Candelariaceae Candelariella aurella Growth type crustose Chemical results: K- Most frequent on man-made substrates in urban areas; concrete, cement and mortar. The thin and sometimes inconspicuous granular thallus is yellow to greenish-yellow with a thin, continuous dark-grey to blackish prothallus. Yellow apothecia are frequent, dispersed or crowded. Asci 8-spored. Similar: Candelariella vitellina. Asci 12-32 spored

Candelariella aurella
Sturminster Marshall, Dorset. March 2014