The habitats where Lyon's notchwort~(Tritomaria quinquedentata) grows:

Alpine and subalpine calcareous grassland
Altantic hazel wood
Atlantic oak wood
Brownfield
Caledonian forest
High montane heath and snow bed
Limestone pavement
Lowland calcareous grassland
Montane dwarf shrub heath
Mountain ledge
Rocky slope
Scree
Upland birch wood
Upland calcareous grassland
Upland spring flush
Wood pasture