Basionym Name:Polycauliona sparsa C.W. Dodge & G.E. Baker, Ann. Mo. bot. Gdn 25: 629 (1938)
Homotypic synonyms:Caloplaca sparsa (C.W. Dodge & G.E. Baker) Cretz., Bull. Grăd. Bot. Muz. Bot. Univ. Cluji 21: 140 (1941)Caloplaca sparsa var. sparsa (C.W. Dodge & G.E. Baker) Cretz., Bull. Grăd. Bot. Muz. Bot. Univ. Cluji 21: 140 (1941)