Thallus of scattered to confluent, ± globose, whitish, grey-green or bluish grey, glossy or matt areoles 80-300 µm diam., sometimes ± immersed; photobiont cells 4-7 μm diam. Anamorph: conidiomata pycnidia, ± immersed; walls green (K–) in upper parts: (a) ca 100 µm diam., with macroconidia 16-22 × ca 1 μm, curved, 3- to 7-septate; (b) ca 100 µm diam., with mesoconidia 4-7 × 1.5-2 μm, ± cylindrical to obovoid; (c) 40-50 µm diam., with microconidia 5-7 × ca 0.8 μm, narrowly cylindrical; only (c) is common. Teleomorph: ascomata apothecia, 150-600 (-900) µm diam., black or blue-black, immarginate, convex to ± globose, rarely with a stalk to 1 mm tall. True exciple ± distinct in young apothecia but soon reflexed, brownish in outer parts. Hymenium 50-75 μm tall, hyaline or the upper and sometimes lower part olivaceous to blue-green, K–, rarely with a few scattered, minute violaceous (K+ green) granules. Hypothecium pale blue-green or olivaceous, K–, the central part often ± hyaline or pale brownish. Interascal tissue of paraphyses 1.5-2 μm diam., numerous, simple or sparingly branched above; apices often ± swollen and coated in green or greenish brown pigment. Asci 45-50 × 11-19 μm, clavate, 8-spored. Ascospores 16-36 (-38) × 4-6 (-7) μm, fusiform to cylindric-fusiform, straight or slightly curved, the apex rounded and the base acute, (3-) 4- to 7-septate, hyaline, fairly thin-walled, smooth, without an epispore, gelatinous sheath or appendages. Chemistry: thallus C–, K–, KC-, Pd+ red (argopsin); apothecial sections C–.