia batesii subsp. kivuensis Pauwels & Sonké. Some taxonomic changes are made: Sherbournia streptocaulon (K.Schum.) Hepper var. situtunga N.Hallé is proved to be synonymous with Sherbournia streptocaulon (K.Schum.) Hepper; Sherbournia bignoniiflora (Welw.) Hua var. brazzaei N.Hallé, Amaralia palustris Wernh., Amaralia ekotokicola Wernh. are synonymous with Sherbournia bignoniiflora (Welw.) Hua. The subdivison of S. hapalophylla is reconsidered and two subspecies are proposed: S. hapalophylla subsp. hapalophylla and S. hapalophylla subsp. wernhamiana. According to those changes, S. hapalophylla (Wernham) Hepper var. henrihuana N.Hallé and S. hapalophylla (Wernham) Hepper var. hapalophylla are put into synonymy with S. hapalophylla subsp. hapalophylla.

1 aSonké, Bonaventure1 aPauwels, Luc uhttps://rubiaceae-africa.myspecies.info/content/r%C3%A9vision-du-genre-africain-sherbournia-gdon-rubiaceae-gardenieae00783nas a2200157 4500008004100000020001400041245008700055210006900142300001200211490000700223520028400230100002400514700001800538700001700556856005200573 2005 eng d a0075-597400aA new species of Aulacocalyx (Rubiaceae, Gardenieae) from southern Cameroon0 anew species of iAulacocalyxi Rubiaceae Gardenieae from southern  a301-3040 v603 a

Aulacocalyx camerooniana is described as a new species from Engon, (S Efoulan) in southern Cameroon. Its diagnostic characteristics are elucidated, notes on its conservation status are given and an updated key to species of Aulacocalyx occurring in Cameroon is provided.

1 aSonké, Bonaventure1 aDawson, Sally1 aBeina, Denis uhttps://rubiaceae-africa.myspecies.info/node/4501685nas a2200421 4500008004400000020001400044245012400058210006900182300001200251490000700263520050100270653001800771653001100789653002700800653001600827653001300843653001900856653001200875653002500887653001700912653002200929653001500951653002300966653001100989653003001000653001601030653001101046653001101057653001401068653001301082653001801095653003201113100001501145700001401160700002101174700001601195856005201211 2005 Frendh  a1280-857100aA new species of Bertiera Aubl. (Rubiaceae) in subgenus Bertierella discovered in Equatorial Guinea and Cameroon0 anew species of iBertierai Aubl Rubiaceae in subgenus Bertierella a309-3150 v273 a

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.

10aACP Countries10aAfrica10aAfrica South of Sahara10aangiosperms10aCameroon10aCentral Africa10acorolla10aDeveloping Countries10adicotyledons10aEquatorial Guinea10aeukaryotes10aFrancophone Africa10afruits10aLeast Developed Countries10anew species10apetals10aplants10aRubiaceae10aRubiales10aSpermatophyta10aZZ380Taxonomy and Evolution1 aSonké, B.1 aEsono, P.1 aNguembou, K., C.1 aStevart, T. uhttps://rubiaceae-africa.myspecies.info/node/4901173nas a2200133 4500008004100000020001400041245008500055210006900140300001100209490000800220520074000228100001900968856005200987 2005 eng d a0024-407400aThe Rubiaceae of Sao Tome e Principe (Gulf of Guinea): taxonomy and conservation0 aRubiaceae of Sao Tome e Principe Gulf of Guinea taxonomy and con a85-1140 v1493 a

A synoptic treatment of the Rubiaceae of Sao Tome e Principe (Gulf of Guinea) is presented based on herbarium collections kept at BM, COI, K and LISC. There are 36 genera and 64 species of Rubiaceae represented in the flora of Sao Tome e Principe. Identification keys are provided for genera, species and infraspecific taxa. A new combination is made in Chassalia. Twenty-nine taxa are endemic to these islands, two of which are also endemic to Annobon. The conservation status of the endemic taxa is assessed and IUCN categories of threat are proposed for ten taxa. Nineteen taxa of Rubiaceae are considered under threat in Sao Tome e Principe and ten are considered nearly threatened. (c) 2005 The Linnean Society of London.

1 aFigueiredo, E. uhttps://rubiaceae-africa.myspecies.info/node/1802882nas a2200169 4500008004100000020001400041245009100055210006900146300001200215490000700227520235400234653001902588100001902607700001602626700001802642856005202660 2005 eng d a0305-027000aThe inselberg flora of Atlantic Central Africa. I. Determinants of species assemblages0 ainselberg flora of Atlantic Central Africa I Determinants of spe a685-6960 v323 a

Aims To identify the relative contributions of environmental determinism, dispersal limitation and historical factors in the spatial structure of the floristic data of inselbergs at the local and regional scales, and to test if the extent of species spatial aggregation is related to dispersal abilities. Location Rain forest inselbergs of Equatorial Guinea, northern Gabon and southern Cameroon (western central Africa). Methods We use phytosociological releves and herbarium collections obtained from 27 inselbergs using a stratified sampling scheme considering six plant formations. Data analysis focused on Rubiaceae, Orchidaceae, Melastomataceae, Poaceae, Commelinaceae, Acanthaceae, Begoniaceae and Pteridophytes. Data were investigated using ordination methods (detrended correspondence analysis, DCA; canonical correspondence analysis, CCA), Sorensen's coefficient of similarity and spatial autocorrelation statistics. Comparisons were made at the local and regional scales using ordinations of life-form spectra and ordinations of species data. Results At the local scale, the forest-inselberg ecotone is the main gradient structuring the floristic data. At the regional scale, this is still the main gradient in the ordination of life-form spectra, but other factors become predominant in analyses of species assemblages. CCA identified three environmental variables explaining a significant part of the variation in floristic data. Spatial autocorrelation analyses showed that both the flora and the environmental factors are spatially autocorrelated: the similarity of species compositions within plant formations decreasing approximately linearly with the logarithm of the spatial distance. The extent of species distribution was correlated with their a priori dispersal abilities as assessed by their diaspore types. Main conclusions At a local scale, species composition is best explained by a continuous cline of edaphic conditions along the forest-inselberg ecotone, generating a wide array of ecological niches. At a regional scale, these ecological niches are occupied by different species depending on the available local species pool. These subregional species pools probably result from varying environmental conditions, dispersal limitation and the history of past vegetation changes due to climatic fluctuations.

10aOrchids Africa1 aParmentier, I.1 aStevart, T.1 aHardy, O., J. uhttps://rubiaceae-africa.myspecies.info/node/3200893nas a2200145 4500008004100000020001400041245007600055210006900131300001200200490000700212520043500219100001800654700002400672856005100696 2005 eng d a0075-597400aTwo further new species of Psychotria (Rubiaceae) from western Cameroon0 aTwo further new species of Psychotria Rubiaceae from western Cam a293-3000 v603 a

Two new species of Psychotria (Rubiaceae) from western Cameroon are described and illustrated, their conservation status assessed and their taxonomic affinities discussed. Both species were discovered in Kupe and the Bakossi Mts. Psychotria geophylax Check & Sonke has affinities with sect. Flaviflorae E. M. A. Petit, whereas P bakossiensis Cheek & Sonke falls near sect. Involucratae E. M. A. Petit & Verdc.

1 aCheek, Martin1 aSonké, Bonaventure uhttps://rubiaceae-africa.myspecies.info/node/8