Distribution: N - TAA, Piem (Craighero 2010), VA, Lig. C - Tosc (Craighero 2010, Ravera & al. 2016), Marc (Craighero 2010), Laz (Craighero 2010), Abr (Craighero 2010), Sar (Monte 1993, Nöske 2000, Craighero 2010, Brackel & Berger 2019). S - Cal (TSB 6808).
Description: Thallus crustose, episubstratic, rather thin, rimose-areolate, pale or dark grey, sometimes delimited by a thin, black prothalline line. Soralia 0.3-1 mm across, at first punctiform, then maculiform and more or less orbicular, finally sometimes confluent, convex, whitish, with coarsely granular soredia; sparse cylindrical isidia-like outgrowths sometimes also present. Apothecia and pycnidia unknown. Photobiont chlorococcoid. Spot tests: thallus K+ yellow turning yellow-brown, C-, KC-, P+ yellow turning rust-red to bright red, sometimes P+ orange, UV-. Chemistry: protocetraric acid (major), succinprotocetraric acid (major),
Note: on siliceous rocks in upland areas. According to Roux & coll. (2014) this species is very closely related to, but distinct from L. aspergilla.
Growth form: Crustose
Photobiont: green algae other than Trentepohlia
Reproductive strategy: mainly asexual, by soredia, or soredia-like structures (e.g. blastidia)