Thallus pale olive-green or, greenish-grey to fawnish-green or yellowish-green, wrinkled-plicate to verrucose or papillate to areolate-cracked, matt, ± waxy, smooth in parts, in irregular patches, 2-5 cm diam., delimited at margins by a thin, wavy black line of prothallus, margins slightly plicate-radiate, corticolous. Fertile verrucae concolorous with thallus, raised, irregular, locally fused in deformed groups, 2-4(-8) mm diam. Apothecia immersed, 2-4(-8-10) per verruca, ostioles minute, punctiform, black or brown, surface of verrucae slightly puckered at ostiole, margins rounded, irregular, not splitting. Asci 2-spored. Ascospores broadly ellipsoid or oblong-ellipsoid or oval, both ends round or one end pointed (120-)160-220 × 43-70 µm, wall 13-17 µm thick, radial zonation of inner wall conspicuous. Chemistry: TLC 2 unidentified compounds, one a xanthone charring UV+ citrine yellow, and ?perlatolic acid.