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-species01475nas 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-001787nas 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-cameroon01878nas 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-globulostylis00735nas a2200217 4500008004100000020001400041245014300055210006900198260000900267300001200276490000800288100002300296700002300319700002000342700001900362700001900381700001900400700002200419700002400441856005200465 2013 eng d a2032-391300aNew records for the flora of Cameroon, including a new species of Psychotria (Rubiaceae) and range extensions for some rare species0 aNew records for the flora of Cameroon including a new species of c2013 a121-1330 v1461 aLachenaud, Olivier1 aDroissart, Vincent1 aDessein, Steven1 aStevart, Tariq1 aSimo, Murielle1 aLemaire, Benny1 aTaedoumg, Hermann1 aSonké, Bonaventure uhttps://rubiaceae-africa.myspecies.info/node/21