Fallopia convolvulus, the black-bindweed or wild buckwheat, is a fast-growing annual flowering plant in the family Polygonaceae native throughout Europe, Asia and northern Africa.

[3][4] Other old folk names include bear-bind, bind-corn, climbing bindweed, climbing buckwheat, corn-bind, corn bindweed, devil's tether, and wild buckwheat.

The flowers are small, and greenish-pink to greenish white, clustered on short racemes.

[5] Fallopia convolvulus grows most commonly on disturbed or cultivated land, in northern Europe typically on warm, sunny, well-drained sandy or limestone soil types,[5][7] but in hotter, drier areas like Pakistan, on moist shady sites.

[3][4][5] The seeds are edible, and were used in the past as a food crop, with remains found in Bronze Age middens.