Thallus roughened-granular, greyish-white, areolate-cracked, areolae minute, convex, subangular to subirregular, in patches 2-5(-10) cm diam.Apothecia sessile, crowded to scattered, round to irregular-deformed through mutual pressure, 0.2-2.5 mm diam., ± plane or undulate, disc brownish or brown-red, densely or finely grey-pruinose, margins persistent, entire, flexuose, or sinuous-undulate, concolorous with thallus, paler or ± pinkish. Epithecium granular, grey-brown or yellowish-brown 10-13 µm thick. Hymenium colourless 110-150 µm tall, pale yellowish. Asci clavate. Ascospores 2-3 seriate, broadly ellipsoid, apices rounded, straight, 13-15 × 6.8-9 µm. Chemistry: Atranorin, salazinic (K+ yellow → red) and norstictic (tr.) acids.