The habitats where floating sweet grass~(Glyceria fluitans) grows:

Brownfield
Chalk river and stream
Coastal floodplain grazing marsh
Fast flowing river and stream
Hard cliff and cliff slope
Lowland fen
Marginal and inundation
Mesotrophic grassland
Nutrient rich eutrophic lake
Peat stained (dystrophic) water
Pond ditch and canal
Purple moor grass and rush pasture
Reedbed
Sluggish river and stream
Turlough and fluctuation mere
Upland rush pasture
Upland spring flush
Valley mire
Wet woodland