Description: Like L. crassissima this is a species of dry underhangs sheltered from direct rain but the thallus is powdery, blue-grey to greenish and is most commonly noticed overgrowing moss cushions. The thallus tests only faintly C+ yellow or pink but is strongly Pd+ yellow to orange. Usually on calcareous siliceous rocks spreading to mosses. There are three chemotypes, only reliable separated in the laboratory.

Key Identification Features:

• Thallus blue-grey to greenish, powdery; C+ faint yellow or pink, Pd+ yellow to orange
• Underhangs associated with calcareous siliceous rock.

Original text submitted by Vince J. Giavarini

Distribution Map from NBN: Lepraria eburnea at National Biodiversity Network mapping facility, data for UK.

iNaturalist: Lepraria eburnea at iNaturalist World Species Observations database.