The habitats where swan necked thyme moss~(Mnium hornum) grows:

Alpine and subalpine calcareous grassland
Altantic hazel wood
Atlantic oak wood
Beech wood
Bracken scrub
Brownfield
Caledonian forest
Damp fertile disturbed
High montane heath and snow bed
Limestone pavement
Lowland calcareous grassland
Lowland dry acid grassland
Lowland dry oak and birch wood
Lowland mixed oak and ash wood
Maritime cliff
Montane scrub
Mountain ledge
Northern hay meadow
Raised bog
Rocky slope
Scree
Turlough and fluctuation mere
Upland acid grassland
Upland birch wood
Upland calcareous grassland
Upland dry heath
Upland mixed ash wood
Upland spring flush
Valley mire
Wet woodland
Wood pasture
Yew wood