Description: 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 Identification Features:

• 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

Distribution Map from NBN: Gyalolechia flavovirescens at National Biodiversity Network mapping facility, data for UK.

iNaturalist: Gyalolechia flavovirescens at iNaturalist World Species Observations database.