Thallus endophloeodal, crustose, spreading, in patches, 2-6(-10) cm diam., pale yellow or fawnish-yellow or tawny-olive, shining, glossy, smooth, continuous or ± areolate-cracked with minute, white flecks (?pseudocyphellae) in upper surface (×10 lens). Perithecia in emergent, black, carbonised, shining verrucae, monocarpic, becoming polycarpic, 0.4-1.8 mm diam., round to irregular, swollen, apical ostiole black, depressed, 0.1-0.3 mm diam. Asci 225 × 40 µm, clavate. Ascospores 8 per ascus, muriform, pale brownish or hyaline, oblong with slightly pointed ends 50-60 × 18-21 µm, surrounded by a colourless outer membrane 2-3 µm thick.