@article {99, title = {Morphology, molecular phylogenetics and biogeography of Impatiens akomensis (Balsaminaceae), a new species from Cameroon.}, journal = {Plant Ecology and Evolution}, volume = {148}, year = {2015}, pages = {397-408}, chapter = {397}, abstract = {

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

}, author = {S.B. Janssens and Bonaventure Sonk{\'e} and O. Lachenaud and B. Lemaire and M. Simo-Droissart and E. Smets} } @article {98, title = {Le genre Oxyanthus (Rubiaceae) en Afrique de l{\textquoteright}Ouest: description d{\textquoteright}une nouvelle esp{\`e}ce.}, journal = {Candollea}, volume = {70}, year = {2015}, pages = {241-247}, chapter = {241}, abstract = {

A new species, Oxyanthus andjigae Sonk\é \& 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
C\ôte d\’Ivoire and Ghana.

}, doi = {dx.doi.org/10.15553/c2015v702a10.}, author = {Olivier Lachenaud and Bonaventure Sonk{\'e}} } @article {79, title = {Synopsis of the genus Massularia (Rubiaceae) with a new species from Central Africa.}, journal = {Phytotaxa}, volume = {3}, year = {2015}, month = {25 Mar. 2015}, chapter = {263}, abstract = {

Based on a careful examination of more than 700 herbarium specimens and field investigation, a comprehensive revision of the genus Massularia is given. Massularia stevartiana, a new species from Central African Republic, Cameroon and Gabon is described and illustrated. The novelty is distinguished from M. acuminata, the only other species previously recognized in the genus, by its smaller leaves and flowers. For the two species recognized we provide a morphological description, distribution, habitat, phenology and IUCN conservation status assessment. Distribution maps and a dichotomous key are also provided

}, keywords = {Cameroun, Central African Republic, Gabon, Guineo-Congolian Region, IUCN Red List Categories and Criteria, shrub, taxonomy, tropical African flora}, author = {Sonk{\'e}, Bonaventure and Bidault, Ehoarn and Droissart, Vincent} }