Thallus glaucous grey-white or dingy creamish-white or pale olivaceous, matt, wrinkled-plicate or irregularly cracked, often obliterated by crowded verrucae, in patches 2-6 cm diam., in places whitish erose-subfarinose, corticolous. Fertile verrucae crowded, round to irregular 0.5-2.0 mm diam., ± hemispherical, white-farinose or concolorous with thallus. Apothecia 1-3 per verruca, innate, ostiole red-brown to black, punctiform to irregular 0.1-0.3(-0.7) mm wide, apex flattened, to ± papillate. Asci 8-spored, biseriate. Ascospores oval-ellipsoid, contents granular-oily to translucent, (43-)50-70(-78.3) × 26.1-39.1 µm, wall c. 8 µm thick, to 13.5 µm at apices. Chemistry: TLC nil.

Thallus whitish-arachnoid, ± decorticate, effuse or poorly developed, in patches 1-3 cm diam., delimited at margins by a thin, wavy, black line of prothallus, ± entirely composed of fertile verrucae, corticolous. Fertile verrucae rounded to irregular, 2-8 mm diam. Apothecia 5-20 per verruca, discs ± sinuous, 0.05-0.6 mm diam., pale to dark brown, shining, epruinose. Asci clavate, 8-spored. Ascospores biseriate, oval-ellipsoid to ± cylindrical, apices pointed or rounded, contents granular, 55-70 × 22.1-27.2 µm, wall 5.1 µm thick, thickest at apices. Chemistry: K+ yellow, C-, Pd+ orange. Stictic acid.