I have read that some native Americans around the Great Lakes supplemented their diet by collecting a kind of wild rice that grows along lakes and streams and in other wetlands. As far as I know, this kind of rice was never domesticated and never became a major food source, either for the Native Americans or for white settlers who displaced them.
What if this rice was of a different species, one that was more productive and more amenable to being domesticated?
What if this rice was of a different species, one that was more productive and more amenable to being domesticated?