Thallus ± completely covered by isidia, where exposed flat to slightly scurfy-granular, concolorous with isidia or slightly paler. Isidia 50–90(–110) μm diam, light beige to orange, sometimes dark orange or brown, occasionally grey or green, normally branched and forming a delicate coral-like structure, often layered and forming a cracked-areolate crust. Anamorph: conidiomata pycnidia, rare but abundant when they occur, immersed, ostiole red and slightly raised. Conidia 3.0–5.0 × 0.8–2.0 μm, bacilliform to narrowly ellipsoidal. Teleomorph: ascomata apothecia, adnate to sessile, round to very irregular or lobate (the irregularity increasing with age), younger apothecia orange to light red, darkening to a more ferruginous red with age Disc strongly concave to convex, older apothecia sometimes increasingly convex, the margin slightly raised or level with the disc, 60–85 μm thick, consisting of ± radiating, elongate cells 4–10 (–15) × 2.5–4 μm in size, algae sometimes occurring at the base. Epihymenium orange, granular. Hymenium (80–)85– 100(–105) μm in height, hyaline. Hypothecium (50–) 60–100(–110) μm in height, frequently brown-pigmented, often with oil droplets. Interascal tissue of paraphyses, simple or branched above, 1– 2.5 μm diam, the upper cells sometimes slightly widened. Asci 50–70 × 10–16 μm, clavate, 8-spored. Ascospores (10–) 11.5–14 (–15) × (4–) 6–8 (–9) μm, polarilocular, with a ± median septum (3–) 3.5–4 (–5) μm thick. Chemistry: Thallus K+ purple red and C+ light red, (K− and C− on specimens without orange colour).