Wild Rice - Species

Species

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 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.

Texas wild rice is in danger of extinction due to loss of suitable habitat in its limited range and to pollution. The pollen of Texas wild rice can only travel about 30 inches away from a parent plant. If pollen does not land on a receptive female flower within that distance, no seeds are produced. Manchurian wild rice has almost disappeared from the wild in its native range, but has been accidentally introduced into the wild in New Zealand and is considered an invasive species there.