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Yam is the common name for some plant species in the genus Dioscorea (family Dioscoreaceae) that form edible tubers (some other species in the genus being toxic). Yams are perennial herbaceous vines native to Africa, Asia, and the Americas and cultivated for the consumption of their starchy tubers in many temperate and tropical regions.
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.
Amorphophallus paeoniifolius, the elephant foot yam [4] or whitespot giant arum, [5] [6] is a tropical plant native to Island Southeast Asia. It is cultivated for its edible tubers in Southeast Asia, South Asia, Madagascar, New Guinea, and the Pacific islands.
Dioscorea bulbifera (commonly known as the air potato, air yam, bitter yam, cheeky yam, potato yam, [2] aerial yam, [3] and parsnip yam [4]) is a species of true yam in the yam family, Dioscoreaceae. It is native to Africa, Asia and northern Australia. [ 1 ]
The name yam came from the West African words nyam, nyami or enyame, which means "to eat." What Is a Sweet Potato? A sweet potato is a a root tuber native to Central and South America.
Dioscoreaceae (/ ˌ d aɪ ə ˌ s k ɔːr i ˈ eɪ s i i /) is a family of monocotyledonous flowering plants, with about 715 known species in nine genera. [4] The best-known member of the family is the yam (some species of Dioscorea). The APG system (1998) and APG II system (2003) both place it in the order Dioscoreales, in the clade monocots.
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]
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.