Thallus to 3-6 cm diam., foliose, rounded or irregular, deeply lobate and richly branched, loosely appressed to partly ascending, very fragile, not swollen when wet. Lobes 1-2 mm wide, often remaining partly separate, often fan-shaped, ± contorted, nodular and irregular, convex, often sub-cylindrical, repeatedly branched, usually not ascending. Upper surface ± dark olive-green to brown-black, matt, without isidia, often minutely longitudinally striate, ± swollen and semi-transparent when moist. Anamorph: no information available. Teleomorph: ascomata apothecia, common, scattered, laminal. Disc 1-2 mm diam., flat to convex with ± thick, entire, crenulate or lobulate thalline exciple. Ascospores 26-43 × 4.5-6.5 μm, ellipsoid-fusiform, sometimes curved, 3-septate.