Description: An aquatic species with thick rounded floating leaves and flowers about one inch in diameter with three white petals, each with a yellow blotch. A local species found in three main areas: Lough Erne; the south-east of Lough Neagh and the southern end of the Ards Peninsula.

All names: Hydrocharis morsus-ranae L.

Distribution Map from NBN: Hydrocharis morsus-ranae at National Biodiversity Network mapping facility, data for UK.

iNaturalist: Hydrocharis morsus-ranae at iNaturalist World Species Observations database.