Dioscorea cayenensis subsp. rotundata, commonly known as the white yam, West African yam,[1]Guinea yam, or white ñame, is a subspecies[2] of yam native to Africa. It is one of the most important cultivated yams.[3]Kokoro is one of its most important cultivars.
Its wild progenitor is Dioscorea praehensilis[1] and possibly also D. abyssinica (by hybridization).[4] Domestication occurred in West Africa, along the south-facing Atlantic coast. There is insufficient documentation and as of 2009[update] insufficient research to determine how long ago that occurred.[5]
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