n.
Either of two species ( Fagopyrum esculentum , or sagittatum , and F. tataricum ) of herbaceous plants and their edible, triangular seeds, used as a cereal grain though the plant is not a cereal grass .
It is less productive than other grain crops on good soils but is particularly adapted to arid, hilly land and cool climates. Because it matures quickly, it can be grown as a late-season crop. It improves conditions for the cultivation of other crops by smothering weeds and may be planted as a green-manure crop. Buckwheat is often used as a feed for poultry and other livestock. It is high in carbohydrates and is about 11% protein and 2% fat. The hulled kernels, or groats, can be cooked and served much like rice. Buckwheat flour is unsatisfactory for bread but is used to make pancakes ("buckwheat cakes").