Order: Teloschistales       Family: Teloschistaceae Species: Caloplaca decipiens Growth type placodioid. Photos: On city centre wall. Dublin, Ireland. Identification confirmed by Alan Silverside (from photographs) Small light-yellow to brownish-orange thallus, centre darker, often disintegrates. Long convex, +/- distinct lobes with palmate tips, inner lobes with granular orange-yellow soredia. Occurs on mortar, tombstones and nutrient-rich limestone. K+ crimson / purple.

Caloplaca decipiens on wall in Dublin. January 2009