''Calicium chlorosporum'' is a

crustose Crustose is a habit of some types of algae and lichens in which the organism grows tightly appressed to a substrate, forming a biological layer. ''Crustose'' adheres very closely to the substrates at all points. ''Crustose'' is found on rocks and ...

lichen A lichen ( , ) is a composite organism that arises from algae or cyanobacteria living among filaments of multiple fungi species in a mutualistic relationship.tree In botany, a tree is a perennial plant with an elongated stem, or trunk, usually supporting branches and leaves. In some usages, the definition of a tree may be narrower, including only woody plants with secondary growth, plants that are ...

s throughout much of the world. The lichen has a pale brownish yellow to beige, verrucose, areolate or subimmersed

thallus Thallus (plural: thalli), from Latinized Greek (), meaning "a green shoot" or "twig", is the vegetative tissue of some organisms in diverse groups such as algae, fungi, some liverworts, lichens, and the Myxogastria. Many of these organisms wer ...

. 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.

References

chlorosporum Lichen species Lichens described in 1891 Lichens of Australia Lichens of Africa Lichens of North America Lichens of Central America Lichens of South America {{Caliciales-stub