Thallus foliose, lobate, distinctly dorsiventral, closely to loosely attached, rarely subascending, corticolous, terricolous or saxicolous. Lobes subli-near to subirregular, rarely broad and rounded, margins entire to variously notched or incised, smooth, without cilia. Upper surface with pseudocyphellae, often maculate, upper cortex paraplectenchymatous without a pored epicortex. Photobiont green, . Lower surface black or brown, uniformly rhizinate to margins. Rhizines simple or squarrosely branched, black. Apothecia pedicellate to sessile, disc often perforate, thalline exciple with or without isidia, maculae or pseudocyphellae. Ascospores simple, subglobose to ellipsoid, colourless, 8 per ascus. Pycnidia present or absent.