Thallus determinate, effigurate, lobate, at least at margins, orbicular to spreading, to 8 cm diam., prothallus absent. Lobes at periphery contiguous, 2-13 mm long and 0.7-1.0 mm broad, separated by narrow cracks, adhering closely or loosely to substrate, variously divided, swollen, flattened at apices. Upper surface smooth or in places ± transversely corrugate, centrally areolate-tesselate-papillate, areolae to 2 mm diam., separated by large, gaping cracks, surface warted, congested, warts to 0.7 mm diam., often with pycnidia, whitish or creamish, matt, epruinose, without isidia or soredia. Cephalodia numerous, sessile, on or between warts, rounded, flattened, radially plicate-effigurate, to 1.5 mm wide, pinkish or red-brown, matt. Apothecia scattered, subpedicellate, to 1.5 mm diam., rotund, thalline margin persistent, entire or wrinkled, disc concave to plane, red-brown, matt, with a pale brownish pruina. Hymenium 200-240 µm tall. Hypothecium to 120 µm thick. Ascospores ellipsoid, 20-23 × 10-13 µm. Chemistry: Cortex K- or + pale yellow, C-; medulla K-, C+ red, Pd-.