Perennial buckwheat, Fagopyrum dibotrys
The leaves are eaten raw or cooked, boiled or steamed and used like spinach.
Of excellent quality according to one report, but we (Ken Fern) have been less than impressed by the flavour, which has a distinct bitterness especially when eaten raw.
The leaves are rich in rutin which inhibits carcinogenesis and protects against radiation, and so they do make a healthy addition to the diet.
The seed can be sprouted and eaten raw, or cooked and used as a cereal.
Dried and ground into a powder, it can serve as a thickening agent in soups etc.
The seed is rich in vitamin B6. Unfortunately, it is not freely produced in Britain.
The whole plant stimulates blood circulation. A decoction is used in the treatment of traumatic injuries, menstrual irregularities, purulent infections, snake and insect bites.
A decoction of the roots is used in the treatment of insect bites, inflammation, snakebite and traumatic injuries.