Thallus crustaceous-leprose, diffuse, forming scattered aggregations of granules which in places tend to merge to form a non-areolate crust, deep yellow with a slightly orange tinge. Surface composed entirely of a mass of pulverulent, minutely spherical granules to 0.1 mm diam., cortex absent and thallus unstratified, being yellow throughout, thallus margin absent, prothallus not apparent. Hyphae 2-3 µm diam., colourless, obscured by numerous crystals. Sporocarps and pycnidia absent. Chemistry: Thallus C- or faint orange, K+ violet-red. Parietin.