@article {89, title = {New taxonomic and conservation status of Ossiculum (Vandeae, Orchidaceae), a highly threatened and narrow-endemic angraecoid orchid from Central Africa.}, year = {2018}, abstract = {

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.

}, doi = {doi.org/10.3897/phytokeys.98.23511.}, author = {M. Simo-Droissart and T. St{\'e}vart and B. Sonk{\'e} and S. Mayogo and N. Kamdem and V. Droissart} } @article {88, title = {Kupeantha (Coffeeae, Rubiaceae), a new genus from Cameroon and Equatorial Guinea.}, journal = {PLoS ONE }, volume = {13}, year = {2018}, chapter = {e0199324. }, abstract = {

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

}, doi = {doi.org/10.1371/journal.pone.0199324}, author = {M. Cheek and M.-G. Alvarez-Aguirre and A. Grall and B. Sonk{\'e} and M-J.R. Howes and I. Larridon} } @article {85, title = {Taxonomic revision of the African genus Greenwayodendron (Annonaceae).}, year = {2018}, author = {B.-J. Lissambou and O.-J. Hardy and C. Atteke and T. St{\'e}vart and G. Dauby and B. Mbatchi and B. Sonk{\'e} and T.L.P. Couvreur} }