Sarcographa

About

Sarcographa is a genus of lichen-forming fungi in the family Graphidaceae. Established in 1825 by the French botanist Antoine Laurent Apollinaire Fée, the genus contains 22 species that are recognised by their distinctive star-shaped colonies of radiating, script-like fruiting structures with black borders. These bark-dwelling lichens are found in humid tropical and warm temperate forests worldwide and serve as indicators of undisturbed woodland, as they quickly decline when forest canopy is opened or disturbed.

Summary from Wikipedia