Order: Teloschistales       Family: Teloschistaceae Species: Caloplaca flavovirescens Growth type crustose. Photos: On path and urban wall. Co. Cork, SW Ireland. Specimen immediately below identified by John Douglass Large greenish-yellow to orange angular-areolate thallus surrounded by pale prothallus. Frequent brownish-orange apothecia with paler margins. Often occurs as isolated specimens. Saxicolous, usually on man-made substrates and calcareous rocks. Also frequent on sea-shores and on acidic rocks affected by more basic downwash. K+ crimson / purple.

Caloplaca flavovirescens. July and August 2009