Order: Lecanorales Family: Candelariaceae
Species: Candelariella aurella
Photos: On concrete wall. Macroom, Co. Cork, SW Ireland.
Thin, scattered yellow to greenish-yellow granular thallus, sometimes inconspicuous. Thin dark-grey to blackish continuous prothallus. Frequent dispersed or crowded yellow apothecia with simple spores.
Chemical reactions: K- (Caloplaca species are K+ red)
Occurs on urban walls throughout Ireland on man-made substrates; concrete, cement and mortar.
Similar: Candelariella vitellina.
Candelariella aurella July 2009