Thallus crustose, 0.1-0.2 mm thick, in irregular patches 2-5(-8) cm diam., verrucose-roughened, greyish-white, yellowish-grey or yellowish, K+ purple, verrucae continuous or ± areolate-cracked, areolae rather angular 0.5-1.0 mm diam., margins rather indistinct, saxicolous. Apothecia crowded, rounded or distorted through mutual pressure 0.5-1.2 mm diam., disc concave at first becoming plane, matt, orange to red-brown, often minutely granular, margins pale yellow, thick at first obscuring disc, entire to crenulate, persistent. Paraphyses straight, not moniliform, slightly branched at apices. Ascospores uniseriate, oval-ellipsoid to oblong, apices rounded or slightly pointed, straight, 2-locular, 12-17 × 5-7 µm, septum c. ⅓ length of spore.