Thallus crustaceous, epi- or endosubstratic. When episubstratic the thallus is verrucose-granular, grey, greenish-grey, pale yellowish-green or dark green. Photobiont: . Apothecia well-stalked. Stalk tissue of strongly sclerotized, blackish-brown to greenish-brown hyphae. Mazaedium well-developed. Asci dissolved at early stages, cylindrical-clavate. Ascospores 1-septate, when mature, dark brown with thick walls. Spore wall often with distinctive ornamentation. Pycnidia sessile or slightly immersed, simple, spherical and with simple ostiole. Conidia broadly ellipsoid to short cylindrical, hyaline, simple. Chemistry: Containing β-orcinol depsides and depsidones, xanthones and tetronic acid derivatives.