Lecanora compallens Herk & Aptroot
Thallus crustose relatively thick, continuous and more or less immersed, whitish-glaucous, covered with numerous whitish to glaucous warts 0.1-0.2 mm in diameter at the base, being covered with punctiform soralia becoming confluent to form a layer of granular soredia covering almost the entire thallus, greenish-yellow with "mint-green" or bluish-green zones. Apothecia unknown. Photobiont: Trebouxia. Thallus: C-, K-, KC-, P-, UV-; soredia: C-, K+ dirty yellowish, P-, UV- (wet) or pale orange UV+ (dry). Species growing on the bark of well-exposed sides of isolated trees or trees, especially in towns.
N.B. Quite variable species and very diversely interpreted by the authors.
N.B. Lecanora strobilina is a closely related species with identical chemistry but it is smaller and has apothecia.
N.B. Lecanora expallens is very similar and differs only by its chemistry: C+ yellow-orange, to the point that some authors combine the two species!