Dioscorea cayenensis

Dioscorea cayenensis is a species of yam in the genus Dioscorea that is a widely consumed West African domesticated crop. Dioscorea rotundata is sometimes treated as a subspecies, and sometimes also as a separate species.^[1] Common names include Guinea yam, yellow yam, and yellow Guinea yam.

Dioscorea cayenensis
Scientific classification
Kingdom:	Plantae
Clade:	Tracheophytes
Clade:	Angiosperms
Clade:	Monocots
Order:	Dioscoreales
Family:	Dioscoreaceae
Genus:	Dioscorea
Species:	D. cayenensis
Binomial name
Dioscorea cayenensis Lam.
Synonyms
Dioscorea cayenennsis (unjustified correction)

It may be a triploid hybrid between the cultivated D. rotundata and the wild D. burkilliana.^[2]