Basionym Name:Isidium phymatodes var. phragmaeum Ach., Methodus, Sectio prior (Stockholmiæ): 139 (1803)
Homotypic synonyms:Isidium phragmaeum (Ach.) Röhl., Deutschl. Fl. (Frankfurt) 3(2): 135 (1813)Isidium phymatodes f. phragmaeum (Ach.) Ach., Syn. meth. lich. (Lund): 283 (1814)Pertusaria flavida f. phragmaea (Ach.) Oxner, Flora Lischaĭnikiv Ukraïni (Kiev) 2(1): 490 (1968)Pertusaria lutescens f. phragmaea (Ach.) Erichsen, Rabenh. Krypt.-Fl., Edn 2 (Leipzig) 9(5.1): 651 (1936)