Forming the largest and highest uplands in southern Britain, the iconic landscapes of Dartmoor are founded on granite and mantled in peat. Deluged with nearly two metres of rain each year, the rocks and woodlands grow thick with an exceptional growth of lichens, mosses and liverworts.
https://www.plantlife.org.uk/uk/nature-reserves-important-plant-areas/important-plant-areas/dartmoor