Thallus whitish, pale grey to grey-brown, areolate, sorediate. Areoles 0.2-2.5 mm diam., discrete and scattered to locally contiguous, rounded to irregular, flat to slightly convex, ± cracked. Soralia 200-400 µm diam., usually concolorous with the thallus, sometimes greenish white, rounded, erose or delimited by a thin, elevated thallus margin, or effuse. Prothallus black, well-developed, between areoles and bordering the thallus. Photobiont chlorococcoid. Anamorph: no information available. Teleomorph: ascomata apothecia, 0.3-1.7 mm diam., rare, sessile, at times flexuose. Disc dull black-brown, flat to convex, at times with an umbo. True exciple black or concolorous with the thallus, thin, distinct, persistent. Ascospores 7.5-11 × 5-7 μm, broadly ellipsoidal, aseptate. Chemistry: medulla and soralia UV+ bluish white (divaricatic acid).