Description: This rather Pannaria-like foliose lichen consists of a loose thallus of brown, part-frosted lobes sprinkled with an abundance of short isidia/soredia. The undersides of the lobes should be checked for their thick, dark velcro-like, bottle-brush-shaped rhizines. It is attracted to mossy, wayside and basic-barked trees. The species is thinly scattered in Ireland and is nowhere abundant.

Key Identification Features:

• The loosely attached thallus, brown lobes, scattered isidia and dark rhizines distinguish this species
• It could be mistaken for a member of the Pannariaceae which is why the underside of the lobes needs to be carefully examined.

Original text submitted by Vince J. Giavarini

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

iNaturalist: Physconia perisidiosa at iNaturalist World Species Observations database.