Pictorial guide to the flora of the British Isles

Wolffia columbiana H. Karst

Columbian duckweed (Araceae)

(No geographical data available.)

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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