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30 May 2019 Encyclia, Epidendrum, or Prosthechea? Clarifying the Phylogenetic Position of a Rare Amazonian Orchid (Laeliinae-Epidendroideae-Orchidaceae)
Viviane Pagnussat Klein, Edlley Max Pessoa, Layon Oreste Demarchi, Mariela Sader, Maria Teresa Fernandez Piedade
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Abstract

The phylogenetic position of a rare orchid species, which was described by Mansfeld from the Brazilian Amazon, is discussed. Although originally described under Epidendrum despite having a column that is not fully adnate to the lip claw, a feature not common in this genus, Epidendrum apuahuense has been transferred to Encyclia and Prosthechea by other authors. About 90 yr after its description, we found a new population of this species in Brazil, which allowed us to study its taxonomy. A phylogenetic reconstruction was performed using nuclear (ITS rDNA) and plastid (matK exon, rpl32-trnL spacer, trnL intron, and trnL-trnF spacer) datasets, aiming to clarify the generic placement of this taxon. Our results strongly support keeping E. apuahuense under Epidendrum. We also neotypify this name, since the original specimens were destroyed and no illustration is available. The morphological affinities of E. apuahuense and allied taxa are discussed.

© Copyright 2019 by the American Society of Plant Taxonomists
Viviane Pagnussat Klein, Edlley Max Pessoa, Layon Oreste Demarchi, Mariela Sader, and Maria Teresa Fernandez Piedade "Encyclia, Epidendrum, or Prosthechea? Clarifying the Phylogenetic Position of a Rare Amazonian Orchid (Laeliinae-Epidendroideae-Orchidaceae)," Systematic Botany 44(2), 297-309, (30 May 2019). https://doi.org/10.1600/036364419X15562054132983
Published: 30 May 2019
KEYWORDS
Brazil
cladistics
Neotropics
nomenclature
taxonomy
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