Synonymy:
Agaricus lacmus Schumach., Enum. pl. (Kjøbenhavn) 2: 333 (1803)
Agaricus pratensis var. lacmus (Schumach.) Fr., Observ. mycol. (Havniae) 2: 117 (1818)
Hygrophorus subradiatus * lacmus (Schumach.) Fr., Epicrisis Systematis Mycologici: 329 (1838) [1836-1838]
Hygrophorus subradiatus var. lacmus (Schumach.) Fr., Epicrisis Systematis Mycologici: 329 (1838) [1836-1838]
Hygrophorus lacmus (Schumach.) Kalchbr., Icon. Sel. Hymenomyc. Hung. (Budapest) 1: 42 (1873)
Camarophyllus subradiatus subsp. lacmus (Schumach.) P. Karst., Bidr. Känn. Finl. Nat. Folk 32: 229 (1879)
Camarophyllus subradiatus * lacmus (Schumach.) P. Karst., Bidr. Känn. Finl. Nat. Folk 32: 229 (1879)
Hygrophorus subradiatus subsp. lacmus (Schumach.) Sacc., Syll. Fung. (Abellini) 5: 408 (1887)
Camarophyllus lacmus (Schumach.) J.E. Lange, Dansk bot. Ark. 9(no. 6): 96 (1938)
Hygrocybe lacmus (Schumach.) P.D. Orton & Watling, Notes R. bot. Gdn Edinb. 29(1): 131 (1969)

Hygrophorus subviolaceus Peck, Ann. Rep. Reg. N.Y. St. Mus. 53: 842 (1901) [1900]
Camarophyllus subviolaceus (Peck) Singer, Lilloa 22: 148 (1951) [1949]
Hygrocybe subviolacea (Peck) P.D. Orton & Watling, Notes R. bot. Gdn Edinb. 29(1): 132 (1969)
Cuphophyllus subviolaceus (Peck) Bon, Docums Mycol. 14(no. 56): 11 (1985) [1984]

Position in classification:
Cuphophyllus, Cuphophyllaceae, Agaricales, Agaricomycetidae, Agaricomycetes, Basidiomycota, Fungi

Note:
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