Irish lichens

Lecanora gangaleoides
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


Lecanora gangaleoides


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

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