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Persicaria bistorta (Bistort or Common Bistort) is a herbaceous flowering plant found throughout Europe. The generic placement of this species is in flux. While treated here as in Persicaria, it has also been placed in Polygonum or Bistorta.
The Latin name "bistorta" refers to the twisted appearance of the root. The plant was used to make a bitter pudding in Lent from a combination of the plant's leaves, oatmeal, egg and other herbs. It is the principal ingredient of dock pudding.
Numerous other vernacular names have been recorded for the species in historical texts, though none is used to any extent. Many of the following refer to the plant's use in making puddings: Adderwort, Dragonwort, Easter giant, Easter ledger, Easter ledges, Easter magiant, Easter man-giant, Gentle dock, Great bistort, Osterick, Oysterloit, Passion dock, Patience dock (this name is also used for Rumex patienta), Patient dock, Pink pokers, Pudding grass, Pudding dock, Red legs, Snakeweed, Twice-writhen, Water ledges.
Common bistort stem.
The large-flowered cultivar Persicaria bistorta 'Superba' is grown as an ornamental plant.
In Vitosha, Bulgaria
