Distribution: N - Ven (Nascimbene 2003, 2004, 2005c, Baruffo & al. 2006). C - Marc (Nimis & Tretiach 1999, Baruffo & al. 2006), Abr (Nimis & Tretiach 1999).
Description: Thallus leprose, episubstratic, whitish to cream-coloured, clearly delimited, usually rosette-forming, often falling off in the central parts, consisting of a soft mass of soredia-like granules. Medulla white, well-developed and thick. Apothecia and pycnidia not known. Photobiont chlorococcoid. Spot tests: K+ yellow, C+ bright yellow, KC+ yellow-orange, P+ yellow. Chemistry: atranorin, eugenitol, flavescin, sordidone and 4 unknown substances.
Note: on vertical to underhanging surfaces of weathered or fissured calcareous rocks seldom wetted by rain, often in woodlands, mostly in natural habitats; certainly more widespread. According to Grube & al. (2004) the species is closely related to Lecanora swartzii.
Growth form: Leprose
Photobiont: green algae other than Trentepohlia
Reproductive strategy: mainly asexual, by soredia, or soredia-like structures (e.g. blastidia)