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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.
In Vietnam, the yam is called củ mài or khoai mài. When this yam is processed to become a medicine, the yam is called hoài sơn or tỳ giải. In the Ilocano of the northern Philippines it is called tuge. In Latin American countries it is known as camote del cerro or white ñame. In Manipuri it is called as "Ha".
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 ]
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.
Diosgenin, a phytosteroid sapogenin, is the product of hydrolysis by acids, strong bases, or enzymes of saponins, extracted from the tubers of Dioscorea wild yam species, such as the Kokoro. It is also present in smaller amounts in a number of other species.
"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 ...
Cassava, yams (Dioscorea spp.), and sweet potatoes (Ipomoea batatas) are important sources of food in the tropics. The cassava plant gives the third-highest yield of carbohydrates per cultivated area among crop plants, after sugarcane and sugar beets . [ 68 ]
Krabèe janèng, Acehnese cuisine made from Dioscorea hispida Several peoples use the tuber as food. The tuber is toxic when fresh due to the presence of saponins and calcium oxalate raphides, so it must be processed prior to consumption, typically by finely slicing into thin strips, placing in a sack or net, and leaving in a stream for a few days until the toxins have leached out.