Thallus dimorphic consisting of a squamulose, areolate or nodular-papillate primary thallus and erect or ± decumbent pseudopodetia. Pseudopodetia radiate and ± terete at first near base, becoming flattened, expanded and ± leaf-like above. Cortex horny, of strong, cartilaginous, nerve-like strands forming a ± netlike cylinder enclosing a rather loosely developed, medulla. Photobiont green, . Apothecia terminal, disc plane to convex, often developed only on one side (ventral) of the supporting pseudopodetium, marginate or immarginate and ± thickened below. Ascospores often difficult to find, 8 per ascus, simple, colourless, ellipsoid, clavate, straight or curved 7-10 × 2-3 µm. Pycnidia marginal on squamules of primary thallus, black, bottle-shaped or cylindrical, with a gaping apical ostiole.