great water dock

Rumex hydrolapathum is a tall perennial herb that grows in fens and along freshwater banks. It is distributed across the Palaearctic region, including countries such as Flanders, Bulgaria, SE, FK, NO, DK, JP, Albania, Austria, the Baltic States, Belarus, Belgium, Central European Russia, Czechoslovakia, Denmark, East European Russia, and Finland. First described in 1778, this species is distinguished by its height and decaploid chromosome count. It is commonly referred to as great water dock, water dock, or giant water dock.