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Yam is an important dietary element for Nigerian and West African people. It contributes more than 200 calories per person per day for more than 150 million people in West Africa, and is an important source of income. Yam is an attractive crop in poor farms with limited resources. It is rich in starch, and can be prepared in many ways.
Dioscorea alata – also called ube (/ ˈ uː b ɛ,-b eɪ /), ubi, purple yam, or greater yam, among many other names – is a species of yam (a tuber). The tubers are usually a vivid violet - purple to bright lavender in color (hence the common name), but some range in color from cream to plain white.
Dioscorea hastifolia, the Adjigo (ˈadʒɪɡəʊ) yam, also known as the Warram, is a yam with long, white, edible tubers that is native to Southwest Australia.It is a climbing vine with hastate, spearheaded, leaves and bears green triangular fruit.
"Sweet potatoes have a starchy texture and sweet flesh," Gavin said. "The major types are grouped by the color of the flesh, not by the skin." In the grocery store, you'll likely see orange, white ...
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. It is sometimes treated as separate species from Dioscorea cayenensis. [1]
Yams can also grow much larger than sweet potatoes, too—more than five feet long and up to 100 pounds. Like sweet potatoes, though, they're best stored in cool, dark spots.
Dioscorea esculenta, commonly known as the lesser yam, is a yam species native to Island Southeast Asia and introduced to Near Oceania and East Africa by early Austronesian voyagers. It is grown for their edible tubers , though it has smaller tubers than the more widely-cultivated Dioscorea alata and is usually spiny.
A sweet potato is not a type of yam and a yam is not a type of sweet potato. Yams are native to Africa and Asia, and thus over 90% of yam crops are grown in Africa. They are closely related to lilies.