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. Distribution is mainly coastal, on acidic rocks. K+ yellow, P+ orange, UV-. Apothecia greenish-brown in section. Similar: Tephromela atra. Less warted thallus, thecium purplish.

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