Thallus closely attached centrally, often raised at margins and lobe ends, 3-7 cm diam. Lobes 3-7(-10) mm broad, ± flat, broad and rounded, contiguous to imbricate. Upper surface olive-green to olive-brown or dark brown, smooth to weakly wrinkled at margins, often strongly wrinkled-plicate centrally, matt or slightly shining at lobe apices, sometimes with a scattered, light pruina, pseudocyphellae laminal, numerous, small, white, isidia and soredia absent. Lower surface pale tan to dark brown, smooth to wrinkled, moderately rhizinate. Rhizines ± concolorous with lower surface, to 1 mm long. Apothecia common, sessile or subpedicellate, concave, to 6 mm diam., margins entire, pseudocyphellate. Ascospores ellipsoid to cylindrical 8-15 × 5-8 µm. Chemistry: Cortex K-, medulla K-, C-, KC-, Pd-. TLC nil.