Thallus minutely verrucose-papillate, olive-greenish, matt, areolate-cracked, areolae 1-2 mm wide, angular, plane, separated by narrow or wide cracks, in patches to 4 cm diam., with a ± conspicuous whitish marginal prothallus, 1.5-2.0 mm wide. Apothecia sessile, round to irregular, solitary to 2-4-confluent and then distorted through mutual pressure, 0.1-0.8 mm diam., plane or subconcave at first, marginate, margins thin, entire, concolorous with disc or paler, disc convex and immarginate at maturity, pale orange-brown to red-brown, shining. Hymenium pale straw-coloured or colourless 65-90 µm tall. Hypothecium pale yellowish, c. 45 µm thick. Ascospores fusiform, contents oily, septa indistinct, 3- (rarely 5-) septate, 17-25.5(-30) × 3.4-5.1 µm.