Thallus flat to involute, lobate, spreading, greyish-blue to brownish, 2-5 cm diam., corticolous. Lobes orbicular to elongate ± elevated, overlapping, congested, 3-5 mm wide, margins entire to irregularly incised, isidiate. Isidia numerous, laminal, dense in places, polymorphic, cylindrical to lobulate, often flattened and minutely squamulose, simple or branched. Upper surface smooth, not or occasionally ± wrinkled-plicate. Lower surface densely white-tomentose, margins ± glabrous, hairs about 20 µm long. Apothecia rare, sessile, laminal, 3-4 mm diam., disc slightly convex, pale brown to dark red-brown, thalline exciple concolorous with thallus, with numerous isidioid outgrowths. Ascospores ellipsoid with pointed apices, submuriform, 28-35 × 12-17 µm.