Photo: Bistorta major 5.

Closeup of flower. Kenkävero garden, Mikkeli, Finland. Planted. 2000-09-09.
Bistorta major Gray Engl.: common bistort, adderwort, bistort, dragonwort, easter giants, easter mangiants, easter-ledge, easter-mangiant, meadow bistort, oderwort, osterick, passion dock, patience dock, snakeweed, twice writhen. Deu.: Wiesenknöterich, Schlangen-Knöterich, Wiesen-Knöterich. Suom.: konnantatar. Sven.: stor ormrot, ormrot. TCM: quan shen. Bot. syn.: Persicaria bistorta (L.) Samp., Polygonum bistorta L.
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Photo: Bistorta major 5.