Pictorial guide to the flora of the British Isles

Hydrilla verticillata (L. f.) Royle

Esthwaite waterweed (Hydrocharitaceae)

SpreadBias within British IslesDirection of bias
Very localStrong tendencyW

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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