Syncesia

Syncesia is a genus of lichen-forming fungi in the family Roccellaceae. These lichens typically grow as thin crusts on tree bark in humid environments, forming small raised patches that contain multiple tiny disc-shaped fruiting bodies. The genus includes about nine species found primarily in tropical and subtropical regions around the world, from the Caribbean and South America to Africa and Asia. Many species produce powdery patches on their surface that help them spread to new locations without sexual reproduction....read more on Wikipedia.