Order: Lecanorales       Family: Lecanoraceae Species: Myriolecis hagenii (Lecanora hagenii) Growth type crustose Photos: On weathered estuary post. Ardsallagh, Co. Waterford, Ireland. Identified by John Douglass Thallus usually smooth and grey, sometimes immersed. Apothecia become constricted at base, discs usually reddish-brown, +/- pruinose with thin grey margins. Often in small groups becoming angular by compression. Spores 7-14 x 4-8 µm. Micrograph below. Chemical reactions negative Nitrophytic, most frequent on dusty or nutrient-rich bark and wood, occasional on bricks and pavements Similar: Lecanora dispersa is usually saxicolous

Microscope photograph

Lecanora hagenii. April 2012