• Physconia perisidiosa (Erichsen) Moberg
Physconia perisidiosa
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(Map updated: 11 August 2009)

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 characteristics

  • 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

 Simms, M. J., (2016). Physconia perisidiosa (Erichsen) Moberg. [In] LichenIreland. Accessed on 2019-01-16.