Tylothallia verrucosa

Tylothallia verrucosa is a lichen in the family, Lecanoraceae. It was first described as Patellaria verrucosa in 1896 by Johannes Müller Argoviensis.

It is found on a wide range of non-calcareous rocks (including dolerite, granite, mudstone and sandstone), exposed to considerable sea-spray, from sea-level to up to 20 metres above the high tide mark.