• Caloplaca cirrochroa (Ach.) Th.Fr.
Caloplaca cirrochroa
Click on map to open large map in new window
(Map updated: 11 August 2009)

Click here to view an interactive map of the Northern Ireland dataset as currently collated by CEDaR.
The map is generated through the NBN Gateway using their Interactive Mapping Tool.


Most Caloplaca taxa are distinguished by a bright orange, crustose thallus. C. cirrochroa is no exception and on close study turns out to be one of the most beautiful examples of the family, forming circular thalli (1-2cm diam.) of narrow, radiating lobes to the rear of which are scattered, bright orange or lemon-yellow spots of convex soralia. The species is local, sometimes locally abundant, on hard, dry, sheltered, vertical limestone undisturbed headstones especially. Throughout Ireland.

Key characteristics

  • Orange circular thalli with an outer ring of radiating lobes surrounding an inner area spotted with bright orange or pale, lemon-yellow soredia
  • On hard limestones in warm, sheltered localities.

Original text submitted by Vince J. Giavarini

 Simms, M. J., (2016). Caloplaca cirrochroa (Ach.) Th.Fr.. [In] LichenIreland. Accessed on 2018-08-15.