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On the monophyly of Dactylorhiza Necker ex Nevski (Orchidaceae): is Coeloglossum viride (L.) Hartman a Dactylorhiza?

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Previous phylogenetic analyses of Orchidaceae subtribe Orchidinae resulted in the proposal to classify Coeloglossum viride (L.) Hartman within the genus Dactylorhiza in order to maintain its monophyly. In this paper, we report some results that contradict previous studies regarding the monophyly of the traditional Dactylorhiza and its phylogenetic relationship with Coeloglossum. Our results, which combine sequences of the internal and external transcribed spacers of the nuclear ribosomal DNA, support the monophyly of Dactylorhiza, with Coeloglossum being a sister clade. The position of C. viride in the phylogenetic tree, and the considerable morphological differences with respect to Dactylorhiza, incline us to retain both lineages as distinct genera. © 2006 The Linnean Society of London, Botanical Journal of the Linnean Society, 2006, 152, 261–269.
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Keywords: Wilcoxon signed-rank test; external transcribed spacer; internal transcribed spacer nuclear ribosomal DNA

Document Type: Research Article

Affiliations: 1: Biodiversity Research Centre, Unit of Ecology and Biogeography, Université Catholique de Louvain, Place Croix du Sud, 4–5, B-1348 Louvain-la-Neuve, Belgium 2: National Botanic Garden of Belgium, Domein van Bouchout, B-1860 Meise, Belgium

Publication date: 01 November 2006

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