Basionym Name:Collema compactum Ach., Syn. meth. lich. (Lund): 313 (1814)
Homotypic synonyms:Collema pulposum f. compactum (Ach.) Leight., Lich.-Fl. Great Brit., Edn 3: 18 (1879)Collema pulposum var. compactum (Ach.) Nyl., Syn. meth. lich. (Parisiis) 1(1): 109 (1858)Eucollema pulposum f. compactum (Ach.) Horw., Hand-list Lich. Gr. Brit.: 6 (1912)Parmelia compacta (Ach.) Wallr., Fl. crypt. Germ. (Norimbergae) 1: 550 (1831)