Basionym Name:Buellia oidalea var. penichra Tuck., Syn. N. Amer. Lich. (Boston) 2: 99 (1888)
Homotypic synonyms:Buellia penichra (Tuck.) Hasse, Contr. U.S. natnl. Herb. 17(1): 122 (1913)Diplotomma penichrum (Tuck.) Szatala, Borbásia 3(8-10): 134 (1941)Lecidea oidalea var. penichra (Tuck.) Nyl., Lich. Japon.: 81 (1890)Rhizocarpon penichrum (Tuck.) G. Merr., in Millspaugh & Nuttal, Flora Catalina Island: 367 (1923)