Thallus orbicular to spreading, often free at margins, 5-10(-12) cm diam. Lobes laciniate-elongate, imbricate, margins wavy, crisped, minutely notched or incised, ± isidiate. Upper surface bright lettuce-green, tinged brownish at apices when wet, pale greenish-grey when dry, undulate, smooth, matt, minutely white-pubescent towards lobe apices, often faintly scabrid in patches. Medulla yellow. Photobiont green. Lower surface whitish to pale yellowish, suffused pinkish in parts, very finely tomentose to margins, tomentum sparse, short, white, soft. Pseudocyphellae scattered, yellow, effigurate to rounded, to 1.5 mm wide, flat. Apothecia 2-8mm diam., marginal or submarginal, distinctly pedicellate, disc dark red-brown, deeply concave, margins coarsely golden-sorediate, ± enclosed by verrucose-areolate, white tomentose, concolorous thalline exciple. Ascopores brown, fusiform, 1-3-septate, 18-21 × 6-7 µm. Chemistry: Pulvinic acid, pulvinic lactone, calycin, and unidentified triterpenes or sterols.