LichenIreland
  • Pyrrhospora quernea (Dicks.) Körb.
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Pyrrhospora quernea
© Mike Simms
Pyrrhospora quernea
© Mike Simms
Pyrrhospora quernea
© Mike Simms
Pyrrhospora quernea
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This is one of several lichens that appear as confusing patches of yellow-brown colour on trees especially in sunny, nutrient-rich situations by waysides, along field margins or on trees on estates, golf courses or in former parklands. P. quernea has a very fine sugar-granular texture surrounded by a black border or prothallus. Coupled with its ochre-yellow appearance, this makes it distinctive among the crustose lichens. It is never powdery like its closest lookalikes Lecanora expallens or Ochrolechia inversa. Tiny rounded, red-brown discs are sometimes present and should be looked for.

Key characteristics

  • Ochre-yellow, slightly cracked thallus of fine sugary granules (check through a hand lens)
  • Often surrounded by a black margin; discs convex, tiny, red-brown.

Original text submitted by Vince J. Giavarini

 Simms, M. J., (2016). Pyrrhospora quernea (Dicks.) Körb.. [In] LichenIreland.
http://www.habitas.org.uk/lichenireland/species.asp?item=18982 Accessed on 2017-12-15.