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Kew Bulletin 64 (2009) 461–468

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

Paul Wilkin (  Auteur correspondant ) 1, Annette Hladik 1, Odile Weber 1, Claude Marcel Hladik 1, Vololoniaina Jeannoda (  Auteur correspondant ) 1

(2009)

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.

1 :	Eco-Anthropologie et Ethnobiologie (EAE)
	Muséum National d'Histoire Naturelle : USM104 – CNRS : UMR7206 – Université Paris VII - Paris Diderot

Domaine

:

Sciences de l'environnement

Mots Clés : Dioscoreaceae – Dioscorea – yams – Madagascar – new species – edible – conservation

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Contributeur : Annette Hladik <>

Soumis le : Mardi 14 Décembre 2010, 17:13:19

Dernière modification le : Mercredi 15 Décembre 2010, 11:36:04