The habitats where marsh pennywort~(Hydrocotyle vulgaris) grows:

Blanket bog
Coastal floodplain grazing marsh
Dune slack
Limestone pavement
Lowland fen
Maritime cliff
Nutrient rich eutrophic lake
Pond ditch and canal
Purple moor grass and rush pasture
Raised bog
Reedbed
Saline lagoon
Salt marsh
Sand dune
Turlough and fluctuation mere
Upland acid grassland
Upland birch wood
Upland rush pasture
Upland spring flush
Valley mire
Wet woodland