LichenIreland
  • Caloplaca decipiens (Arnold) Blomb. & Forssell
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Caloplaca decipiens
© Mike Simms
Caloplaca decipiens
© Mike Simms
Caloplaca decipiens
© Mike Simms
Caloplaca decipiens
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This rosette-forming species has a frosted, pale orange, outer fan of lobes and a darker central thallus with yellow-orange granular soredia attached to the lobe ends. It is normal for the centre of the thallus to disintegrate leaving the remainder to grow on. It can colonise mortar and tomb tops as well as nutrient-rich limestone. Discs are rare. North and south-east Ireland, rare in the west.

Key characteristics

  • Two-tone thallus with a pale-orange growing edge and darker centre with numerous small, granular soredia
  • Discs are rare; mainly in the east. C. saxicola is smaller with numerous discs.

Original text submitted by Vince J. Giavarini

 Simms, M. J., (2016). Caloplaca decipiens (Arnold) Blomb. & Forssell. [In] LichenIreland.
http://www.habitas.org.uk/lichenireland/species.asp?item=20530 Accessed on 2017-12-16.