Photo Credit: Emma Matthars - Chelmer Navigation
Leaves are green, shiny, kidney-shaped with a crinkled edge, frequently broader than long and up to 7cm. Leaves can be floating or emergent.
Flowers appear between July and August but it rarely flowers in the UK.
Winter foliage varies little but mats of vegetation may reduce in size and be found nearer the water's edge.
Similar species is Marsh Pennywort (Hydrocotyle vulgaris). This native species has smaller leaves (1.5cm diameter) which are round and complete.
Visit the Non-Native Species Secretariat website for more information on identifying Floating Pennywort.
You should record the presence of Floating Pennywort on a national database. This is easily done via the PlantTracker app, a recording system created in partnership with the University of Bristol, Environment Agency and the Centre for Hydrology & Ecology. Alternatively you can record online at the Non-native Species Secretariat website. You should also alert the appropriate land owner, council and or management body to the presence and location of this plant.