Thallus dispersed as an indeterminate, scurfy, ± areolate crust, closely attached, often forming extensive colonies, corticolous. Lobes very minute, often only visible at margins of thallus, margins partly entire to completely and densely granular-sorediate. Upper surface lemon-yellow to mustard-yellow, often greenish in shaded habitats, ± densely granular-sorediate or minutely granular-isidiate. Medulla very thin, white. Lower surface whitish. Rhizines simple, pale, sparse. Apothecia rare (not seen in New Zealand material) minute, yellow orange-brown with a yellow, sorediate margin. Ascospores elliptical 6-15 × 4-6 µm. Chemistry: Calycin and pulvinic dilactone.