Species: Candelariella coralliza
Photos: Wall below pigeon nest. Courtmacsherry, Cork, SW Ireland.
Deep-cracked thick yellow thallus, areolate with rounded, evenly shaped granules. Apothecia are occasional, dirty yellowish with simple spores.
Chemical reactions: K- (Caloplaca species are K+ red)
Infrequent on well-lit acidic rocks used as bird-perching sites. Scattered distribution throughout Ireland.
Similar: Candelariella vitellina
Candelariella coralliza in crevice in wall. March 2009