The habitats where floating bur reed~(Sparganium angustifolium) grows:

Fast flowing river and stream
Lowland fen
Marginal and inundation
Nutrient rich eutrophic lake
Peat stained (dystrophic) water
Pond ditch and canal
Sluggish river and stream
Upland lake loch and tarn
Upland spring flush
Valley mire