Kew Bulletin

, Volume 64, Issue 3, pp 461–468

Dioscorea orangeana (Dioscoreaceae), a new and threatened species of edible yam from northern Madagascar

Authors

    • Royal Botanic Gardens
  • Annette Hladik
    • UMR 5145 et USM 104, Éco-Anthropologie et EthnobiologieCNRS & Muséum national d’Histoire naturelle
  • Odile Weber
    • Royal Botanic Gardens
  • Claude Marcel Hladik
    • UMR 5145 et USM 104, Éco-Anthropologie et EthnobiologieCNRS & Muséum national d’Histoire naturelle
  • Vololoniana Jeannoda
    • Département de Biologie et Ecologie Végétales, Faculté des SciencesUniversité d’Antananarivo
Article

DOI: 10.1007/s12225-009-9126-2

Cite this article as:
Wilkin, P., Hladik, A., Weber, O. et al. Kew Bull (2009) 64: 461. doi:10.1007/s12225-009-9126-2

Summary

A new species of yam (Dioscorea orangeana Wilkin) is described and illustrated. It differs from D. comorensis R.Knuth by having undulate leaf margins and a broader torus and tepals in both the male and female flowers. In female flowers of D. orangeana the floral stipe between the ovary and the torus is shorter than in D. comorensis. The tuber morphology of the species is atypical among Malagasy species in that there are several digitate lobes rather than a single tuber per growing season, although more research is needed on tuber morphology. D. orangeana is reported to be edible. It is endemic to the Forêt d’Orangea near Diego Suarez (Antsiranana) in Antsiranana Préfecture. Its conservation and sustainable use are thus matters of concern.

Keywords

conservationDioscoreaDioscoreaceaeedibleMadagascarnew speciesyams

Copyright information

© The Board of Trustees of the Royal Botanic Gardens, Kew 2009