Lichen Fl. U.S: 358 (1935).
Basionym: Placodium cerinum var. ulmorum Fink, Contr. U.S. Nat. Herb. 14: 215 (1910).
Synonym: Index Fungorum
Type: USA, Kansas, Rooks Country, on Juniperus virginiana, 7.11.1893, E. Bartholomew (MICH 00062622 - lectotype designated by Wetmore 2007, MICH 00067693 - isolectotype).
Thallus:
Photobiont:
Chemistry:
Ecology:
Molecular data: Genbank
Distribution: Database
Note: