This is a tiny submerged or lakeside aquatic plant, local in occurrence although where found it can be abundant in quantity. Its main area in Northern Ireland is south-east County Down, County Armagh and the Lough Neagh shores.
All names: Elatine hydropiper L.
NBN Atlas mapping: Species account : NBN Atlas UK Species Observations database
iNaturalist: Species account : iNaturalist World Species Observations database