Order: Teloschistales       Family: Teloschistaceae Species: Caloplaca ochracea (Xanthocarpia ochracea) Growth type crustose Photos: On limestone. Black Head, the Burren, W Ireland. BLS Burren meeting 2009 Mosaic-forming with scurfy or continuous, patchy pale-yellow to yellow-grey thallus. Apothecia never convex, dark orange-yellow, flat with thick, slightly paler margins. Spores thick-walled, 4-celled, 12-15 x 5-7 µm. K+ crimson / purple. Occurs among other lichens on limestone. Scarce, main distribution in Ireland is in the Burren, Co. Clare and in Co. Antrim. Similar: C. dalmatica. Finely areolate thallus, spores 2-celled.

Caloplaca ochracea. BLS Burren meeting, April 2009