01779nas a2200145 4500008004100000245011000041210006900151490000700220520104800227653015401275100002301429700001801452700002401470856013901494 2020 eng d00aA synopsis of the Sabicea floribunda group (Rubiaceae) from Central Africa, including three new species.0 asynopsis of the Sabicea floribunda group Rubiaceae from Central 0 v753 a

This paper presents a taxonomic revision of the Sabicea floribunda K. Schum. group. Eight species are recognised, of which three are newly described: Sabicea couteronii O. Lachenaud, Zemagho & Sonké (Cameroon, Gabon and Republic of Congo), Sabicea dichrosepala O. Lachenaud, Zemagho & Sonké and Sabicea rubiginosa O. Lachenaud, Zemagho & Sonké (both endemic to Gabon). One subspecies is also described: Sabicea sanguinosa subsp. viridis O. Lachenaud, Zemagho & Sonké and two varieties: Sabicea floribunda var. anisostegia O. Lachenaud, Zemagho & Sonké and Sabicea floribunda var. paludosa O. Lachenaud, Zemagho & Sonké. Lectotypes are selected for Sabicea floribunda var. paucinervis Wernham, Sabicea nobilis R.D. Good, Sabicea segregata Hiern and Sabicea henningsiana Büttner. All species are illustrated with photographs, and the three new ones also with line drawings; distribution maps and IUCN conservation status assessments are also presented for all taxa.

10aRUBIACEAE – Sabicea – Pseudosabicea – Central Africa – Lower Guinea – Gabon –Cameroon – Republic of Congo – Taxonomy – New species.1 aLachenaud, Olivier1 aZemagho, Lise1 aSonké, Bonaventure uhttps://rubiaceae-africa.myspecies.info/content/synopsis-sabicea-floribunda-group-rubiaceae-central-africa-including-three-new-species01775nas a2200217 4500008004100000245004200041210004000083260001600123300001100139490000800150520118400158653001301342653001701355653001701372653001401389653002401403100001701427700001501444700001601459856008201475 2019 eng d00aA checklist of rheophytes of Cameroon0 achecklist of rheophytes of Cameroon c09 May 2019 a81-1310 v1213 a

Rivers in Cameroon were surveyed to collect and document rheophytic plants. Rheophytes are the dominant aquatic macrophytes in tropical river systems, where they are adapted to extreme environments of rushing water (e.g., river rapids, waterfalls and flash floods). Rheophytic plants are useful indicators of river health. However, their habitats are threatened by human activities such as agriculture, plantation development, alluvial mining and dam construction, particularly in tropical countries. In this survey we documented 66 rheophytic species in 29 genera and 16 families. Two ferns, 8 monocotyledons and 56 dicotyledons were listed. Apart from the Podostemaceae family in which all species are rheophytic, the other 15 families have few species which are rheophytic. Five of these families have up to four species and the remaining 10 have only one member as a rheophytic species. The conservation status of each species is assessed and discussed. This work urges botanists, conservationists, and policy makers to do more to protect the habitats of rheophytes and put in place strategies and action plans for the conservation of this important biological group

10aCameroon10aconservation10adistribution10ainventory10aRheophyte diversity1 aKuetegue, F.1 aSonké, B.1 aAmeka, G.K. uhttps://rubiaceae-africa.myspecies.info/content/checklist-rheophytes-cameroon01800nas a2200325 4500008004100000245007800041210006900119260001500188300000800203490000600211520078700217100002001004700002001024700001901044700002701063700002001090700002201110700001901132700002401151700002101175700002201196700002001218700001901238700002101257700001701278700001801295700002301313700002001336856011801356 2019 eng d00aYam genomics supports West Africa as a major cradle of crop domestication0 aYam genomics supports West Africa as a major cradle of crop dome c1 May 2019 a1-80 v53 a

While there has been progress in our understanding of the origin and history of agriculture in sub-Saharan Africa,
a unified perspective is still lacking on where and how major crops were domesticated in the region. Here, we
investigated the domestication of African yam (Dioscorea rotundata), a key crop in early African agriculture. Using
whole-genome resequencing and statistical models, we show that cultivated yam was domesticated from a forest
species. We infer that the expansion of African yam agriculture started in the Niger River basin. This result, alongside
with the origins of African rice and pearl millet, supports the hypothesis that the vicinity of the Niger River
was a major cradle of African agriculture.

1 aScarcelli, Nora1 aCubry, Philippe1 aAkakpo, Roland1 aThuillet, Anne-Céline1 aObidiegwu, Jude1 aBaco, Mohamed, N.1 aOtoo, Emmanuel1 aSonké, Bonaventure1 aDansi, Alexandre1 aDjedatin, Gustave1 aMariac, Cédric1 aCouderc, Marie1 aCausse, Sandrine1 aAlix, Karine1 aChaïr, Hâna1 aFrançois, Olivier1 aVigouroux, Yves uhttps://rubiaceae-africa.myspecies.info/content/yam-genomics-supports-west-africa-major-cradle-crop-domestication01728nas a2200169 4500008004100000245014500041210007100186300001200257490000800269520102800277100002301305700002301328700001601351700001601367700002401383856015101407 2013 eng d00aTaxonomy and phylogenetics of Cuviera (Rubiaceae–Vanguerieae) and reinstatement of Globulostylis with the description of three new species0 aTaxonomy and phylogenetics of Cuviera Rubiaceae–Vanguerieae and  a407-4410 v1733 a

Generic circumscriptions in tribe Vanguerieae (Rubiaceae) have been under discussion for a long time. Recent
molecular studies, while providing new insights, have not yet solved all the problems. In this study, the taxonomy
and phylogenetics of the genus Cuviera s.l. are investigated. On the basis of molecular and morphological evidence,
Cuviera is restricted to a group of ten West and Central African species. Globulostylis, previously included in
Cuviera, is reinstated as a distinct genus, with eight species from Central Africa. Both genera are revised; the
latter includes three new species (G. dewildeana, G. rammelooana and G. robbrechtiana) and two new combinations
(G. leniochlamys and G. uncinula). The close relationship of Cuviera s.s. and Globulostylis to Vangueriella is
shown. Six aberrant species (most from East Africa) are excluded from Cuviera, but further work is needed before
they can be confidently assigned to other genera.

1 aVerstraete, Brecht1 aLachenaud, Olivier1 aSmets, Erik1 aDessein, S.1 aSonké, Bonaventure uhttps://rubiaceae-africa.myspecies.info/content/taxonomy-and-phylogenetics-cuviera-rubiaceae%E2%80%93vanguerieae-and-reinstatement-globulostylis-002683nas a2200193 4500008004100000245014800041210006900189300001200258490000800270520195900278100001302237700001702250700001502267700001602282700001502298700001802313700002102331856013702352 2016 eng d00aPhylogeography of the genus Podococcus (Palmae/Arecaceae) in Central African rain forests: Climate stability predicts unique genetic diversity.0 aPhylogeography of the genus Podococcus PalmaeArecaceae in Centra a126-1380 v1053 a

The tropical rain forests of Central Africa contain high levels of species diversity. Paleovegetation or biodiversity
patterns suggested successive contraction/expansion phases on this rain forest cover during the
last glacial maximum (LGM). Consequently, the hypothesis of the existence of refugia e.g. habitat stability
that harbored populations during adverse climatic periods has been proposed. Understory species are
tightly associated to forest cover and consequently are ideal markers of forest dynamics. Here, we used
two central African rain forest understory species of the palm genus, Podococcus, to assess the role of past
climate variation on their distribution and genetic diversity. Species distribution modeling in the present
and at the LGM was used to estimate areas of climatic stability. Genetic diversity and phylogeography
were estimated by sequencing near complete plastomes for over 120 individuals. Areas of climatic stability
were mainly located in mountainous areas like the Monts de Cristal and Monts Doudou in Gabon, but
also lowland coastal forests in southeast Cameroon and northeast Gabon. Genetic diversity analyses
shows a clear North–South structure of genetic diversity within one species. This divide was estimated
to have originated some 500,000 years ago. We show that, in Central Africa, high and unique genetic
diversity is strongly correlated with inferred areas of climatic stability since the LGM. Our results further
highlight the importance of coastal lowland rain forests in Central Africa as harboring not only high species
diversity but also important high levels of unique genetic diversity. In the context of strong human
pressure on coastal land use and destruction, such unique diversity hotspots need to be considered in
future conservation planning

1 aFaye, A.1 aDeblauwe, V.1 aMariac, C.1 aRichard, D.1 aSonké, B.1 aVigouroux, Y.1 aCouvreur, T.L.P. uhttps://rubiaceae-africa.myspecies.info/content/phylogeography-genus-podococcus-palmaearecaceae-central-african-rain-forests-climate02488nas a2200181 4500008004100000245012600041210006900167300001200236490000800248520179400256100001902050700002402069700001802093700001602111700002302127700001402150856014202164 2015 eng d00aMorphology, molecular phylogenetics and biogeography of Impatiens akomensis (Balsaminaceae), a new species from Cameroon.0 aMorphology molecular phylogenetics and biogeography of Impatiens a397-4080 v1483 a

Background and aims – A recent field expedition in the Campo-Ma’an/Akom II region in Cameroon
resulted in the collection of a previously unknown Impatiens species, which resembles Impatiens macroptera
and Impatiens pseudomacroptera. This study aims to describe and infer the evolutionary history of this
novelty by using phylogenetics, biogeographic inference and dating estimation analyses.
Methods – The new species was subject to a palynological, molecular phylogenetic and biogeographical
analysis. In addition, a thorough morphological comparison with its closely related species was conducted.
Key results – Morphological comparison and molecular phylogenetics corroborate its status as a new
species, which is given the name Impatiens akomensis. Molecular data, based on ImpDEF1, ImpDEF2 and
ITS indicate that Impatiens akomensis is most closely related to the Cameroonian I. macroptera, whereas
the lineage towards I. macroptera and the novelty is sister to the Gabonese I. pseudomacroptera. Impatiens
akomensis differs from I. macroptera and I. pseudomacroptera in having very strongly asymmetric white
flowers, much thicker leaves, a narrowly elliptic leaf shape and a serrulate leaf margin, smaller lateral
united petals (23.1–24.2 mm) and larger bracts (12–20 mm). The new species qualifies for endangered
status under IUCN criteria B2 and probably B1.
Conclusions – Dating analyses in combination with biogeographic inference, and ecological and
environmental interpretation of the novelty and its closely related species allows us to infer the putative
evolutionary history of Impatiens akomensis

1 aJanssens, S.B.1 aSonké, Bonaventure1 aLachenaud, O.1 aLemaire, B.1 aSimo-Droissart, M.1 aSmets, E. uhttps://rubiaceae-africa.myspecies.info/content/morphology-molecular-phylogenetics-and-biogeography-impatiens-akomensis-balsaminaceae-new01542nas a2200133 4500008004100000245009800041210006900139300001200208490000700220520097600227100002301203700002401226856015801250 2015 eng d00aLe genre Oxyanthus (Rubiaceae) en Afrique de l’Ouest: description d’une nouvelle espèce.0 aLe genre Oxyanthus Rubiaceae en Afrique de l Ouest description d a241-2470 v703 a

A new species, Oxyanthus andjigae Sonké & O. Lachenaud (Rubiaceae), from Ivory Coast and Sierra Leone, is described
and illustrated. It is closely related to Oxyanthus racemosus (Schumach. & Thonn.) Keay and Oxyanthus setosus Keay, and
was previously confused with the latter species; however, it differs from both in the longer corolla tube (18-19.5 cm vs
(7-)11-15.5 cm) and the longer hairs on the twigs (1.5-2 mm long vs. ≤ 1 mm in Oxyanthus setosus and ≤ 0.5 mm in
Oxyanthus racemosus). From Oxyanthus setosus it is also separated by the distribution, the latter species occuring from
Nigeria to Gabon. The species is assessed as “Endangered” following IUCN Categories and Criteria. A new identification
key to West African species of Oxyanthus DC. is presented; Oxyanthus oliganthus K. Schum. is newly reported from
Côte d’Ivoire and Ghana.
 

1 aLachenaud, Olivier1 aSonké, Bonaventure uhttps://rubiaceae-africa.myspecies.info/content/le-genre-oxyanthus-rubiaceae-en-afrique-de-l%E2%80%99ouest-description-d%E2%80%99une-nouvelle-esp%C3%A8ce01362nas a2200133 4500008004100000245007100041210006600112300001200178490000700190520089200197100001501089700001801104856010601122 2016 eng d00aTwo new species of Oxyanthus D.C. (Rubiaceae) from Central Africa.0 aTwo new species of Oxyanthus DC Rubiaceae from Central Africa a173-1800 v713 a

Two new Rubiaceae species from Central Africa, Oxyanthus doucetii Sonké & O. Lachenaud and Oxyanthus lewisii
Sonké & O. Lachenaud, are described and illustrated. Oxyanthus doucetii is endemic to Cameroon and is closely related
to Oxyanthus unilocularis Hiern, from which it differs in the minute calyx teeth, the stems with glabrous internodes, the
dorsally glabrous stipules, the flower buds with a shorter head, and the corolla lobes not or hardly acute at apex. Oxyanthus
lewisii is sparsely distributed from Cameroon to eastern Democratic Republic of Congo, and is characterised by narrow
fusiform fruits, glabrous stems, and leaves lacking domatia but sparsely pubescent on the nerves beneath. Both new
species are assessed as “Vulnerable” according to IUCN Red List Categories and Criteria.

1 aSonké, B.1 aLachenaud, O. uhttps://rubiaceae-africa.myspecies.info/content/two-new-species-oxyanthus-dc-rubiaceae-central-africa03328nas a2200313 4500008004100000245010800041210006900149300001400218490000800232520226700240653002202507653001402529653002202543653002302565653002402588653001402612653002602626653001402652653002202666100002902688700002402717700002302741700002202764700002202786700002302808700002602831700002002857856013702877 2016 eng d00aMorphometrics and molecular phylogenetics of Angraecum section Dolabrifolia (Orchidaceae, Angraecinae).0 aMorphometrics and molecular phylogenetics of Angraecum section D a1027-10450 v3023 a

Background and aims – Recent molecular studies suggest the polyphyly of Angraecum and the
unnaturalness of some of its sections, as exemplified by sect. Pectinaria, which has species in two wellseparated
clades, one in Madagascar and the other in continental Africa. However, species delimitation
among the five continental African members remained problematic due to morphological variability. In
preparation for the taxonomic revision of this group, we used morphological and molecular data to re-assess
the circumscription of each species, and to evaluate their monophyly and relationships to one another.
Methods – A total of 59 alcohol-preserved specimens were used to perform multivariate analyses on 37
morphological characters. DNA sequences from one nuclear (ITS-1) and five plastid regions (matK, rps16,
trnL–F, trnC–petN and ycf1) were analyzed using Parsimony and Bayesian methods.
Key results – The morphometric study revealed five distinct morphospecies that correspond to the concepts
of the currently recognized species. Angraecum doratophyllum and A. subulatum are the most distinct
morphologically, whereas A. atlanticum, A. gabonense and A. pungens are most similar to one another.
Phylogenetic analyses using a combined data set of the six markers yielded highly resolved, congruent
trees with strong branch support. The polyphyly of A. sect. Pectinaria is confirmed, with continental
African members appearing to be most closely related to sect. Dolabrifolia, found exclusively in Africa.
The multiple accessions of A. doratophyllum, A. gabonense, A. pungens and A. subulatum each formed a
well-supported clade. Parsimony and Bayesian analyses placed A. atlanticum and A. pungens in a subclade
within which samples of A. pungens were nested but those of A. atlanticum formed a grade. These two
species can be easily distinguished morphologically by leaf dimensions and flower length, but broader
sampling in continental Africa is needed to test whether individuals recognized as A. atlanticum might
represent two distinct taxa.
 

10aAngraecoid orchid10aAngraecum10aBayesian analyses10acontinental Africa10amolecular phylogeny10amonophyly10amorphometric analyses10aparsimony10asect. Pectinaria.1 aSimo-Droissart, Murielle1 aSonké, Bonaventure1 aDroissart, Vincent1 aMicheneau, Claire1 aLowry, Porter, P.1 aHardy, Olivier, J.1 aPlunkett, Gregory, M.1 aStévart, Tariq uhttps://rubiaceae-africa.myspecies.info/content/morphometrics-and-molecular-phylogenetics-angraecum-section-dolabrifolia-orchidaceae01958nas a2200181 4500008004100000245017500041210006900216300001200285490000800297520118800305100001801493700002001511700002401531700002901555700002401584700002301608856014501631 2016 eng d00aSynoptic revision of the genus Cyrtorchis Schltr. (Angraecinae, Orchidaceae) in Central Africa, with the description of a new species restricted to submontane vegetation.0 aSynoptic revision of the genus Cyrtorchis Schltr Angraecinae Orc a165-1860 v2673 a

As a preliminary step to the taxonomic revision of the genus Cyrtorchis, a synoptic revision of the species occurring in Central
Africa was undertaken. Based on a detailed examination of 1,039 herbarium specimens, including nomenclatural types,
we have recognized 14 species in Central Africa (one of which is divided into two subspecies), including one new species
that the study brought to light, described here as Cyrtorchis submontana. The new species closely resembles C. guillaumetii
and C. brownii in general aspect, but differs from them in having thinner, small elliptic leaves and shorter, fewer-flowered,
more lax inflorescences with shorter bracts. The species is restricted to submontane vegetation of Central Africa and is assessed
as Endangered following the IUCN Red List Categories and Criteria. Cyrtorchis latibracteata and C. subcylindrifolia
are lectotypified, and the latter is placed as a synonym under C. henriquesiana. Many new records are reported, and for each
taxon the distribution, habitat and ecology are given. An identification key for the Central African taxa is also provided.

1 aAzandi, Laura1 aStévart, Tariq1 aSonké, Bonaventure1 aSimo-Droissart, Murielle1 aAvana, Marie-Louise1 aDroissart, Vincent uhttps://rubiaceae-africa.myspecies.info/content/synoptic-revision-genus-cyrtorchis-schltr-angraecinae-orchidaceae-central-africa-description02610nas a2200157 4500008004100000245009900041210006900140520195900209100001602168700002902184700002702213700002002240700002402260700002802284856014002312 2016 eng d00aPhylogenetics and diversification history of African rattans (Calamoideae, Ancistrophyllinae).0 aPhylogenetics and diversification history of African rattans Cal3 a

Even though African rain forests display high levels of local species diversity and endemism, their lower
continental species diversity when compared with the Neotropics and Asia is paradoxical. This disparity is
mainly thought to be linked to either important extinction events during the Pleistocene or at the Eocene–
Oligocene boundary. African rattans or climbing palms are one of the most diverse clades of palms in Africa,
representing one-third of all known species. Here, we reconstruct the phylogeny and temporal evolution of
African rattans (Arecaceae: Calamoideae: Lepidocaryeae: Ancistrophyllinae) to test the two main hypotheses of
palm evolution in Africa. We constructed a near-complete, dated species-level phylogenetic tree for subtribe
Ancistrophyllinae using plastid and nuclear markers. The generic relationships between Ancistrophyllinae were
fully resolved and species-level relationships are well to weakly supported. Ancistrophyllinae diversified during
the Eocene with most species originating during the late Miocene after 10 Mya. This result is in agreement with
several other studies suggesting a pre–Pleistocene origin of the extant African flora. Ancistrophyllinae display an
anti-sigmoidal lineage-through-time plot with a moderate overall extinction fraction. Our simulations suggest
important roles for an ancient extinction event at the Oligocene–Eocene boundary. In contrast, the hypothesis of
an important extinction event in palms during the late Pliocene at 3 Mya is not supported. We suggest that the
evolutionary history of African rattans has undergone a constant diversification rate punctuated by one or
several important extinction events during the first part of the Cenozoic with most species diversity accumulating
during the late Miocene and Pliocene.

1 aFaye, Adama1 aPintaud, Jean-Christophe1 aFls, William, J. Baker1 aVigouroux, Yves1 aSonké, Bonaventure1 aCouvreur, Thomas, L. P. uhttps://rubiaceae-africa.myspecies.info/content/phylogenetics-and-diversification-history-african-rattans-calamoideae-ancistrophyllinae02356nas a2200193 4500008004100000245012200041210006900163300001200232490000800244520161100252100001801863700002701881700002401908700002101932700002301953700002301976700002001999856014302019 2016 eng d00aPhylogenetics of tribe Sabiceeae (Ixoroideae, Rubiaceae) revisited, with a new subgeneric classification for Sabicea.0 aPhylogenetics of tribe Sabiceeae Ixoroideae Rubiaceae revisited  a551-5800 v1823 a

Tribe Sabiceeae (Ixoroideae, Rubiaceae) has undergone recent taxonomical changes with the incorporation of the
related genera Ecpoma, Pseudosabicea and Stipularia into the type genus Sabicea. We use phylogenetic analysis
and morphological data to verify the relationships among members of the tribe, including the most
comprehensive taxon sampling of the tribe to date with 74 of 145 species. Sequence data from the nuclear
internal transcribed spacer (ITS) and three plastid markers (petD, rps16, trnT–F) were used to infer relationships
among the members of the tribe. Individual analyses using maximum likelihood, parsimony and Bayesian
approaches reveal several supported clades: the former genus Stipularia is resolved as a monophyletic unit, but
Ecpoma is monophyletic only if Sabicea urbaniana and Sabicea xanthotricha are included (corresponding to
Sabicea subgenus Stipulariopsis sensu Wernham). Pseudosabicea is biphyletic, with one clade corresponding to
section Anisophyllae of Halle (1964) and the other one to the other sections (Floribundae and Sphaericae) of the
genus. Eleven morphological characteristics were recorded for all species studied and seven have been mapped
onto the phylogenetic tree to study their evolution in the group and assess their value for the classification of
Sabicea s.l. Finally, our study shows that a combination of diagnostic characteristics should be used to
differentiate each group and we propose to recognise four subgenera in Sabicea.

1 aZemagho, Lise1 aLiede-Schumann, Sigrid1 aSonké, Bonaventure1 aJanssens, Steven1 aLachenaud, Olivier1 aVerstraete, Brecht1 aDessein, Steven uhttps://rubiaceae-africa.myspecies.info/content/phylogenetics-tribe-sabiceeae-ixoroideae-rubiaceae-revisited-new-subgeneric-classification01945nas a2200181 4500008004100000245013700041210006900178300001300247490000800260520121100268100002901479700002401508700002301532700002401555700002201579700002001601856014201621 2016 eng d00aA taxonomic revision of Angraecum section Dolabrifolia (Orchidaceae, Angraecinae), with the description of a new species from Gabon.0 ataxonomic revision of Angraecum section Dolabrifolia Orchidaceae a81–1150 v2803 a

Despite a paucity of material available from continental Africa, previous morphological and molecular phylogenetic studies
have suggested that Angraecum, the largest genus of the angraecoid orchids, is polyphyletic. A recent study based on
broad sampling from the region confirmed the monophyly of section Dolabrifolia and a clear delimitation of four of its five
members, one of which represents a new species. Based on these results, a comprehensive taxonomic revision of Angraecum
sect. Dolabrifolia is presented here. It includes an identification key and a detailed description of each species, along with
color photographs, distribution maps, information on habitat and phenology, and a preliminary risk of extinction assessment
according to the IUCN Red List categories and criteria. Species richness in the section is highest in Atlantic Central Africa
and around the Albertine Rift. The new species, A. biteaui, is described and illustrated with line drawings. It most closely
resembles A. aporoides in general aspect but differs in both foliar and floral characters, and is only known from lowland
forests in Gabon.

1 aSimo-Droissart, Murielle1 aSonké, Bonaventure1 aDroissart, Vincent1 aGeerinck†, Daniel1 aLowry, Porter, P.1 aStévart, Tariq uhttps://rubiaceae-africa.myspecies.info/content/taxonomic-revision-angraecum-section-dolabrifolia-orchidaceae-angraecinae-description-new02329nas a2200145 4500008004100000245008400041210006900125300001200194490000800206520178900214100001802003700001502021700002702036856012002063 2017 eng d00aTaxonomic revision of the African genera Brieya and Piptostigma (Annonaceae). 0 aTaxonomic revision of the African genera Brieya and Piptostigma  a173-2160 v1503 a

Background and aims – Annonaceae are an important family in tropical rain forests of Africa. Here, we
present a revision of the west-central African genus Piptostigma of the tribe Piptostigmateae. Previous
molecular phylogenetic analyses of Piptostigmateae have revealed that the genus as currently circumscribed
is paraphyletic. The aims of the article are: (1) to clarify the generic delimitation of the genus Piptostigma,
especially in relation to its current polyphyletic delimitation; (2) to provide a new updated key to the genera
of tribe Piptostigmateae; and (3) to provide for the first time in over 100 years a complete taxonomic
revision of genera Brieya and Piptostigma.
Material and methods – Normal practices of herbarium taxonomy were used for the morphological study
of about 200 specimens from B, BR, BRLU, G, HBG, K, L, LBV, LISC, MO, P, U, US, WAG, YA and
Z. We sequenced three plastid regions for 32 samples representing 26 ingroup (Piptostigmateae) and six
outgroup species in order to explore the paraphyly of Piptostisma. The open source software QGis was
used to generate the distribution maps of the species and their conservation status was obtained using the
IUCN categories and criteria.
Key results – Molecular and morphological evidence support the reinstatement of the genus Brieya De
Wild. Three keys are presented, one to the genera of Piptostigmateae and the two others to the species of
Brieya and Piptostigma. A total of thirteen species are described for Piptostigma and two for the genus
Brieya. Four new species are presented for the genus Piptostigma: P. macrophyllum, P. mayndongtsaeanum,

1 aGhogue, J.-P.1 aSonké, B.1 aThomas, L.P., Couvreur uhttps://rubiaceae-africa.myspecies.info/content/taxonomic-revision-african-genera-brieya-and-piptostigma-annonaceae01455nas a2200157 4500008004100000245012100041210006900162300001200231490000700243520084700250100001701097700001501114700001401129700001701143856013701160 2017 eng d00aCraterispermum capitatum and C. gabonicum (Rubiaceae): two new species from the Lower Guinean and Congolian Domains.0 aCraterispermum capitatum and C gabonicum Rubiaceae two new speci a103-1180 v833 a

Craterispermum capitatum and C. gabonicum, two new species of Rubiaceae, are described from the Lower
Guinea and Congolian Domains. Detailed descriptions and distribution maps are provided for each species,
their conservation status is assessed and their taxonomic affinities are discussed. Craterispermum
gabonicum is unique within the genus because of the strong dimorphism in brevistylous and longistylous
flowers and inflorescences. We hypothesize that this species shows some form of dioecy. The distribution
of C. capitatum shows a wide disjunction: the species is present in the Lower Guinean and Congolian
Domains but absent from Gabon and South Cameroon. An identification key for the Craterispermum
species present in the Lower Guinean and Congolian Domains is given.

1 aTaedoumg, H.1 aSonké, B.1 aHamon, P.1 aDe Block, P. uhttps://rubiaceae-africa.myspecies.info/content/craterispermum-capitatum-and-c-gabonicum-rubiaceae-two-new-species-lower-guinean-and01437nas a2200157 4500008004100000245015700041210006900198520076700267100002301034700001701057700001501074700001501089700001501104700001801119856014201137 2018 eng d00aNew taxonomic and conservation status of Ossiculum (Vandeae, Orchidaceae), a highly threatened and narrow-endemic angraecoid orchid from Central Africa.0 aNew taxonomic and conservation status of Ossiculum Vandeae Orchi3 a

In the context of producing a revised phylogenetic Linnean taxonomy of angraecoid orchids, the monotypic
and narrow-endemic genus Ossiculum is synonymised with Calyptrochilum. Accordingly, a new combination
in Calyptrochilum is proposed for Ossiculum aurantiacum. The morphological and DNA-based
evidence for this transfer is discussed. Moreover, Calyptrochilum aurantiacum is here firstly reported outside
Cameroon, with a record from the Republic of the Congo. The Red List conservation status of this
species is reassessed and it is to be downgraded from “Critically Endangered” (CR) to “Endangered” (EN),
following the recent discovery of additional subpopulations in Cameroon.

1 aSimo-Droissart, M.1 aStévart, T.1 aSonké, B.1 aMayogo, S.1 aKamdem, N.1 aDroissart, V. uhttps://rubiaceae-africa.myspecies.info/content/new-taxonomic-and-conservation-status-ossiculum-vandeae-orchidaceae-highly-threatened-and02105nas a2200169 4500008004100000245008600041210006900127490000700196520150500203100001401708700002701722700001401749700001501763700001801778700001701796856012201813 2018 eng d00aKupeantha (Coffeeae, Rubiaceae), a new genus from Cameroon and Equatorial Guinea.0 aKupeantha Coffeeae Rubiaceae a new genus from Cameroon and Equat0 v133 a

Two new coffee relatives (tribe Coffeeae, Rubiaceae), discovered during botanical expeditions
to Cameroon, are examined for generic placement, and the placement of three previously
known species (Argocoffeopsis fosimondi, A. spathulata and Calycosiphonia pentamera) is
reinvestigated using plastid sequence (accD-psa1, rpl16, trnL-F) and morphological data.
Seed biochemistry of the new species and pollen micromorphology (only one of the two species)
are also studied. Based on the plastid sequence data, the new taxa are nested in a wellsupported
monophyletic group that includes Argocoffeopsis and Calycosiphonia. Within this
clade, three well-supported subclades are recovered that are morphologically easy to diagnose:
(1) Calycosiphonia (excluding C. pentamera), (2) Argocoffeopsis (excluding A. fosimondi
and A. spathulata), and (3) a clade including the above excluded species, in addition to the
new species. Based on the results, Kupeantha, a new genus of five species, is described,
including two new Critically Endangered taxa from the Highlands of Cameroon: Kupeantha
ebo and K. kupensis. Phytochemical analysis of Kupeantha seeds reveals compounds
assigned as hydroxycinnamic acid derivatives, amino acids and ent-kaurane diterpenoids; caffeine
was not detected. Kupeantha is the first new genus described in tribe Coffeeae in 40
years.
Introduction

1 aCheek, M.1 aAlvarez-Aguirre, M.-G.1 aGrall, A.1 aSonké, B.1 aHowes, M-J.R.1 aLarridon, I. uhttps://rubiaceae-africa.myspecies.info/content/kupeantha-coffeeae-rubiaceae-new-genus-cameroon-and-equatorial-guinea02084nas a2200169 4500008004100000245011800041210006900159520138700228100002801615700002301643700002401666700001901690700002001709700002701729700002001756856013801776 2018 eng d00aGuinea yam (Dioscorea spp., Dioscoreaceae) wild relatives identified using whole plastome phylogenetic analyses. 0 aGuinea yam Dioscorea spp Dioscoreaceae wild relatives identified3 a

The genus Dioscorea (Dioscoreaceae) contains several economically important species for human consumption,
medical and pharmaceutical uses. The phylogeny of this genus is not yet fully resolved. As a result, the relationships between
cultivated yams and their wild relatives are not well understood and this negatively affects the understanding of the evolution
of cultivated yams. Here, we reconstructed the phylogenetic relationships of the main African cultivated species with all West
African species in order to better circumscribe the crop wild relatives of African yams. Complete plastomes of 57 individuals
representing all 17 known Dioscorea species from West Africa were reconstructed. Tree topologies generated using maximum
parsimony and maximum likelihood approaches were highly congruent. Six monophyletic groups were obtained. All the
species were distinct except within the cultivated clade, where it was not possible to separate the two main cultivated species
(D. cayenensis, D. rotundata) from their closest West African wild relatives (D. abyssinica, D. praehensilis, D. sagittifolia).
Dioscorea baya formed a monophyletic group closely related to the cultivated clade. We therefore suggest it is included within
the yam crop–wild relative complex.

1 aMagwé-Tindo, acqueline1 aJ, Jan, J. Wiering1 aSonké, Bonaventure1 aZapfack, Louis1 aVigouroux, Yves1 aCouvreur, Thomas, L.P.1 aScarcelli, Nora uhttps://rubiaceae-africa.myspecies.info/content/guinea-yam-dioscorea-spp-dioscoreaceae-wild-relatives-identified-using-whole-plastome02045nas a2200169 4500008004100000245007400041210006900115300001000184490000800194520144000202100002601642700002301668700002301691700002401714700002701738856011001765 2018 eng d00aTwo new species of Raphia (Palmae/Arecaceae) from Cameroon and Gabon0 aTwo new species of Raphia PalmaeArecaceae from Cameroon and Gabo a17-300 v1113 a

Raphia (Arecaceae, Calamoideae) is the most diverse genus of African palms with around 20 species.
Two new species from Cameroon and Gabon, Raphia gabonica Mogue, Sonké & Couvreur, sp. nov. and
Raphia zamiana Mogue, Sonké & Couvreur, sp. nov. are described and illustrated. Their affinities are
discussed and the conservation status of each species is assessed. For both species, distribution maps are
provided. Raphia gabonica is restricted to two small populations from central Gabon, where it occurs on
hillsides on tierra firme soil, and close to small streams. Its preliminary IUCN status is Endangered, being
amongst the five most threatened palm species in Africa. Raphia gabonica potentially belongs to the moniliform
section. Raphia zamiana is largely distributed from south Cameroon to south Gabon and is very
common. It is also a multi-used palm, from which wine, grubs and construction material are extracted and
sold. It generally occurs in large stands in a wide range of ecosystems such as swamps, coastal forests on
partially inundated sandy soils and inundated savannahs. Its large stature, hard to access habitat (swamps)
and abundant presence might have discouraged botanists to collect it until now. Raphia zamiana belongs
to the taxonomically complex raphiate section.

1 aKamga, Suzanne, Mogue1 aNiangadouma, Raoul1 aStauffer, Fred, W.1 aSonké, Bonaventure1 aCouvreur, Thomas, L.P. uhttps://rubiaceae-africa.myspecies.info/content/two-new-species-raphia-palmaearecaceae-cameroon-and-gabon00604nas a2200169 4500008004100000245007500041210006900116100002100185700001700206700001500223700001700238700001400255700001600269700001500285700002100300856011300321 2018 eng d00aTaxonomic revision of the African genus Greenwayodendron (Annonaceae).0 aTaxonomic revision of the African genus Greenwayodendron Annonac1 aLissambou, B.-J.1 aHardy, O.-J.1 aAtteke, C.1 aStévart, T.1 aDauby, G.1 aMbatchi, B.1 aSonké, B.1 aCouvreur, T.L.P. uhttps://rubiaceae-africa.myspecies.info/content/taxonomic-revision-african-genus-greenwayodendron-annonaceae00623nas a2200157 4500008004100000245007600041210006900117100002900186700002200215700002400237700001900261700002000280700002800300700002000328856011700348 2019 eng d00aComplete plastome sequences of 14 African yam species (Dioscorea spp.).0 aComplete plastome sequences of 14 African yam species Dioscorea 1 aMagwé-Tindo, Jacqueline1 aWieringa, Jan, J.1 aSonké, Bonaventure1 aZapfack, Louis1 aVigouroux, Yves1 aCouvreur, Thomas, L. P.1 aScarcelli, Nora uhttps://rubiaceae-africa.myspecies.info/content/complete-plastome-sequences-14-african-yam-species-dioscorea-spp39698nas a2200325 45000080041000002450113000412100069001543000009002234900008002325203860200240653001738842653002338859653002538882653003138907653001638938653001238954653001438966653002238980100002339002700002339025700001839048700002039066700002139086700003039107700002939137700002039166700002239186700002439208856014039232 2019 eng d00aMine versus Wild: a plant conservation checklist of the rich Iron-Ore Ngovayang Massif Area (South Cameroon)0 aMine versus Wild a plant conservation checklist of the rich Iron a8-290 v1523 a

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Background and aims – The rapid expansion of human activities in South Cameroon, particularly mining in mountainous areas, threatens this region’s exceptional biodiversity. To comprehend the effects of land-use change on plant diversity and identify conservation priorities, we aim at providing a first comprehensive plant checklist of the Ngovayang Massif, focusing on the two richest plant families, Orchidaceae and Rubiaceae.

Location – The Ngovayang Massif Area (NMA) is located in the South Region of Cameroon. It is covered by lowland and submontane rainforest (100 to 1110 m elevation).

Methods – We compiled a dataset of 6116 georeferenced herbarium specimens, of which 2787 belong to Rubiaceae and Orchidaceae. We used rarefaction methods to explore sampling and diversity patterns, and investigated the altitudinal distribution of rare and/or threatened taxa.

Key results – The NMA, which houses about 1500 vascular plant taxa, is the richest documented area for Rubiaceae in Atlantic Central Africa (ACA) and the fifth for Orchidaceae, with respectively 281 and 111 taxa. Among these taxa, 178 (45%) are endemic to ACA and 67 (17%) are considered globally threatened according to IUCN categories and criteria. We show that higher elevation areas (> 750 m), which are also the main areas targeted for mining, are the richest in endangered and/or rare species. Three new records for Cameroon are reported here.

Conclusion – The NMA represents an Important Plant Area of Cameroon as confirmed by its exceptional plant diversity (> 20% of the total Flora of Cameroon), by the concentration of many threatened and/or restricted range species (10 taxa are strict endemics of the massif) as well as by the threat on rare habitats (i.e. the submontane vegetation above ~750 m elevation). A management plan involving in situ and ex situ conservation actions is urgently needed to reduce the potential threats of future mining activities.

10aBiodiversity10aendangered species10aImportant Plant Area10airon and gold exploitation10anew records10aorchids10aRubiaceae10asubmontane forest1 aDroissart, Vincent1 aLachenaud, Olivier1 aDauby, Gilles1 aDessein, Steven1 aKamdem, Gyslène1 aK., Charlemagne, Nguembou1 aSimo-Droissart, Murielle1 aStévart, Tariq1 aTaedoumg, Hermann1 aSonké, Bonaventure uhttps://rubiaceae-africa.myspecies.info/content/mine-versus-wild-plant-conservation-checklist-rich-iron-ore-ngovayang-massif-area-south38768nas a2200277 45000080041000002450103000412100069001442600021002133000012002344900007002465203791300253653001138166653001338177653002238190653001038212653001038222653001238232653001638244653001438260653001238274653001338286100001838299700002338317700002438340856012638364 2018 eng d00aFour new species of Sabicea (Rubiaceae) from tropical Africa, with additional notes on the genus. 0 aFour new species of Sabicea Rubiaceae from tropical Africa with  c23 November 2018 a277-2930 v733 a

Four new species of Sabicea (Rubiaceae) from tropical Africa are described and illustrated: S. desseinii from Cameroon, Gabon and Equatorial Guinea, S. ezangae from Gabon, S. jongkindii from Liberia and Ghana, and S. uniflora from Gabon. Their affinities are discussed, and the conservation status of each species is assessed. Sabicea speciosissima K.Schum. is excluded from the genus and synonymised with Rothmannia octomera (Hook.) Fagerl. Three other species are sunk into synonymy:  Sabicea gigantea Wernham with S. dewevrei De Wild., S. arachnoidea Hutch. & Dalziel with S. discolor Stapf, and S. neglecta Hepper with S. speciosa K.Schum.

10aAfrica10aCameroon10aEquatorial Guinea10aGabon10aGhana10aLiberia10anew species10aRubiaceae10aSabicea10ataxonomy1 aZemagho, Lise1 aLachenaud, Olivier1 aSonké, Bonaventure uhttps://rubiaceae-africa.myspecies.info/content/four-new-species-sabicea-rubiaceae-tropical-africa-additional-notes-genus38084nam a2200145 45000080041000002450222000412100069002635203735100332100001837683700002737701700002337728700002037751700002437771856014337795 2017 eng d00aTaxonomic revision of Sabicea subgenus Anisophyllae (Ixoroideae, Rubiaceae) from Tropical Africa, with four new species. Phytotaxa 293(1): 68 p. doi.org/10.11646/phytotaxa.293.1. Magnolia Press, Auckland, New Zealand.0 aTaxonomic revision of Sabicea subgenus Anisophyllae Ixoroideae R3 a

16.00 800x600 Normal 0 21 false false false FR-BE X-NONE X-NONE MicrosoftInternetExplorer4

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), while 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.

1 aZemagho, Lise1 aLiede-Schumann, Sigrid1 aLachenaud, Olivier1 aDessein, Steven1 aSonké, Bonaventure uhttps://rubiaceae-africa.myspecies.info/content/taxonomic-revision-sabicea-subgenus-anisophyllae-ixoroideae-rubiaceae-tropical-africa-four01475nas a2200217 4500008004100000245013600041210006900177260001600246490000600262520064600268653002400914653002900938653001700967653001600984100001801000700002301018700002701041700002001068700002401088856014501112 2014 eng d00aTwo new Sabicea (Rubiaceae) species from West Central Africa: Sabicea bullata and Sabicea urniformis. Phytotaxa 173 (4): 285–292.0 aTwo new Sabicea Rubiaceae species from West Central Africa Sabic c2 Jul. 20140 v43 a

Two distinctive new species of Sabicea (Rubiaceae) from the Lower Guinea region are described and illustrated. Sabicea bullata is easily recognized by its cordate leaves, which are strongly bullate above, and its sessile glomerulate inflorescences. It is restricted to the Rumpi Hills and Bakossi Mountains, in southwestern Cameroon. Sabicea urniformis, from southern Gabon and Congo-Brazzaville, is remarkable in having discolorous leaves and an urn-shaped involucre with bracts shortly connate at the base. Detailed descriptions and botanical drawings are provided, conservation status assessed and taxonomic affinities discussed.

10aConservation status10aIUCN Red List Categories10aLower Guinea10aRumpi Hills1 aZemagho, Lise1 aLachenaud, Olivier1 aLiede-Schumann, Sigrid1 aDeissen, Steven1 aSonké, Bonaventure uhttps://rubiaceae-africa.myspecies.info/content/two-new-sabicea-rubiaceae-species-west-central-africa-sabicea-bullata-and-sabicea-urniform-001446nas a2200241 4500008004100000245008900041210006900130260001700199490000600216520062800222653001300850653002900863653001000892653002800902653004200930653001000972653001300982653002700995100002401022700002001046700002301066856011501089 2015 eng d00aSynopsis of the genus Massularia (Rubiaceae) with a new species from Central Africa.0 aSynopsis of the genus Massularia Rubiaceae with a new species fr c25 Mar. 20150 v33 a

Based on a careful examination of more than 700 herbarium specimens and field investigation, a comprehensive revision of the genus Massularia is given. Massularia stevartiana, a new species from Central African Republic, Cameroon and Gabon is described and illustrated. The novelty is distinguished from M. acuminata, the only other species previously recognized in the genus, by its smaller leaves and flowers. For the two species recognized we provide a morphological description, distribution, habitat, phenology and IUCN conservation status assessment. Distribution maps and a dichotomous key are also provided

10aCameroun10aCentral African Republic10aGabon10aGuineo-Congolian Region10aIUCN Red List Categories and Criteria10ashrub10ataxonomy10atropical African flora1 aSonké, Bonaventure1 aBidault, Ehoarn1 aDroissart, Vincent uhttps://rubiaceae-africa.myspecies.info/content/synopsis-genus-massularia-rubiaceae-new-species-central-africa02028nas 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-gardenieae01043nas a2200241 4500008004100000245009400041210006900135300000800204490000700212520025300219653001300472653001400485653001700499653002900516653001500545653001400560653001500574100002400589700002600613700001800639700001700657856012700674 2006 eng d00aA new species of Chassalia (Rubiaceae, Rubioideae) from southern Cameroon: C. bipindensis0 anew species of Chassalia Rubiaceae Rubioideae from southern Came a5890 v613 a

Chassalia bipindensis Sonké, Nguembou & A. P. Davis (Rubiaceae), a new species from southern Cameroon, is described and illustrated. The conservation status and taxonomic affinities of the new species are
discussed.

10aCameroon10aChassalia10aconservation10aIUCN Red List Categories10arainforest10aRubiaceae10aRubioideae1 aSonké, Bonaventure1 aNguembou, Charlemagne1 aCheek, Martin1 aDavis, Aaron uhttps://rubiaceae-africa.myspecies.info/content/new-species-chassalia-rubiaceae-rubioideae-southern-cameroon-c-bipindensis00851nas a2200205 4500008004100000245008500041210006900126260000800195300000800203490000700211520018800218653001900406653001300425653001300438653001000451653002300461100001800484700002400502856011900526 2008 eng d00aA new Argocoffeopsis (Coffeeae, Rubiaceae) from southern Cameroon: A. spathulata0 anew Argocoffeopsis Coffeeae Rubiaceae from southern Cameroon A s c532 a5270 v533 a

A new species of Argocoffeopsis, A. spathulata, is described as new to science. A description, line
drawing, distribution map and conservation assessment are provided

10aArgocoffeopsis10aCameroon10aCoffeeae10aIUCN.10aplant conservation1 aDavis, A., P.1 aSonké, Bonaventure uhttps://rubiaceae-africa.myspecies.info/content/new-argocoffeopsis-coffeeae-rubiaceae-southern-cameroon-spathulata01136nas a2200229 4500008004100000245010600041210007000147300000800217490000600225520032900231653001300560653001700573653001600590653001400606653002400620100002600644700002100670700002300691700001900714700002400733856014900757 2009 eng d00a Une espèce nouvelle de Bertiera (sous-genre Bertierella, Rubiaceae) d’Afrique centrale atlantique0 aUne espèce nouvelle de Bertiera sousgenre Bertierella Rubiaceae  a4060 v23 a

A new species belonging to the genus Bertiera (subgenus Bertierella, Rubiaceae)
from West Central Africa (Cameroon, Equatorial Guinea and Gabon) is described.
Its diagnostic characters are elucidated, its taxonomic affi nities are
discussed and notes on its conservation status are provided.

10aBertiera10aconservation10anew species10aRubiaceae10aWest Central Africa1 aNguembou, Charlemagne1 aEwedje, D.K., E.1 aDroissart, Vincent1 aStevart, Tariq1 aSonké, Bonaventure uhttps://rubiaceae-africa.myspecies.info/content/une-esp%C3%A8ce-nouvelle-de-bertiera-sous-genre-bertierella-rubiaceae-d%E2%80%99afrique-centrale01787nas a2200205 4500008004100000245008600041210006900127300000800196490000700204520109400211653001701305653001001322653003301332653001401365653001301379100002001392700002301412700002401435856012201459 2011 eng d00aColletoecema gabonensis, a third species of an unusual African genus of Rubiaceae0 aColletoecema gabonensis a third species of an unusual African ge a2190 v633 a

As a result of ongoing studies of the Rubiaceae of Gabon, the new species
Colletoecema gabonensis is here described and illustrated. It is endemic to Gabon,
where it is the only species of the genus, and is so far only known from three collections
from the Ogooué-Lolo and Ngounié provinces. The new species is morphologically
intermediate between its two congeners, C. dewevrei (from Cameroon, Central
African Republic, Republic of the Congo, DR Congo, and Angola) and C. magna
(endemic to Cameroon). The new species agrees with C. dewevrei in having flowers
with exserted anthers and style, but differs in its sessile flowers and fruits. In the latter
characters, it resembles C. magna, from which it can be separated by its smaller fruits
and leaves, and by its different floral morphology. An IUCN conservation assessment
has been made and the species is provisionally assessed as Vulnerable, based on its
restricted area of occupancy and the small number of known locations

10aColletoecema10aGabon10aIUCN conservation assessment10aRubiaceae10ataxonomy1 aDessein, Steven1 aLachenaud, Olivier1 aSonké, Bonaventure uhttps://rubiaceae-africa.myspecies.info/content/colletoecema-gabonensis-third-species-unusual-african-genus-rubiaceae01069nas a2200133 4500008004100000245008900041210006900130300000700199490000800206520054800214100002300762700002000785856013000805 2010 eng d00aThree new or little-known Chassalia (Rubiaceae) species from west and central Africa0 aThree new or littleknown Chassalia Rubiaceae species from west a a200 v 283 a

A new species from Liberia and Coˆte d’Ivoire, Chassalia bicostata O. Lachenaud & Jongkind, is described and
compared with its two close relatives, C. pteropetala (K. Schum.) Cheek and C. pleuroneura (K. Schum.)
O. Lachenaud, both from central Africa. The latter is here transferred to Chassalia from Psychotria. All three species
share deeply bifid stipules, which are an unusual feature in Chassalia. Full descriptions and illustrations are given for
the three taxa.

1 aLachenaud, Olivier1 aJongkind, Carel uhttps://rubiaceae-africa.myspecies.info/content/three-new-or-little-known-chassalia-rubiaceae-species-west-and-central-africa01045nas a2200133 4500008004100000245009300041210006900134300000800203490000700211520052300218100001800741700002300759856012900782 2013 eng d00aPsychotria elephantina sp. nov. (Rubiaceae) an endangered rainforest shrub from Cameroon0 aPsychotria elephantina sp nov Rubiaceae an endangered rainforest a5730 v313 a

Psychotria elephantina Lachenaud & Cheek is described as a new species. It is placed in P. sect. Involucratae (Petit) Verdc.,
endemic to the South West Region of Cameroon and is assessed as ‘ Endangered ’ (EN) using the IUCN criteria. Th e species
is distinctive in P. sect. Involucratae due to its long petioles (6.5 – 12.0 cm), involucres of two pairs of large free bracts and
green corollas with included stamens in both longistylous and brevistylous fl owers.

1 aCheek, Martin1 aLachenaud, Olivier uhttps://rubiaceae-africa.myspecies.info/content/psychotria-elephantina-sp-nov-rubiaceae-endangered-rainforest-shrub-cameroon00985nas a2200157 4500008004100000245010000041210006900141300000800210490000700218520038100225100002200606700002000628700001700648700002400665856013800689 2011 eng d00aCraterispermum parvifolium and C. robbrechtianum spp. nov. (Rubiaceae) from west central Africa0 aCraterispermum parvifolium and C robbrechtianum spp nov Rubiacea a7070 v293 a

Craterispermum parvifolium and C. robbrechtianum spp. nov. are described from the Lower Guinea Domain. Detailed
descriptions and distribution maps are provided for each species, their conservation status is assessed and their taxonomic
affinities are discussed. An identification key for the Craterispermum species of the Lower Guinea Domain is given.

1 aTaedoumg, Hermann1 aDe Block, Petra1 aHamon, Perla1 aSonké, Bonaventure uhttps://rubiaceae-africa.myspecies.info/content/craterispermum-parvifolium-and-c-robbrechtianum-spp-nov-rubiaceae-west-central-africa01878nas a2200229 4500008004100000245014500041210007100186260002000257300000800277490000800285520103400293653001301327653002201340653001001362653002001372100002301392700002301415700001701438700002001455700002401475856014901499 2013 eng d00aTaxonomy and phylogenetics of Cuviera (Rubiaceae–Vanguerieae) and reinstatement of Globulostylis with the description of three new species0 aTaxonomy and phylogenetics of Cuviera Rubiaceae–Vanguerieae and  c16 October 2013 a4410 v1733 a

Generic circumscriptions in tribe Vanguerieae (Rubiaceae) have been under discussion for a long time. Recent
molecular studies, while providing new insights, have not yet solved all the problems. In this study, the taxonomy
and phylogenetics of the genus Cuviera s.l. are investigated. On the basis of molecular and morphological evidence,
Cuviera is restricted to a group of ten West and Central African species. Globulostylis, previously included in
Cuviera, is reinstated as a distinct genus, with eight species from Central Africa. Both genera are revised; the
latter includes three new species (G. dewildeana, G. rammelooana and G. robbrechtiana) and two new combinations
(G. leniochlamys and G. uncinula). The close relationship of Cuviera s.s. and Globulostylis to Vangueriella is
shown. Six aberrant species (most from East Africa) are excluded from Cuviera, but further work is needed before
they can be confidently assigned to other genera. 

10aCameroon10aEquatorial Guinea10aGabon10aTropical Africa1 aVerstraete, Brecht1 aLachenaud, Olivier1 aSmeets, Erik1 aDessein, Steven1 aSonké, Bonaventure uhttps://rubiaceae-africa.myspecies.info/content/taxonomy-and-phylogenetics-cuviera-rubiaceae%E2%80%93vanguerieae-and-reinstatement-globulostylis01632nas a2200193 4500008004100000245006800041210006700109490000600176520100300182653001101185653001701196653001401213653002301227653002201250653001301272100002401285700002101309856010801330 2014 eng d00aTree diversity of the Dja Faunal Reserve, southeastern Cameroon0 aTree diversity of the Dja Faunal Reserve southeastern Cameroon0 v23 a

The Dja Faunal Reserve located in southeastern Cameroon represents the largest and
best protected rainforest patch in Cameroon. Here we make available a dataset on the
inventory of tree species collected across the Dja. For this study nine 5 km long and 5 m
wide transects were installed. All species with a diameter at breast height greater than 10
cm were recorded, identified and measured. A total of 11546 individuals were recorded,
corresponding to a total of 312 species identified with 60 genera containing unidentified
taxa. Of the 54 identified families Fabaceae, Rubiaceae and Malvaceae were the most
species rich, whereas Fabaceae, Phyllantaceae and Olacaceae were the most abundant.
Finally, Tabernaemontana crassa was the most abundant species across the Reserve. This
dataset provides a unique insight into the tree diversity of the Dja Faunal Reserve and is
now publically available and usable.

10aAfrica10aconservation10adiversity10aDja Faunal Reserve10aspecies inventory10atransect1 aSonké, Bonaventure1 aCouvreur, Thomas uhttps://rubiaceae-africa.myspecies.info/content/tree-diversity-dja-faunal-reserve-southeastern-cameroon02627nas a2200205 4500008004100000245013000041210006900171260001600240490000600256520184500262100001402107700002402121700002002145700002602165700002602191700002202217700001702239700002102256856014402277 2014 eng d00aMixed-Forest Species Establishment in a Monodominant Forest in Central Africa: Implications for Tropical Forest Invasibility.0 aMixedForest Species Establishment in a Monodominant Forest in Ce c20 May 20140 v93 a

Background: Traits of non-dominant mixed-forest tree species and their synergies for successful co-occurrence in
monodominant Gilbertiodendron dewevrei forest have not yet been investigated. Here we compared the tree species
diversity of the monodominant forest with its adjacent mixed forest and then determined which fitness proxies and life
history traits of the mixed-forest tree species were most associated with successful co-existence in the monodominant
forest.
Methodology/Principal Findings: We sampled all trees (diameter in breast height [dbh]$10 cm) within 661 ha
topographically homogenous areas of intact central African forest in SE Cameroon, three independent patches of G.
dewevrei-dominated forest and three adjacent areas (450–800 m apart). Monodominant G. dewevrei forest had lower
sample-controlled species richness, species density and population density than its adjacent mixed forest in terms of stems
with dbh$10 cm. Analysis of a suite of population-level characteristics, such as relative abundance and geographical
distribution, and traits such as wood density, height, diameter at breast height, fruit/seed dispersal mechanism and light
requirement–revealed after controlling for phylogeny, species that co-occur with G. dewevrei tend to have higher
abundance in adjacent mixed forest, higher wood density and a lower light requirement.
Conclusions/Significance: Our results suggest that certain traits (wood density and light requirement) and population-level
characteristics (relative abundance) may increase the invasibility of a tree species into a tropical closed-canopy system. Such
knowledge may assist in the pre-emptive identification of invasive tree species.

1 aPeh, KS-H1 aSonké, Bonaventure1 aSéné, Olivier1 aDjuikouo, Marie-Noël1 aNguembou, Charlemagne1 aTaedoumg, Hermann1 aKouob, Serge1 aLewis, Simon, L. uhttps://rubiaceae-africa.myspecies.info/content/mixed-forest-species-establishment-monodominant-forest-central-africa-implications-tropical02775nas a2200181 4500008004100000245011500041210006900156260001700225490000600242520207600248100002202324700002102346700002102367700002102388700001902409700002402428856014102452 2014 eng d00aCharacterizing the Phylogenetic Tree Community Structure of a Protected Tropical Rain Forest Area in Cameroon.0 aCharacterizing the Phylogenetic Tree Community Structure of a Pr c17 June 20140 v93 a

Tropical rain forests, the richest terrestrial ecosystems in biodiversity on Earth are highly threatened by global changes. This
paper aims to infer the mechanisms governing species tree assemblages by characterizing the phylogenetic structure of a
tropical rain forest in a protected area of the Congo Basin, the Dja Faunal Reserve (Cameroon). We re-analyzed a dataset of
11538 individuals belonging to 372 taxa found along nine transects spanning five habitat types. We generated a dated
phylogenetic tree including all sampled taxa to partition the phylogenetic diversity of the nine transects into alpha and beta
components at the level of the transects and of the habitat types. The variation in phylogenetic composition among
transects did not deviate from a random pattern at the scale of the Dja Faunal Reserve, probably due to a common history
and weak environmental variation across the park. This lack of phylogenetic structure combined with an isolation-bydistance
pattern of taxonomic diversity suggests that neutral dispersal limitation is a major driver of community assembly in
the Dja. To assess any lack of sensitivity to the variation in habitat types, we restricted the analyses of transects to the terra
firme primary forest and found results consistent with those of the whole dataset at the level of the transects. Additionally
to previous analyses, we detected a weak but significant phylogenetic turnover among habitat types, suggesting that
species sort in varying environments, even though it is not predominating on the overall phylogenetic structure. Finer
analyses of clades indicated a signal of clustering for species from the Annonaceae family, while species from the
Apocynaceae family indicated overdispersion. These results can contribute to the conservation of the park by improving our
understanding of the processes dictating community assembly in these hyperdiverse but threatened regions of the world.

1 aManel, Stéphanie1 aCouvreur, Thomas1 aMunoz, François1 aCouteron, Pierre1 aHardy, Olivier1 aSonké, Bonaventure uhttps://rubiaceae-africa.myspecies.info/content/characterizing-phylogenetic-tree-community-structure-protected-tropical-rain-forest-area