Description: A native aquatic perennial with a totally submerged rosette of long narrow cylindric leaves which are characteristically bent backwards just below their rounded tips. From the rosette arises the long flowering shoot which carries a loose one-sided spike of pale blue flowers well above the water level.

Formerly growing in Lough Neagh, the plant is now extinct there, but it still grows in several upland lakes around Northern Ireland.

All names: Lobelia dortmanna L.

Distribution Map from NBN: Lobelia dortmanna at National Biodiversity Network mapping facility, data for UK.

iNaturalist: Lobelia dortmanna at iNaturalist World Species Observations database.