Order: Lecanorales Family: Lecanoraceae
Species: Lecanora albescens
Photos: On concrete post. Ballingeary, Co. Cork, SW Ireland.
Small patches of convex, white or occasionally very pale grey areoles, sometimes notched or almost placodioid at margins. Abundant crowded, greenish or pink-brown, +/- white pruinose apothecia. Disc margins are persistent, even, crenulate or wavy.
Common and widespread on well-lit mortar, concrete, paving stones, memorials and hard calcareous rocks.
Chemical reactions negative.
Lecanora albescens October 2009