Thallus crustose, spreading, 0.08-0.2 mm thick, of crowded, unequal, small granules and isidia, corticolous, rarely saxicolous. Upper surface whitish-grey or creamish-brown, without a definite margin, generally with cephalodia and isidia. Cephalodia plane to subglobose, dark pinkish-cream. Isidia cylindrical, to 0.8 mm tall and 0.1 mm thick, corticate, simple or branched, Apothecia immersed singly in small subglobose warts, to 1 mm diam., thalline margin isidiate, apically perforate, ringed with a pale pinkish-cream proper margin. Ascospores 8 per ascus, colourless, simple, ellipsoid, 40-70 × 20-30 µm with a wall 2.5-4 µm thick. Chemistry: K + yellow → red, C-, KC+ red, Pd+ orange. Stictic, norstictic and salazinic acids.