The habitats where common water starwort~(Callitriche stagnalis) grows:

Chalk river and stream
Coastal floodplain grazing marsh
Fast flowing river and stream
Lowland fen
Marginal and inundation
Nutrient rich eutrophic lake
Peat stained (dystrophic) water
Pond ditch and canal
Reedbed
Sluggish river and stream
Turlough and fluctuation mere
Upland spring flush
Wet woodland