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Wild rice and Pesach

Wild rice (AKA as crazy oats) contrary to its names is not in fact rice or oats. It is in fact a type of grass https://en.m.wikipedia.org/wiki/Wild_rice. Since t's not a legume and did not exist in Europe is this kitnyot? Is there a minhag which added on wild rice as kitnyot? Or is this like quinoa (which many hold was not part of the original minhag and so is fine) ?