The habitats where harts tongue thyme moss~(Plagiomnium undulatum) grows:

Altantic hazel wood
Atlantic oak wood
Beech wood
Brownfield
Caledonian forest
Coastal floodplain grazing marsh
Damp fertile disturbed
Hedgerow scrub
Limestone pavement
Lowland calcareous grassland
Lowland dry oak and birch wood
Lowland fen
Lowland mixed oak and ash wood
Machair sand dune
Mixed scrub
Moist damp verges and banks
Montane scrub
Mountain ledge
Purple moor grass and rush pasture
Sand dune
Upland birch wood
Upland calcareous grassland
Upland mixed ash wood
Upland spring flush
Wet woodland
Wood pasture