Order: Lecanorales       Family: Lecanoraceae Species: Lecanora gangaleoides Growth type crustose. Photos: On acid coastal rock. Dunmanus Bay, Cork, SW Ireland. Greenish-grey, warted or smooth thallus with white prothallus. Apothecia with wide thalline margin, black convex discs. Thecium dark greenish. Scratching the discs or thallus reveals orange anthraquinones. K+ yellow, P+ orange, UV- or pale orange. The apothecia are greenish-brown in section. Distribution is mainly coastal, on acidic rocks. Similar: Tephromela atra. Less warted thallus, thecium purplish. UV+ bluish

Immediately above: Lecanora gangaleoides on harbour wall, Bantry, Co. Cork