Buckwheat refers to plants in two genera of the dicot family Polygonaceae: the Eurasian genus Fagopyrum, and the North American genus Eriogonum. The crop plant, common buckwheat,'s Fagopyrum esculentum. Tartary buckwheat (F. tataricum Gaertn.) or "bitter buckwheat"'s also used as a crop, but it's much less common. Despite the common name and the grain-like use of the crop, buckwheat isn't a cereal or grass. It's called a pseudocereal to emphasize that it isn't related to wheat. The agricultura… (More on Buckwheat)