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Speciation in the genera Anthericum and Chlorophytum (Asparagaceae) in Ethiopia—a molecular phylogenetic approach

Charlotte Sletten Bjorå, MARTE ELDEN, INGER NORDAL, ANNE K. BRYSTING, TESFAYE AWAS, SEBSEBE DEMISSEW, MIKA BENDIKSBY

Abstract


Sister group relations of Ethiopian species of Anthericum and Chlorophytum and variation patterns in the C. gallabatense and C. comosum complexes were studied using molecular phylogenetic analyses, morphometrics, and scanning electron microscopy of seed surfaces. Results indicate that molecular data largely support previous morphological conclusions, and that speciation has occurred in Ethiopia at least three times in Anthericum and repeatedly within different subclades of Chlorophytum. Areas particularly rich in endemic species are the lowland area around Bale Mountains in SE Ethiopia and in the Beninshangul Gumuz regional state in W Ethiopia near the border to Sudan. A new species, Chlorophytum mamillatum Elden & Nordal, is described, and the names C. tordense and C. tetraphyllum are re-instated.


Keywords


Anthericaceae, endemism, Horn of Africa, sister group relations, taxonomy, monocots

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DOI: http://dx.doi.org/10.11646/phytotaxa.297.2.2

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ISSN 1179-3155 (print); ISSN 1179-3163 (online)

Published by Magnolia Press, Auckland, New Zealand