Fagopyrum tataricum

Tartary buckwheat (Fagopyrum tataricum) also known as duckwheat, India buckwheat, India wheat, green buckwheat, or bitter buckwheat, is a domesticated food plant in the genus Fagopyrum (sometimes merged into the genus Polygonum) in the family Polygonaceae. With another species in the same genus, common buckwheat, it is often counted as a cereal, but unlike the true cereals the buckwheats are not members of the grass family. Thus they are not related to true wheat. Tartary buckwheat is bitterer, but contains more rutin than common buckwheat. It also contains quercitrin.
Tartar buckwheat was domesticated in east Asia. While it is unfamiliar to the West, it is still eaten in the Himalayan region today, as well as other regions in Southwest China such as Guizhou province.
References
External links

Media related to Fagopyrum tataricum at Wikimedia Commons

...