The habitats where bitter vetchling~(Lathyrus montanus) grows:

Altantic hazel wood
Atlantic oak wood
Brownfield
Caledonian forest
Limestone pavement
Lowland dry acid grassland
Montane dwarf shrub heath
Mountain ledge
Northern hay meadow
Upland acid grassland
Upland birch wood
Upland calcareous grassland
Upland dry heath
Wood pasture