Homotypic Synonyms See Note

Basionym Name:
Lichen cretaceus Sm., in Smith & Sowerby, Engl. Bot. 11: [738] (1800)

Homotypic synonyms:
Collema cretaceum (Sm.) Ach., Lich. Univ.: 642 (1810)
Enchylium cretaceum (Sm.) Gray, Nat. Arr. Brit. Pl. (London) 1: 398 (1821)
Homodium cretaceum (Sm.) Nyl., Lich. Envir. Paris: 17 (1896)
Leptogium cretaceum (Sm.) Nyl., Mém. Soc. Imp. Sci. Nat. Cherbourg 3: 165 (1855)
Lichen furvus * cretaceum (Sm.) Lam., Encycl. Méth. Bot., Suppl. (Paris) 3(2): 415 (1813)
Parmelia cretacea (Sm.) Ach., Methodus, Sectio post. (Stockholmiæ): 248 (1803)
Polychidium cretaceum (Sm.) Trevis., Rc. Ist. Lomb., Milano, ser. 2 13: 74 (1880)