Thallus crustose, 0.1 mm thick, scarcely visible at margins of apothecia, wrinkled, pale brownish, areolate-cracked, areolae plane, angular, separated by narrow cracks, K+ purple, saxicolous. Apothecia copiously developed and often obscuring thallus, 2-5 confluent, contorted through mutual pressure, disc red, 0.4-1.2 mm diam., matt, epruinose, plane at first, becoming convex, contorted, margins thin, entire, prominent, concolorous with thallus. Ascospores biseriate, ellipsoid or subcylindrical-ellipsoid, apices rounded, straight, 2-locular, 12-14 × 4-5.5 µm, septum c. ¼ to ⅓ length of spore.