Phylogenetic relationships of Scaphyglottis and related genera (Laeliinae: Orchidaceae) based on nrDNA ITS sequence data |
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| Authors: | Robert L. Dressler W. Mark Whitten Norris H. Williams |
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| Affiliation: | (1) Florida Museum of Natural History, USA;(2) Missouri Botanical Garden, USA;(3) Marie Selby Botanical Garden, USA;(4) 21305 NW 86th Ave., 32667 Micanopy, FL;(5) Florida Museum of Natural History, University of Florida, P.O. Box 117800, 32611-7800 Gainesville, FL |
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| Abstract: | Sequences of the nuclear ribosomal internal transcribed spacer regions 1 & 2 (nrDNA ITS) including the intervening 5.8S region were analyzed cladistically for 43 individuals of 35 species ofScaphyglottis s.l. plus two outgroup taxa. Low levels of sequence divergence do not allow estimation of relationships among most clades, but the analyses indicate that four segregate genera (Hexisea Lindl.,Reichenbachanthus Barb. Rodr.,Hexadesmia Brogn., andPlatyglottis coriacea L.O. Williams) are embedded within a broad paraphyleticScaphyglottis. This broadly definedScaphyglottis sensu Dressler is characterized within Laeliinae by the usual presence of superposed growth habit and the presence of a column foot. In order to accommodate species formerly placed inPlatyglottis andReichenbachanthus, three new combinations are made inScaphyglottis:Scaphyglottis brasiliensis (Schltr.) Dressler,S. coriacea (L. O. Williams) Dressier, andS. emarginata (Garay) Dressler. |
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| Keywords: | Orchidaceae Laeliinae Scaphyglottis Hexisea Reichenbachanthus Platyglottis ITS |
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