Dioscorea dumetorum

Dioscorea dumetorum, also known as the bitter yam, cluster yam, or three-leaved yam, is a species of yam in the genus "Dioscorea" that is found in Africa.
Description.
"D. dumetorum" has distinctive trifoliate leaves, similar to the Indian three-leaf yam "Dioscorea hispida".
Its wild form is highly toxic due to the high content of dihydrodioscorine, which is used for making arrow poison in some areas. In order to remove toxins, the wild form needs to be leached in water for days and thoroughly cooked.
"D. dumetorum" is mainly cultivated in the Bight of Biafra region from southeast Nigeria to Gabon, as well in the Ubangi-Shari region of inland Central Africa.
Vernacular names.
Local names for "D. dumetorum" in West African languages: