Calicium viride

About

Calicium viride, commonly known as the green stubble lichen, is a species of pin lichen in the family Caliciaceae, and the type species of the genus Calicium. It is a common and widely distributed species in temperate areas of the Northern Hemisphere and southern South America. The thallus of the lichen consists of a basal crust, and apothecia on a stalk. Diagnostic characteristics of Calicium viride are its brown excipulum, and its green, granular crust.

Summary from Wikipedia