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Wild rice (also called Canada rice, Indian rice, and water oats) are four species of grasses forming the genus Zizania, and the grain that can be harvested from them. The grain was historically gathered and eaten in both North America and China. While it is now a delicacy in North America, the grain is eaten less in China, where the plant's stem is used as a vegetable.
Three species of wild rice are native to North America:
* Northern wild rice (Zizania palustris) is an annual plant native to the Great Lakes region of North America, the aquatic areas of the Boreal Forest regions of Northern Ontario, Alberta, Saskatchewan and Manitoba in Canada and Minnesota, Wisconsin and Michigan in the US.
* Wild rice (Z. aquatica), also an annual, grows in the Saint Lawrence River and on the Atlantic and Gulf coasts of the United States.
* Texas wild rice (Z. texana) is a perennial plant found only in a small area along the San Marcos River in central Texas.
One species is native to Asia:
* Manchurian wild rice (Z. latifolia; incorrect synonym: Z. caduciflora), is a perennial native to China.