Vegetable
Dioscorea
S tier
Dioscorea is the true yam genus—tropical vines storing large starchy tubers distinct from orange sweet potatoes mislabeled yams in the US. Flesh may be white, yellow, or purple; texture is dry to sticky by species. West African, Caribbean, and Pacific cuisines centre true yams. Boil, pound, fry, or roast after thorough cooking; some wild species need detox. Genus-level identity covers culinary Dioscorea. Buy from tropical markets for authentic tubers.
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History
Independent domestication of Dioscorea yams occurred in Africa, Asia, and the Pacific.
Atlantic trade moved African yams into Caribbean food systems.
US soft drinks and markets confused sweet potatoes with yams in naming.
True Dioscorea yams remained staples across tropical food cultures.