Thallus very thin, brownish-grey, often lacking, in indeterminate patches, 1-3 cm diam., abraded or lacking between verrucae, saxicolous. Fertile verrucae conical to ± hemispherical, round to irregular 0.2-1.0 mm diam., rather sparse, smooth, shining, fawn or brownish. Apothecia immersed, 1-4 per verruca, ostiole minute, pin-prick-like to ± disciform, to 0.1 mm diam., blackened, verrucae often surrounded by a thin, wavy, blackened prothallus. Asci 8-spored. Ascospores uniseriate to biseriate, oval-ellipsoid, 34-42.3 × 11.9-17 µm, wall 3-4 µm thick. Chemistry: K+ yellow → red, C-, KC+ red, Pd+ orange. Norstictic and connorstictic acids.