Lecanora albella  

Thallus ± continuous, sometimes becoming rimose in the centre, clearly delimited and forming small patches, pale to medium grey, the surface smooth to slightly granular. Sorediate morphs (not reported from GBI) have greenish, rounded, flat to convex, well-delimited soralia 0·5–2 mm diam. and a smooth and thin thallus.
Anamorph: no information available.
Teleomorph: ascomata apothecia, 0.5-1.5 mm diam., dispersed to closely aggregated, sessile, slightly constricted at the base. Thalline exciple well-developed, usually entire but sometimes slightly crenate, conspicuous at first but becoming excluded, the medulla with granular crystals dissolving in K. Discs pink to rose or occasionally pale brown, flat to convex, densely white-pruinose. Epithecium thick, yellow-brown, interspersed with coarse granules dissolving in K. Hymenium 60-85 μm tall. Interascal tissue of paraphyses 1.5-2.5 μm diam., sparsely branched and anastomosed, the apices not or only slightly swollen. Ascospores (9-) 10-12 (-15) × (5-) 6-8 (-9) μm, broadly ellipsoidal to broadly ovoid, hyaline, aseptate, thick-walled, smooth.
Chemistry: thallus C–, K+ yellow; exciple and discs Pd+ yellow to red, UV+ pale orange (atranorin, chloratranorin, protocetraric acid).