''Calicium laevigatum'' 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 a ...

lichen that is found growing on

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 in the South West region of Western Australia.

References

laevigatum Lichen species Lichens described in 2006 Lichens of Australia Taxa named by Leif Tibell {{Caliciales-stub