This water plant is about twice or threes times the size (diameter) of the Callitriche stagnalis (Common Water-starwort) which is found often floating in large patches on top of water in ponds, ditches and even in ruts in fields.

It is common in the south of the country, fairly common in Wales and Ireland but records become scarce as you move north in Scotland where there is little to be found.

Bude marshes, Cornwall 19th July 2008

Added on 30th July 2008, updated 10th March 2010, updated 21st January 2013