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Issue: Vol. 349 No. 3: 15 May 2018
Type: Article
Published: 2018-05-15
DOI: 10.11646/phytotaxa.349.3.5
Page range: 247–256
Abstract views: 28
PDF downloaded: 1

A revised concept of Rhipidoglossum (Angraecinae, Orchidaceae)

Herbarium et Bibliothèque de Botanique africaine, C.P. 265, Université Libre de Bruxelles Plant Ecology and Biogeochemistry, C.P. 244, Université Libre de Bruxelles
Herbarium et Bibliothèque de Botanique africaine, C.P. 265, Université Libre de Bruxelles, Campus de la Plaine, Boulevard du Triomphe 1050, Brussels, Belgium Plant Ecology and Biogeochemistry, C.P. 244, Université Libre de Bruxelles, Campus de la Plaine, Boulevard du Triomphe, 1050, Brussels, Belgium
UMR 7207 CNRS-MNHN-UPMC, Centre de Recherche sur la Paléobiodiversité et les Paléoenvironnements, 57 rue Cuvier, CP 48, FR 75005, Paris, France
Herbarium et Bibliothèque de Botanique africaine, C.P. 265, Université Libre de Bruxelles, Campus de la Plaine, Boulevard du Triomphe 1050, Brussels, Belgium AMAP, IRD, CIRAD, CNRS, INRA, Univ de Montpellier Missouri Botanical Garden, Africa and Madagascar Department, P.O. Box 299, St. Louis, Missouri 63166-0299, USA
Plant Systematics and Ecology Laboratory, Higher Teachers’ Training College, University of Yaoundé I, P.O. Box 047, Yaoundé, Cameroon
Herbarium et Bibliothèque de Botanique africaine, C.P. 265, Université Libre de Bruxelles, Campus de la Plaine, Boulevard du Triomphe 1050, Brussels, Belgium Missouri Botanical Garden, Africa and Madagascar Department, P.O. Box 299, St. Louis Botanic Garden Meise Botanic Garden Meise, Domein van Bouchout, Nieuwelaan 38, B-1860 Meise, Belgium
African orchids angraecoids Angraecopsis Cribbia Diaphananthe Epidendroideae Margelliantha Mystacidium orchid taxonomy Rhaesteria Sphyrarhynchus stigmatic callus Vandeae Monocots

Abstract

Following the production of a near-comprehensive generic phylogenetic analysis of African angraecoid orchids, paraphyly of the genus Rhipidoglossum relative to Cribbia, Margelliantha and Rhaesteria was in need of being resolved by integrating morphological observations into this newly available molecular framework. Accordingly, we critically revised the diagnostic traits of each genus by examining about 700 herbarium specimens ascribable to 50 species of Rhipidoglossum and its satellite genera. Cribbia, Margelliantha and Rhaesteria are here lumped with Rhipidoglossum, along with Angraecopsis pusilla and Diaphananthe millarii. The presence of pollinaria with two separate disk-shaped viscidia, a trilobed, non-papillate rostellum with midlobe more prominent than lateral lobes and an undivided lip are diagnostic of this more inclusive concept of Rhipidoglossum. In line with this new taxonomic arrangement, 11 new combinations in Rhipidoglossum are made, and Margelliantha lebelii is moved to Diaphananthe and first reported for Uganda.