Synonymy:
Lichen flavorubescens Huds. [as 'flavo-rubescens'], Fl. Angl.: 443 (1762)
Caloplaca flavorubescens (Huds.) J.R. Laundon, Lichenologist 8(2): 147 (1976)
Gyalolechia flavorubescens (Huds.) Søchting, Frödén & Arup, in Arup, Søchting & Frödén, Nordic J. Bot. 31(1): 70 (2013)

Parmelia microthelia Ach., Methodus qua omnes detectos Lichenes Secundum Organa Carpomorpha ad Genera, Species et Varietates Redigere atque Observationibus Illustrare Tentavit Erik Acharius: 174 (1803)
Lecanora salicina var. microthelia (Ach.) Ach., Lich. Univ.: 401 (1810)
Lecanora salicina f. microthelia (Ach.) Ach., Syn. meth. lich. (Lund): 175 (1814)
Lecanora aurantiaca var. microthelia (Ach.) Nyl., Lich. Scand. (Helsinki): 142 (1861)
Caloplaca salicina f. microthelia (Ach.) Verseghy [as 'microthallina'], Stud. Bot. Hungar. 8: 42 (1973)
Caloplaca flavorubescens f. microthelia (Ach.) Verseghy, Bot. Közl. 74-75(1-2): 33 (1988) [1987]

Patellaria oblitterata f. populina Wallr., Fl. crypt. Germ. (Norimbergae) 1: 385 (1831)

Caloplaca quercina Flagey, Rev. Mycol., Toulouse 13(no. 51): 114 (1891)
Caloplaca flavorubescens var. quercina (Flagey) Giralt, Nimis & Poelt, Cryptog. Bryol.-Lichénol. 13(3): 273 (1992)
Gyalolechia flavorubescens var. quercina (Flagey) Nimis, The lichens of Italy, A second annotated catalogue (Trieste): 19 (2016)

Position in classification:
Opeltia, Teloschistaceae, Teloschistales, Lecanoromycetidae, Lecanoromycetes, Ascomycota, Fungi

Note:
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