Pictorial guide to the flora of the British Isles

Home ⟩ Pictorial Guide ⟩ Onagraceae ⟩ Epilobium tetragonum / square-stalked willowherb

Epilobium tetragonum L.

square-stalked willowherb (Onagraceae)

 SpreadBias within British IslesDirection of bias
Very widespreadStrong tendencySE
Plant Atlas 2020
BSBI Distribution Map

Epilobium tetragonum is common across most of England and Wales, but is rarer in Scotland and Ireland.

Oxford (VC23: Oxfordshire); 2013-07-06

 square-stalked willowherb / Epilobium tetragonum: _Epilobium tetragonum_ is common across most of England and Wales, but is rarer in Scotland and Ireland.

Epilobium tetragonum is very close to E. obscurum, but has longer capsules and no patent glandular hairs on the hypanthium.

Oxford (VC23: Oxfordshire); 2013-07-06

 square-stalked willowherb / Epilobium tetragonum: _Epilobium tetragonum_ is very close to _E. obscurum_, but has longer capsules and no patent glandular hairs on the hypanthium.

All images copyright © Christopher J. Dixon unless otherwise indicated.

L-R: Bidens tripartita, Melilotus officinalis, Mimulus guttatus, Thalictrum flavum, Ranunculus peltatus, Anchusa arvensis, Malva alcea, Lolium perenne