One of the commonest of the pondweeds. It grows in still freshwater, rooted in the bottom mud. Submerged leaves are grass-like, but higher up the shoot it produces oval floating leaves about four inches long.
All names: Potamogeton natans L.; Potamogeton hibernicus (Hagstr.) Druce
NBN Atlas mapping: Species account : NBN Atlas UK Species Observations database
iNaturalist: Species account : iNaturalist World Species Observations database