Taxonomy of Atlantic Central African orchids 5. A new species of Angraecum sect. Conchoglossum (Orchidaceae, Angraecinae) from Gabon and Cameroon

By

Ječmenica, Vladimir
Droissart, Vincent
Noret, Nausicaa
Stévart, Tariq

Type

Article

Date of Publication

2016

Original Publication

PhytoKeys

Volume

61

Pages

61-71

Subjects

Angraecoid , Campo-Ma’an National Park , IUCN Red List Categories and Criteria , Ivindo National Park , Monts de Cristal National Park

Contributed by

Pensoft Publishers

Language

English

Published by

Sofia, Bulgaria Pensoft Publishers [2010]-

Identifiers

DOI: https://doi.org/10.3897/phytokeys.61.7017

 

Abstract

Recent field inventories and taxonomic research in Central Africa have resulted in the discovery of many new orchid species. Five specimens of an apparently new Angraecum species were collected in Gabon and Cameroon. They stand out for their hanging habit and short zig-zag stem. Morphology of leaves and habit is somewhat comparable to A. cultriforme and A. stolzii, two species from East Africa. Flowers of the novelty share the general morphology of A. pyriforme from which the new species is distinguished by being smaller and with a different lip-spur ratio. Here we show that these five specimens represent a new species, described here as Angraecum lanceolatum. The distinguishing traits include thin lanceolate leaves, convolute distally, with a rhombic lip shape. Dichotomous key to four Central African species of sect. Conchoglossum and a table of the diagnostic characters of the seven related Continental African Angraecum taxa are included here. A preliminary assessment of the conservation status of A. lanceolatum is provided, using the IUCN Red List Categories and Criteria.