Thallus ± orbicular, attached centrally, margins ± free, 5-12(-30) cm diam. Lobes large, rounded, 1.5-5.0 cm wide, margins minutely indented-incised, not sorediate or isidiate. Upper surface bright lettuce-green or glaucous-green or pale yellowish-green when wet, pale greyish-green when dry, cinnamon-brown or suffused purplish on storage, matt to rather waxy, glossy and often tinged brown marginally, uneven, ± deeply faveolate-reticulate, especially towards margins. Medulla yellow. Photobiont green. Lower surface complexly wrinkledverrucose, not or sparingly tomentose, pale yellowish or buff, blackish centrally. Pseudocyphellae yellow to reddish-yellow, to 0.6 mm diam., round to irregular, crowded, papillate, ± bursting at apices.Apothecia small 1-2 mm diam., abundant, contiguous or scattered, often crowded, disc matt, red-brown to blackish, convex to plane, concave when young, margins thin, crenate or denticulate-coronate, irregular, not isidiate, thalline exciple smooth, glossy. Ascospores fusiform, 1-3-septate, colourless, 25-36 × 7-11 µm. Chemistry: Pulvinic dilactone, pulvinic acid, calycin, polyporic acid, and unidentified pigment (red in acetone) 2α,3β,22α-triacetoxystictane, 22α,hydroxystictane-3-one (±), 2α3β-diacetoxystictane-22α-ol, stictane-3β,22α-diol (±), 2αacetoxystictane-3β,22αdiol, 3β-acetoxystictane-2α,22α-diol (±) and stictane-2α,3β,22α-triol (±).