This pondweed is sometimes confused with another which also has linear leaves: P. berchtoldlii (Small Pondweed) and so we needed our Wild Flower Society expert to identify it to be sure. The characters are very similar and need familiarity (which I don't possess) to distinguish them.

Potamogeton pusillus is found throughout the British Isles with slightly less frequency than P. berchtoldii but is rare in northern Scotland and southern Ireland.

Ditch at Southease, East Sussex 8th July 2007

Added on 9th February 2008, updated 20th July 2011