Pictorial guide to the flora of the British Isles

Home ⟩ Pictorial Guide ⟩ Salviniaceae ⟩ Azolla filiculoides / water fern

Azolla filiculoides Lam.

water fern (Salviniaceae)

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

The fronds of Azolla filiculoides are very small and overlapping, and turn red over winter.

Oxford (VC23: Oxfordshire); 2012-03-24

 water fern / Azolla filiculoides: The fronds of _Azolla filiculoides_ are very small and overlapping, and turn red over winter.

Azolla filiculoides is our only floating fern, and can blanket large areas of standing or slow-flowing water.

Oxford (VC23: Oxfordshire); 2011-08-31

 water fern / Azolla filiculoides: _Azolla filiculoides_ is our only floating fern, and can blanket large areas of standing or slow-flowing water.

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