- a European plant, Polygonum bistorta, of the buckwheat family, having a twisted root, which is sometimes used as an astringent.
- any of several related plants, as P. viviparum(alpine bistort ).
- a Eurasian polygonaceous plant, Polygonum bistorta, having leaf stipules fused to form a tube around the stem and a spike of small pink flowers
- a related plant, Polygonum bistortoides, of W North America, with oval clusters of pink or white flowers
- any of several other plants of the genus Polygonum
