Basionym Name:Usnea barbata var. sorediifera Arnold, Verh. Kaiserl.-Königl. zool.-bot. Ges. Wien 25: 471 (1875)
Homotypic synonyms:Usnea barbata f. sorediifera (Arnold) Arnold, Flora, Regensburg 67: 67 (1884)Usnea florida var. sorediifera (Arnold) Hue, Bull. Acad. Intern. Géogr. Bot. 9: 253 (1900)Usnea hirta var. sorediifera (Arnold) Jatta, Fl. ital. crypt. (Florence) 3: 145 (1909)Usnea sorediifera (Arnold) Lynge, Stud. Lich. Fl. Norway: 229 (1921)Usnea sorediifera f. sorediifera (Arnold) Lynge, Stud. Lich. Fl. Norway: 229 (1921)Usnea sorediifera subsp. sorediifera (Arnold) Lynge, Stud. Lich. Fl. Norway: 229 (1921)Usnea sorediifera var. sorediifera (Arnold) Lynge, Stud. Lich. Fl. Norway: 229 (1921)