Basionym Name:Parmelia dubia var. caesiocinerea B. de Lesd., Bull. Soc. bot. Fr. 70: 843 (1923)
Homotypic synonyms:Parmelia borreri var. caesiocinerea (B. de Lesd.) Zahlbr., Cat. Lich. Univers. 6: 155 (1929)