Pictorial guide to the flora of the British Isles

Home ⟩ Pictorial Guide ⟩ Polygonaceae ⟩ Polygonum oxyspermum / Ray’s knotgrass

Polygonum oxyspermum C. A. Mey. & Bunge

Ray’s knotgrass (Polygonaceae)

 SpreadBias within British IslesDirection of bias
WidespreadNegligible tendencyW
Plant Atlas 2020
BSBI Distribution Map

Synonym | Polygonum raii Bab.

Polygonum oxyspemum is a coastal species with glaucous leaves.

Craighouse (VC102: South Ebudes); 2014-08-15

 Ray’s knotgrass / Polygonum oxyspermum: _Polygonum oxyspemum_ is a coastal species with glaucous leaves.

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