Thallus lobate, orbicular, closely attached, 4-10 cm diam., corticolous and saxicolous. Lobes rather short, narrow 1-4 mm wide, subdichotomously branched, subimbricate, margins entire, axils sinuous, lobe apices often ± ascending. Upper surface smooth, shining, minutely maculate (×10 lens), pale greyish-green, sorediate. Soralia coarse to pustular, forming abraded patches towards lobe ends. Lower surface black, densely rhizinate. Rhizines black, dichotomously branched. Apothecia not seen. Chemistry: Cortex K+; medulla K-, C+ red, Pd-. Gyrophoric acid and atranorin.