Species: Caloplaca flavescens
Photos: On church wall. Macroom, Cork, SW Ireland.
Rosettes of long narrow yellow-orange lobes, whitish at the centre which often disintegrates and falls out with age. Numerous orange apothecia with paler margins. Soredia and isidia are absent.
K+ crimson / purple.
Very common throughout Ireland on walls, church memorials and headstones and also on hard calcareous rocks.
Similar: Caloplaca aurantia
Caloplaca flavescens. Macroom, County Cork.