Caloplaca magnussoniana

About

Caloplaca magnussoniana is a species of crustose lichen in the family Teloschistaceae. This small orange-brown lichen forms crusty patches on both volcanic rocks like dolerite and basalt, as well as limestone surfaces in sheltered but well-lit locations. It is found in temperate southeastern Australia, particularly in Victoria and Tasmania, from sea level up to about 600 metres elevation. The species is named after the Swedish lichenologist Adolf Hugo Magnusson and can be distinguished from similar species by its tightly clustered fruiting bodies and unique microscopic features including oil-filled cells in its reproductive structures.

Summary from Wikipedia