Thallus placodioid, forming large, even, circular patches, 10 cm or more in diam. Lobes closely appressed, rounded or irregular, the surface matt, pale to deep orange; lobe-ends not widened, rounded, convex, sometimes faintly pruinose; lobes contiguous, pleated, sometimes overlapping, the centre coarsely areolate, uneven, of sometimes contorted and congested lobes, often white and non-pigmented in old thalli, dotted with orange apothecia. Isidia, soredia and blastidia absent. Photobiont trebouxioid. Anamorph: not known. Teleomorph: ascomata apothecia, to 1.5 mm diam., mainly confined to the centre of the thallus, usually abundant and crowded, flat at first, becoming convex when old. Thalline margin concolorous, with the disc later becoming excluded; disc orange-yellow to orange-brown. Epithecium with numerous yellow-brown crystals. Hymenium and hypothecium hyaline. Interascal tissue of paraphyses, slender and straight to flexuose, not notably swollen at the apices. Asci clavate, 8-spored. Ascospores 12-15 × 8-10 μm, swollen at the septum, lemon-shaped, the septum variable in breadth, to 5 μm wide. Chemistry: all parts K+ purple.