Description: This taxon is easily mistaken for Aspicilia calcarea (described elsewhere) owing to the thinness of the thallus and scattered discs. A close inspection shows that it has a darker grey colour, with evidence of scattered pruina and prominent discs in areoles that merge as if melted together. This subspecies is under-recorded in Ireland.

Key Identification Features:

• Thallus darker than Aspicilia calcarea often with some hint of pruina
• Areoles joined at the margin, but discs prominent, never flat or concave.

Original text submitted by Vince J. Giavarini

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

iNaturalist: Circinaria hoffmanniana at iNaturalist World Species Observations database.