• Caloplaca flavovirescens (Wulfen) Dalla Torre & Sarnth.
Caloplaca flavovirescens
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This orange fruited species is at once distinguished by its green-yellow thallus and extensively cracked, mosaic-like appearance. It occurs sparingly on limestone outcrops but can be more frequently seen growing on man-made substrates such as the top rails of concrete fencing. It is relatively frequent in suitable areas throughout Ireland.

Key characteristics

  • The large size of the thallus, jaundiced colour and its crazy-paving character help to indicate this species
  • While it is rarely abundant in its natural habitat, it thrives on artificial substrata.

Original text submitted by Simon Davey

 Simms, M. J., (2016). Caloplaca flavovirescens (Wulfen) Dalla Torre & Sarnth.. [In] LichenIreland. Accessed on 2018-08-17.