Basionym Name:Parmelia hypotropa Nyl., Syn. meth. lich. (Parisiis) 1(2): 378 (1860)
Homotypic synonyms:Imbricaria hypotropa (Nyl.) Jatta, G. bot. ital., n.s. 9: 471 (1902)Parmelia perforata var. hypotropa (Nyl.) Tuck., Syn. N. Amer. Lich. (Boston) 1: 53 (1882)Parmotrema hypotropum (Nyl.) Hale, Phytologia 28(4): 337 (1974)