A taxonomic revision of the genus Flagenium Baill. (Rubiaceae–Octotropideae) |
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Authors: | MARKUS RUHSAM AARON P. DAVIS fls |
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Affiliation: | The Herbarium, Royal Botanic Gardens, Kew, Richmond, Surrey, TW9 3AE, UK; University of Edinburgh, Institute of Evolutionary Biology, Ashworth Laboratories, West Main Road, Edinburgh, EH9 3JT, UK |
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Abstract: | A taxonomic revision of the genus Flagenium Baill. is presented. Flagenium is endemic to Madagascar and comprises six species; three new species are described here ( F. farafanganensis , F. petrikensis , and F. pedunculatum ) and one species ( F. arboreum ) is transferred into synonymy. Each species is fully described, and summaries of distribution, habitat and ecology, and phenology are given; conservation assessments are provided for each species. Flagenium is characterized by having ovaries with at least two erect and two pendulous ovules per locule, which, depending on the species, can display an additional two to four horizontal ovules per locule arranged between the uppermost and lowermost ovules. In addition, Flagenium has a longitudinally ten-ribbed fruit. These features are potentially unique within the Octotropideae. © 2007 The Linnean Society of London, Botanical Journal of the Linnean Society , 2007, 155 , 557–570. |
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Keywords: | conservation ilmenite IUCN Red List Categories Madagascar mining ovary morphology |
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