About Sweet potato

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Title Sweet potato
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(from Freebase)
The sweet potato (Ipomoea batatas) is a dicotyledonous plant that belongs to the family Convolvulaceae. Its large, starchy, sweet tasting tuberous roots are an important root vegetable (Purseglove, 1991; Woolfe, 1992). The young leaves and shoots are sometimes eaten as greens. Of the approximately 50 genera and more than 1,000 species of Convolvulaceae, I. batatas is the only crop plant of major importance – some others are used locally, but many are actually poisonous. The sweet potato is only distantly related to the potato (Solanum tuberosum). The softer, orange variety is often called a yam in parts of North America, a practice intended to differentiate it from the firmer, white variety. The sweet potato is botanically very distinct from the other vegetable called a yam, which is native to Africa and Asia and belongs to the monocot family Dioscoreaceae. To prevent confusion, the United States Department of Agriculture requires that sweet potatoes labeled as "yams" also be labeled...
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