Thallus foliose, lobate, spreading to ± subascendent, loosely attached to 4 cm diam. Lobes 5-10 mm long and 3-6 mm wide, margins entire, sinuous to ± notched or incised. Upper surface smooth, matt, green to yellowish- or greyish-green, isidia, maculae, pseudocyphellae and soredia absent. Medulla white, to 150 µm thick, of ± loosely woven, anastomosing hyphae, cells 2.5 µm diam. Lower surface pale whitish, smooth to somewhat longitudinally ridged and wrinkled, rhizines absent. Apothecia marginal on small lobules c. 1 mm long, 1-15 per frond, mostly slightly displaced to ventral surface, hemispherical, 0.5 mm diam., disc convex, black or brown with a thin pale thalline margin at base. Hypothecium dark brown, 200-250 µm thick. Paraphyses very thin, entangled, simple. Ascospores globose irregularly ellipsoid, brown, 4-6.0 µm, thin-walled forming a well-developed mazaedium.