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      The identity of Albuca caudata Jacq. (Hyacinthaceae) and a description of a new related species: A. bakeri

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          Abstract

          Abstract

          The name Albuca caudata Jacq. has been widely misunderstood or even ignored since its description in 1791. After studying herbarium specimens and living populations in South Africa, plants fitting Jacquin´s concept of that species are found to be widely distributed in the Eastern Cape, mainly in the Albany centre of Endemism. Furthermore, some divergent specimens matching Baker´s concept of Albuca caudata are described as a new related species: Albuca bakeri . Data on typification, morphology, ecology, and distribution are reported for both taxa. Affinities and divergences with other close allies are also discussed.

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          Molecular phylogenetics of subfamily Ornithogaloideae (Hyacinthaceae) based on nuclear and plastid DNA regions, including a new taxonomic arrangement.

          The taxonomic arrangement within subfamily Ornithogaloideae (Hyacinthaceae) has been a matter of controversy in recent decades: several new taxonomic treatments have been proposed, based exclusively on plastid DNA sequences, and these have resulted in classifications which are to a great extent contradictory. Some authors have recognized only a single genus Ornithogalum for the whole subfamily, including 250-300 species of variable morphology, whereas others have recognized many genera. In the latter case, the genera are inevitably much smaller and they are better defined morphologically. However, some are not monophyletic as circumscribed. Phylogenetic analyses of Ornithogaloideae were based on nucleotide sequences of four plastid regions (trnL intron, trnL-F spacer, rbcL and matK) and a nuclear region (ITS). Eighty species covering all relevant taxonomic groups previously recognized in the subfamily were sampled. Parsimony and Bayesian analyses were performed. The molecular data were compared with a matrix of 34 morphological characters. Combinations of plastid and nuclear data yielded phylogenetic trees which are better resolved than those obtained with any plastid region alone or plastid regions in combination. Three main clades are found, corresponding to the previously recognized tribes Albuceae, Dipcadieae and Ornithogaleae. In these, up to 19 clades are described which are definable by morphology and biogeography. These mostly correspond to previously described taxa, though some need recircumscription. Morphological characters are assessed for their diagnostic value for taxonomy in the subfamily. On the basis of the phylogenetic analyses, 19 monophyletic genera are accepted within Ornithogaloideae: Albuca, Avonsera, Battandiera, Cathissa, Coilonox, Dipcadi, Eliokarmos, Elsiea, Ethesia, Galtonia, Honorius, Loncomelos, Melomphis, Neopatersonia, Nicipe, Ornithogalum, Pseudogaltonia, Stellarioides and Trimelopter. Each of these has a particular syndrome of morphological characters. As a result, 105 new combinations are made and two new names are proposed to accommodate the taxa studied in the new arrangement. A short morphological diagnosis, synonymy, details of distribution and an identification key are presented.
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            A molecular phylogeny and a revised classification of Ornithogaloideae (Hyacinthaceae) based on an analysis of four plastid DNA regions

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              Enumeratio Albucarum (Hyacinthaceae) Austro-Africanarum adhuc cognitarum 1 Subgenus Albuca

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                Author and article information

                Journal
                PhytoKeys
                PhytoKeys
                PhytoKeys
                Pensoft Publishers
                1314-2011
                1314-2003
                2011
                27 July 2011
                : 5
                : 5-19
                Affiliations
                [1 ]CIBIO (Instituto Universitario de la Biodiversidad), Universidad de Alicante, P.O. Box 99, E-03080 Alicante, Spain
                [2 ]Selmar Schonland Herbarium, Department of Botany, Rhodes University, Grahamstown 6140, South Africa
                [3 ]Department of Botany, Rhodes University, Grahamstown, 6140, South Africa
                Author notes
                Corresponding author: Mario Martínez-Azorín ( mmartinez@ 123456ua.es ).

                Academic editor: W. John Kress

                Article
                10.3897/phytokeys.5.1166
                3174447
                22171189
                10633f80-31ad-4c97-ae43-4d08a6335e40
                Mario Martínez-Azorín, Manuel B. Crespo, Anthony P. Dold, Nigel P. Barker

                This is an open access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.

                History
                : 24 February 2011
                : 13 June 2011
                Categories
                Article

                Plant science & Botany
                albuca bakeri sp. nov.,typification,distribution,albuca caudata,taxonomy
                Plant science & Botany
                albuca bakeri sp. nov., typification, distribution, albuca caudata, taxonomy

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