01800nas 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-002488nas 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%A8ce03328nas 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-new02084nas 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-gabon00623nas 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

16.00 Normal 0 21 false false false FR-BE X-NONE X-NONE

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

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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-four