Photo: Rumex longifolius.

Flowering plant. This one is quite close to yellow dock (Rumex crispus) in action. Remember, the yellower the root the better the medicine. Perheniemi, Finland. Wild. 2000-07-05.
Rumex longifolius DC. Engl.: northern dock. Deu.: Gemüse-Ampfer. Suom.: hevonhierakka. Sven.: gårdsskräppa, gårdssyra. Bot. syn.: Rumex domesticus Hartm.
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Photo: Rumex longifolius.