Basionym Name:Parmelia congesta Kurok. & Filson, Bull. natn. Sci. Mus., Tokyo, B 1: 36 (1975)
Homotypic synonyms:Xanthoparmelia congesta (Kurok. & Filson) Elix & J. Johnst., in Elix, Johnston & Armstrong, Bull. Br. Mus. nat. Hist., Bot. 15(3): 212 (1986)