An aquatic which grows submerged in still or slowly flowing, eutrophic water in lakes, ponds, rivers, canals and ditches. It may be so abundant in ponds and ditches that it forms dense masses which rise above the water surface. Reproduction is mostly by vegetative fragmentation, but seeds are produced in still-water habitats in some years. Lowland.
This species appears to be more frequent than shown in the 1962 Atlas. This probably reflects better recording of aquatic plants, but there is little doubt that because this species grows in eutrophic water its distribution is at least stable, if not increasing.
Circumpolar Southern-temperate element.