Pictorial guide to the flora of the British Isles

Home ⟩ Pictorial Guide ⟩ Araceae ⟩ Spirodela polyrhiza / greater duckweed

Spirodela polyrhiza (L.) Schleid.

greater duckweed (Araceae)

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

Spirodela polyrhiza is a large duckweed, up to 10 mm across, with several rootlets dangling from each frond.

Wolvercote (VC23: Oxfordshire); 2018-06-01

 greater duckweed / Spirodela polyrhiza: _Spirodela polyrhiza_ is a large duckweed, up to 10 mm across, with several rootlets dangling from each frond.

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