Jongkind, C.C.H. & O. Lachenaud (2022). Novelties in African Apocynaceae. Candollea 77: 17–51. In English, English and French abstracts.

In preparing the treatment of the Apocynaceae for the Flore du Gabon, a number of taxonomic novelties were discovered. Ten new species are here described and illustrated, nine of which occur in Gabon: Baissea atrobrunnea O. Lachenaud, Hunteria maasiorum Jongkind & E. Bidault, Landolphia anthonii Jongkind, L. obovata O. Lachenaud & Jongkind, L. persooniana O. Lachenaud & Jongkind, L. verrucosa Jongkind & O. Lachenaud, Oncinotis gabonica O. Lachenaud, Pleiocarpa robusta O. Lachenaud and Voacanga cornuta Jongkind. Seven of these species are endemic to the country, while Landolphia anthonii and L. obovata are also found in Cameroon. The remaining new species is Tabernaemontana fragrans Jongkind, which occurs from Guinea to Ghana and includes the West African material previously referred to T. psorocarpa (Pierre ex Stapf) Pichon. Additionally, five taxa are resurrected from synonymy, two of which are new combinations: Baissea congensis (R.D. Good) Jongkind and Voacanga lanceolata (Stapf) Jongkind. Finally, a lectotype is designated for the name Baissea concinna. Conservation status assessments are presented for the new species.

Received on April 27, 2021. Accepted on December 10, 2021. First published online on February 22, 2022.