Homotypic Synonyms See Note

Basionym Name:
Lichen diffusus Weber, Spicil. fl. goetting.: 250 (1778)

Homotypic synonyms:
Cetraria diffusa (Weber) Lynge, Stud. Lich. Fl. Nowag.: 179 (1921)
Parmelia aleurites f. diffusa (Weber) Ach., Syn. meth. lich. (Lund): 208 (1814)
Parmelia aleurites var. diffusa (Weber) Ach., Lich. Univ.: 485 (1810)
Parmelia diffusa (Weber) Rebent., Prodr. fl. neomarch. (Berolini): 301 (1804)
Parmelia diffusa var. diffusa (Weber) Rebent., Prodr. fl. neomarch. (Berolini): 301 (1804)
Parmeliopsis aleurites f. diffusa (Weber) Grummann, in Hillmann & Grummann, Krypt.-Fl. Brandenburg (Leipzig) 8: 597 (1957)
Parmeliopsis aleurites var. diffusa (Weber) Riddle, Bryologist 20(no. 5): 74 (1917)
Parmeliopsis diffusa (Weber) Riddle, Bryologist 20: 75 (1917)
Parmeliopsis pallescens f. diffusa (Weber) Hillmann, Verh. bot. Ver. Prov. Brandenb. 74: 123 (1933)
Parmeliopsis placorodia f. diffusa (Weber) Nyl., Syn. meth. lich. (Parisiis) 2: 55 (1869)
Platysma diffusum (Weber) Nyl., Flora, Regensburg 55: 247 (1872)
Platysma diffusum var. diffusum (Weber) Nyl., Flora, Regensburg 55: 247 (1872)