| Family | Scientific Name | Common Name | Habitat | Distribution | Image |
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| Poaceae | Zizania aquatica var. aquatica | Southern Wild-rice | Freshwater marshes, usually tidal. | Var. aquatica ranges from ME west to WI, south to c. peninsular FL and LA. | 
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| Poaceae | Zizania palustris var. interior | Interior Wild-rice | Swamps, ponds, other wetlands. | ON west to MN, south to KY, MO, n. AR, and NE. | 
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| Poaceae | Zizania palustris var. palustris | Northern Wild-rice | Lake shores. | NS west MB, south to s. NY, nw. PA, n. IN, n. IL, IA, and SD; disjunct in n. WV. | 
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| Poaceae | Zizania texana | Texas Wild Rice | In cool spring water of the San Marcos River, just below the Balcones Escarpment. | Endemic to the uppermost 4 km of the San Marcos River, Hays County, TX. | 
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