[4] The lichen has a creamy white to whitish-green thallus with a slightly roughened surface that is 0.1–1.0 mm thick, and a chalk-like medulla.

Apothecia, if present, have a circular outline, a diameter of 0.5–3.0 mm; the apothecial discs are pruinose, white- to dark grey in colour, and are surrounded by a thalline margin.

[5] The lichen is common in Mediterranean Europe, with a range extending west to southern Portugal and northern Morocco.

Its plant substrates include the bark of Ficus carica, Ceratonia siliqua, Rosmarinus officinalis, Juniperus phoenicea, Pinus halepensis, P. pinea, Pistacia lentiscus.

[6] A couple of collections of the lichen have been made in the Canary Islands, but it is thought that these are the result of introductions from importing plants to the botanical gardens, parks, or hotels.