Thallus 1-4 (-6) cm diam., rather compact, sometimes coalescing and forming extensive patches. Lobes 2-5 mm wide, appressed, separate but ± overlapping towards the centre, rounded, often ± indented, axils rounded but not markedly sinuose, recurved at the tips. Upper surface grey or grey-green, smooth, ± matt; marginal cilia very sparse, usually absent. Soralia laminal, irregularly spreading, ± diffuse, erose, mainly on or near the lobe ends, concolorous or slightly darker than the thallus. Lower surface black, ± rhizinate to margins, rhizines simple, forked or ± dichotomously branched. Anamorph: no information available. Teleomorph: ascomata apothecia, rare; disc to 6 mm diam. Thalline margin ± sorediate, often recurved. Ascospores 11-16 × 8-10 μm, broadly ellipsoidal to almost spherical. Chemistry: cortex K+ yellow; medulla C+ pink-red, K–, KC+ red, Pd–, UV- (atranorin, gyrophoric acid [major], lecanoric acid [minor] and related accessory substances [including those in the hiascic acid group]).