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

Caloplaca decipiens on wall in Dublin. January 2009