Basionym Name:Parmelia roystoneae Vicente & L. Xavier, [as 'roystonea'] Rev. Bryol. Lichénol. 45(4): 471 (1979)
Homotypic synonyms:Punctelia roystoneae (Vicente & L. Xavier) Hale ex DePriest & B.W. Hale, [as 'roystonea'] Mycotaxon 67: 205 (1998)