Thallus grey-white or pale glaucous, wrinkled-plicate to verrucose, marigns shallowly nodular-papillate to irregularly wrinkled, with a thin, black prothallus. Fertile verrucae common, crowded, rounded to irregular, 1-2.5 mm diam., ± hemispherical, apices flattened, surface puckered or irregularly plicate-rugose. Apothecia immersed, 1-3 per verruca, ostioles black, depressed 0.01-0.1 mm wide, disc blackish with a white pruina. Asci 8-spored. Ascospores biseriate, oval-ellipsoid with rounded, flattened or slightly pointed ends, contents granular at first then hyaline, 90-113 × 30.4-39.2 µm, wall 4-7(-17) µm thick. Chemistry: Unidentified compound (?xanthone) charring UV+ citrine yellow.