Mycotaxon 33: 402 (1988).

Basionym: Parmelia ceresina Vain., Ann. Univ. Stellenbosch 9A: 13 (1931).

Thallus: adnate on rock, 3-8 cm broad, darkish yellow green; lobes subirregular to sublinear, 0.8-2 mm wide, imbricate; upper surface continuous, shiny, transversely cracked an rugulose with age, soredia and isidia lacking; medulla white; lower surface plane, pale to dark brown, shiny, moderately rhizinate, the rhizines brown, stout, simple, 0.3-0.8 mm long. Pycnidia common; conidia cylindrical, 0.5 x 4-6 µm. Apothecia common, substipitate, 3-5 mm in diameter, the rim entire to crenate; spores 4-6 x 9-11 µm.

Chemistry: Fumarprotocetracic, succinprotocetraric, and usnic acids.