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-species01542nas 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-africa38768nas 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-genus