@article {96, title = {Morphometrics and molecular phylogenetics of Angraecum section Dolabrifolia (Orchidaceae, Angraecinae).}, journal = {Plant Syst Evol.}, volume = {302}, year = {2016}, pages = {1027-1045}, chapter = {1027}, abstract = {

Background and aims \– Recent molecular studies suggest the polyphyly of Angraecum and the
unnaturalness of some of its sections, as exemplified by sect. Pectinaria, which has species in two wellseparated
clades, one in Madagascar and the other in continental Africa. However, species delimitation
among the five continental African members remained problematic due to morphological variability. In
preparation for the taxonomic revision of this group, we used morphological and molecular data to re-assess
the circumscription of each species, and to evaluate their monophyly and relationships to one another.
Methods \– A total of 59 alcohol-preserved specimens were used to perform multivariate analyses on 37
morphological characters. DNA sequences from one nuclear (ITS-1) and five plastid regions (matK, rps16,
trnL\–F, trnC\–petN and ycf1) were analyzed using Parsimony and Bayesian methods.
Key results \– The morphometric study revealed five distinct morphospecies that correspond to the concepts
of the currently recognized species. Angraecum doratophyllum and A. subulatum are the most distinct
morphologically, whereas A. atlanticum, A. gabonense and A. pungens are most similar to one another.
Phylogenetic analyses using a combined data set of the six markers yielded highly resolved, congruent
trees with strong branch support. The polyphyly of A. sect. Pectinaria is confirmed, with continental
African members appearing to be most closely related to sect. Dolabrifolia, found exclusively in Africa.
The multiple accessions of A. doratophyllum, A. gabonense, A. pungens and A. subulatum each formed a
well-supported clade. Parsimony and Bayesian analyses placed A. atlanticum and A. pungens in a subclade
within which samples of A. pungens were nested but those of A. atlanticum formed a grade. These two
species can be easily distinguished morphologically by leaf dimensions and flower length, but broader
sampling in continental Africa is needed to test whether individuals recognized as A. atlanticum might
represent two distinct taxa.

}, keywords = {Angraecoid orchid, Angraecum, Bayesian analyses, continental Africa, molecular phylogeny, monophyly, morphometric analyses, parsimony, sect. Pectinaria.}, doi = {10.1007/s00606-016-1315-5.}, author = {Murielle Simo-Droissart and Bonaventure Sonk{\'e} and Vincent Droissart and Claire Micheneau and Porter P. Lowry II and Olivier J. Hardy and Gregory M. Plunkett and Tariq St{\'e}vart} } @article {95, title = {Synoptic revision of the genus Cyrtorchis Schltr. (Angraecinae, Orchidaceae) in Central Africa, with the description of a new species restricted to submontane vegetation.}, journal = {Phytotaxa}, volume = {267}, year = {2016}, pages = {165-186}, chapter = {165}, abstract = {

As a preliminary step to the taxonomic revision of the genus Cyrtorchis, a synoptic revision of the species occurring in Central
Africa was undertaken. Based on a detailed examination of 1,039 herbarium specimens, including nomenclatural types,
we have recognized 14 species in Central Africa (one of which is divided into two subspecies), including one new species
that the study brought to light, described here as Cyrtorchis submontana. The new species closely resembles C. guillaumetii
and C. brownii in general aspect, but differs from them in having thinner, small elliptic leaves and shorter, fewer-flowered,
more lax inflorescences with shorter bracts. The species is restricted to submontane vegetation of Central Africa and is assessed
as Endangered following the IUCN Red List Categories and Criteria. Cyrtorchis latibracteata and C. subcylindrifolia
are lectotypified, and the latter is placed as a synonym under C. henriquesiana. Many new records are reported, and for each
taxon the distribution, habitat and ecology are given. An identification key for the Central African taxa is also provided.

}, doi = {dx.doi.org/10.11646/phytotaxa.267.3.1.}, author = {Laura Azandi and Tariq St{\'e}vart and Bonaventure Sonk{\'e} and Murielle Simo-Droissart and Marie-Louise Avana and Vincent Droissart} } @article {92, title = {A taxonomic revision of Angraecum section Dolabrifolia (Orchidaceae, Angraecinae), with the description of a new species from Gabon.}, journal = {Phytotaxa}, volume = {280}, year = {2016}, pages = {81{\textendash}115}, chapter = {81}, abstract = {

Despite a paucity of material available from continental Africa, previous morphological and molecular phylogenetic studies
have suggested that Angraecum, the largest genus of the angraecoid orchids, is polyphyletic. A recent study based on
broad sampling from the region confirmed the monophyly of section Dolabrifolia and a clear delimitation of four of its five
members, one of which represents a new species. Based on these results, a comprehensive taxonomic revision of Angraecum
sect. Dolabrifolia is presented here. It includes an identification key and a detailed description of each species, along with
color photographs, distribution maps, information on habitat and phenology, and a preliminary risk of extinction assessment
according to the IUCN Red List categories and criteria. Species richness in the section is highest in Atlantic Central Africa
and around the Albertine Rift. The new species, A. biteaui, is described and illustrated with line drawings. It most closely
resembles A. aporoides in general aspect but differs in both foliar and floral characters, and is only known from lowland
forests in Gabon.

}, doi = {doi.org/10.11646/phytotaxa.280.2.1}, author = {Murielle Simo-Droissart and Bonaventure Sonk{\'e} and Vincent Droissart and Daniel Geerinck{\textdagger} and Porter P. Lowry II and Tariq St{\'e}vart} }