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Issue: Vol. 374 No. 2: 5 November 2018
Type: Article
Published: 2018-11-05
DOI: 10.11646/phytotaxa.374.2.6
Page range: 147–154
Abstract views: 23
PDF downloaded: 2

A new species of Gomesa (Oncidiinae, Orchidaceae) from inselbergs in Brazilian caatinga: morphological and karyological evidence

Universidade Federal da Paraíba Centro de Ciências Agrárias, Departamento de Ciências Biológicas, Campus II, 58397-000 Areia, Paraíba, Brazil
Universidade Federal Rural de Pernambuco, Centro de Ciências Biológicas, Departamento de Botânica, Rua Manuel de Medeiros, S/N, Dois irmãos, 52171–900 Recife, Pernambuco, Brazil
Universidade Federal Rural de Pernambuco, Centro de Ciências Biológicas, Departamento de Botânica, Rua Manuel de Medeiros, S/N, Dois irmãos, 52171–900 Recife, Pernambuco, Brazil
Science Directorate, Royal Botanic Gardens, Kew, Richmond, Surrey TW7 3DS, UK School of Biological Sciences, The University of Western Australia, Crawley, Western Australia, 6009 Australia
Universidade Federal da Paraíba Centro de Ciências Agrárias, Departamento de Ciências Biológicas, Campus II, 58397-000 Areia, Paraíba, Brazil
Brazilian flora granite outcrop polyploidy rock outcrop speciation Monocots

Abstract

We describe a new species of Gomesa (Oncidiinae, Orchidaceae), Gomesa caatingana, with restricted distribution on caatinga inselbergs in Paraíba and Pernambuco States, Brazil. Morphological and karyological characters of the new species were compared with those of Gomesa flexuosa, which is morphologically the most closely related species. Differences in geographical distribution, habit, flower morphology and chromosome number support description of this new species.