Synonymy:
Xyloma ledi Alb. & Schwein., Consp. fung. (Leipzig): 60 (1805)
Phacidium ledi (Alb. & Schwein.) J.C. Schmidt, in Kunze & Schmidt, Mykologische Hefte (Leipzig) 1: 31 (1817)
Pragmoparopsis ledi (Alb. & Schwein.) Höhn., Annls mycol. 15(5): 320 (1917)
Encoeliopsis ledi (Alb. & Schwein.) J.W. Groves, Canad. J. Bot. 47: 1325 (1969)

Phacidium callunae P. Karst., Not. Sällsk. Fauna et Fl. Fenn. Förh., Ny Ser. 11: 256 (1870) [1871]
Pseudophacidium callunae (P. Karst.) P. Karst., Acta Soc. Fauna Flora fenn. 2(no. 6): 157 (1885) [1881-1885]
Myxophacidium callunae (P. Karst.) Höhn., Sber. Akad. Wiss. Wien, Math.-naturw. Kl., Abt. 1 126(4-5): 301 (1917)
Myxophacidiella callunae (P. Karst.) Höhn., Sber. Akad. Wiss. Wien, Math.-naturw. Kl., Abt. 1 126(4-5): 302 (1917)

Phacidium callunae var. betulae Rehm, Fung. Saxon. Exsicc., Pilze Sachsen's: no. 90 (1881)

Hypoderma cassandrae Ellis & Everh., Proc. Acad. nat. Sci. Philad. 46(3): 347 (1894)
Hypodermopsis cassandrae (Ellis & Everh.) Kuntze, Revis. gen. pl. (Leipzig) 3(3): 487 (1898)

Position in classification:
Pseudophacidium, Phacidiaceae, Phacidiales, Leotiomycetidae, Leotiomycetes, Ascomycota, Fungi

Note:
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