Synonyms: Lecanora subcarnea var. ochroidea (Ach.) Ach.; Zeora subcarnea var. ochroidea (Ach.) Arnold
Distribution: N - Lig (Brunialti & al. 1999). C - Laz, Sar (Dickhauser & al. 1995 Nöske 2000).
Description: Thallus crustose, episubstratic, continuous to rimose-areolate, white, ochraceous or pale grey, pruinose, usually forming large patches, delimited by a whitish, fimbriate prothallus. Areoles uneven, flat to weakly convex, the surface granulose, the margins often crenulate. Apothecia lecanorine, 0.5-2(-2.5) mm across, sessile and constricted at base, with a pinkish brown to pale grey-brown, but usually densely white-pruinose, convex disc, and an entire, finally sometimes excluded thalline margin. Thalline exciple ecorticate, with numerous small crystals; epithecium grey-brown, granular, K+ red (needle-like crystals); hymenium colourless, 50-70(-100) μm high; paraphyses simple or sparingly branched in upper part, 1.5-2 μm thick, the apical cell subglobose, to 3.5 μm wide. Asci 8-spored, clavate, very thin-walled, with a K/I+ blue, tall tholus penetrated by a faintly amyloid apical cushion, the wall K/I-, surrounded by a blue outer layer, Lecanora-type. Ascospores 1-celled, hyaline, ellipsoid, (8-)10-14 x (5-)6-9 μm, thin-walled. Photobiont chlorococcoid. Spot tests: thallus K+ yellow turning deep red (needle-like crystals), C-, KC-, P+ golden yellow to orange-red, UV+ pale orange. Chemistry: atranorin, chloratranorin, norstictic and connorstictic acids, variable amounts of salazinic acid.
Note: a mild-temperate to Mediterranean lichen found on subvertical or underhanging faces of basic siliceous rocks in humid areas; mainly Tyrrhenian in Italy.
Growth form: Crustose
Photobiont: green algae other than Trentepohlia
Reproductive strategy: mainly sexual
Most common in areas with a humid-warm climate (e.g. most of Tyrrenian Italy)