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Type: Article
Published: 2015-05-29
Page range: 4–23
Abstract views: 22
PDF downloaded: 45

A taxonomic reassessment of Viburnum (Adoxaceae) in the Azores

CIBIO Research Center in Biodiversity and Genetic Resources, CIBIO-Azores, Department of Biology, University of the Azores, Portugal
Department of Life Sciences, The Natural History Museum, Cromwell Road, London, SW7 5BD, UK
Agrocampus Ouest, UMR1345 IRHS, 2 rue Le Nôtre, F-49045 Angers, France INRA, UMR1345 IRHS, F-49071 Beaucouzé, France Université d’Angers, UMR1345 IRHS, F-49100 Angers, France LUNAM Université, France
EEBMO, HSEIT, Angra do Heroísmo, Ilha Terceira, Portugal and Genetics & Arthritis Research Group (GARG), IBMC-Institute for Molecular and Cell Biology, Porto, Portugal
Plant Biodiversity Research, Technische Universität München, D-85354 Freising, Germany
CIBIO Research Center in Biodiversity and Genetic Resources, CIBIO-Azores, Department of Biology, University of the Azores, Portugal
Endemic taxonomy Azores Islands Canary Islands Mediterranean Eudicots

Abstract

The taxonomic status of the Azorean endemic Viburnum tinus subsp. subcordatum is reassessed, using morphological characters and new molecular data from the ITS region and the trnK intron. A survey of morphological variation supports the recognition of V. tinus subsp. subcordatum as distinct from V. tinus subsp. tinus and the Canary endemic V. rugosum (formerly known as V. tinus subsp. rigidum) based on leaf shape, the shape of the leaf base and apex, the sub-entire and revolute leaf margins, blistered upper leaf surfaces, trichome density and type, and fruit size. Molecular data also confirm this distinctiveness within section Tinus. Taken together, our morphological and genetic data presented in this paper support the recognition of the Azorean taxon at the species level under the name of Viburnum treleasei. A description of the species is provided and nomenclatural issues relating to the two Macaronesian Viburnum taxa are discussed.