Distribution: N - Frl (Tretiach & Hafellner 2000), Ven, Lomb, Piem (Morisi & Sereno 1995, Piervittori 2003, Isocrono & al. 2006, 2007), VA (Piervittori & Isocrono 1997, 1999). C - Tosc (Benesperi 2006), Sar (Nöske 2000, Nöske & al. 2000, Rizzi & al. 2011). S - Camp (Aprile & al. 2002), Cal (Puntillo 1996), Si (Caniglia & Grillo 2003, Grillo & Caniglia 2004, 2006).
Description: Thallus leprose-woolly, of scattered granules or continuous to cracked, bright golden yellow, ecorticate, easily separated from the substrate, usually forming extensive, irregularly spreading, to c. 1.0 mm thick patches, consisting of bright yellow, 40-75 μm thick, irregular granules which become paler toward base. Apothecia and pycnidia unknown. Photobiont chlorococcoid. Spot tests: K+ faintly orange, C-, KC+ faintly reddish, P-, UV+ orange. Chemistry: calycin, vulpinic acid and sometimes zeorin (minor)
Note: a widespread lichen found in underhangs and crevices of siliceous rocks in shaded, humid situations, limited to areas with high air humidity; widespread throughout the Alps, also occurs in the siliceous mountains of southern Italy and of Sardegna.