Calicium chlorosporum

Calicium chlorosporum is a crustose lichen that is found growing on trees throughout much of the world.
The lichen has a pale brownish yellow to beige, verrucose, areolate or subimmersed thallus. The apothecia is high with a shining black to brownish stalk that is typically diameter.
The species is found in Africa, North, Central and South America, and in Australasia.