Thallus initially several lobes developing from a central point on a short stipe, eventually becoming suborbicular to irregular, 1–3 (-5) cm diam., paper-like even when wet and extremely brittle when dry. Lobes adnate to slightly ascending, usually overlapping each other, slightly to distinctly revolute when mature, with rounded apices and entire to crenate, lacerate, or sinuose margins. Upper surface smooth when young, becoming scrobiculate to foveolate, greyish to dark chocolate brown, usually paler when dry, sometimes with a whitish pruina made of minute flattened granules. Cilia always present and often abundant on young lobes, persisting on parts of older thalli, simple to agglutinate, usually with pointed ends, hyaline, 200-500 µm long. Isidia always present, abundant, laminal, typically branched and coralloid, usually with a short stipe, forming coralloid masses 0.2–0.5 mm diam. Lower surface foveolate to scrobiculate, whitish to cream-colored, darker towards the centre, with sparse to dense tomentum. Cyphellae abundant, irregular to angular, usually cupulate, the surface membrane covered with papillae at least when young. Photobiont Nostoc. Anamorph: conidiomata pycnidia, sometimes present, immersed in the thallus lobes, not pigmented. Conidia numerous, 2-3 x 1-2 µm, bacilliform. Teleomorph: ascomata apothecia, rarely present, 200-1200 µm diam., submarginal, sessile, developed over a distinct invagination of the thallus. Disc reddish brown to dark brown, glossy, slightly concave especially when young, always with a crown of white to pale orange cilia 200-300 µm in length, formed of long agglutinated hyphae. Hymenium 70–90 μm thick with a pale orange to dark orange brown epihymenium, K-. Asci 8-spored. Ascospores 26–46 × 7–8.5 μm, fusiform, straight or slightly curved, with 1(−3) septa, not constricted at the septa, with a minute but distinct gelatinous appendage at the upper end.