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Cassava (Manihot esculenta), also called yuca or manioc, a woody shrub of the Euphorbiaceae (spurge family) native to South America, is extensively cultivated as an annual crop in tropical and subtropical regions for its edible starchy tuberous root, a major source of carbohydrates. Nigeria is the world's largest producer of cassava. Note: mind 2 different plants that just change 1 letter: Yucca and Yuca. Cassava is the third-largest source of carbohydrates for meals in the world. It is classified as sweet or bitter, depending on the level of toxic cyanogenic glucosides. (However, bitter taste is not always a reliable measure.) Improper preparation of cassava can leave enough residual cyanide to cause acute cyanide intoxication and goiters, and has been linked to ataxia or partial paralysis. Nevertheless, farmers often prefer the bitter varieties because they deter pests, animals, and thieves. In some locations the more toxic varieties serve as a fall-back resource (a "food security crop") in times of famine. source: http://en.wikipedia.org/wiki/Cassava
grown on the side of the street as food crop or as additional income for farmers.