Thallus in neat rosettes to 5 cm diam., ± flattened. Upper surface olive-green or yellowish-olive brown to greyish-blue tinged brownish, matt, glossy in parts, rarely delicately white-pruinose in parts impartinga slightly frosted appearance to lobes, margins incised-lacerate or minutely crenate-lobulate. Lower surface white, densely arachnoid, veins pale to dark brown, broad, flat, anastomosing, 0.2-0.8 mm wide. Rhizines white to dark brown, densely fasciculate, short, to 2 mm long. Apothecia flat, horizontal, 2-3(-5) mm diam., distinctly raised above thalline margin, disc red-brown, margins pale buff, corrugate, exciple below corrugate-scabrid-tomentose. Ascospores uniformly 3-septate, colourless to pale brownish, 26-32(-38) × 5-8 µm. Chemistry: TLC nil, or occasionally a trace of an unidentified compound.