FLORA OF ICELAND elements: Rumex longifolius, northern dock

Rumex longifolius; the Northern Dock is the largest of all dock-species common in Iceland. It has crispy / undulating leaf margins. The leaves are narrow, but unlike the common sorrel and the sheep's sorrel it has no appendages at the base. It is an introduced species and grows in human-disturbed soils (waste dumps, road-sides etc.).
It is a member of the Dock family (Polygonaceae). The Icelandic name of this species is Njóli.

Leaf shapes of the common sorrel species on Iceland

Rumex acetosa Rumex acetosella
   
Rumex longifolius Oxyria digyna

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A brief introduction to Iceland plants
Text & Photographs by Dick Vuijk - unless stated otherwise

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