Species: Caloplaca ochraceaGrowth 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 Ám.
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