Thallus crustose, leprose, with powdery appearance; pale green with grey-yellow tinge, becoming more distinctly grey-yellow in herbarium; thin, firmly attached to the substrate; shape irregular, discontinuous to partly continuous, in diam.; margin diffuse, lobes absent; cortex absent; medulla rarely present in thicker parts of thallus, indistinct, white; squamules absent; rarely soredia mixed with some medullary hyphae, soredia abundant, very fine, up to 35 µm in diam., loosely packed, very fragile; wall poorly developed; consoredia sometimes present, loosely packed, to 50 µm; isidia-like structures absent. Photobiont green, coccoid, up to 10 µm in diam.
