Thallus usually small, sometimes forming colonies to 5 cm diam. or more, foliose, rather thin, deeply lobed, often forming rosettes, slightly swollen when moist. Lobes 0.5-6 mm wide, often rather few, almost ear-like, ear-like, ± rounded at the apices, concave, frequently overlapping, often with ± ascending, wavy and sometimes convoluted margins. Margins entire or crenate, occasionally somewhat lacerate, but never swollen. Upper surface olive-green-brown to black, smooth or isidiate. Lower surface often with white rhizines, sometimes forming ± scattered hapters. Isidia at first globular, soon flattened and squamule-like. Anamorph: information not available. Teleomorph: ascomata apothecia, infrequent, appressed. Disc 1-2(-2.5) mm diam., flat. Thalline exciple often bearing lobules. Ascospores 26-34 × 13-15 μm, subellipsoidal or ± ovoid with rounded ends, 3-septate or submuriform, rarely 4- or 5-septate.