Synonymy:
Agaricus rancidus Fr., Systema Mycologicum 1: 141 (1821)
Collybia rancida (Fr.) Quél., Mém. Soc. Émul. Montbéliard, Sér. 2 5: 99 (1872)
Marasmius rancidus (Fr.) P. Karst., Bidr. Känn. Finl. Nat. Folk 48: 105 (1889)
Tephrophana rancida (Fr.) Kühner, Bull. mens. Soc. linn. Soc. Bot. Lyon 7: 210 (1938)
Lyophyllum rancidum (Fr.) Singer, Annls mycol. 41(1/3): 103 (1943)

Agaricus rancidus var. bullatus Fr., Icon. Sel. Hymenomyc. 1(7/8): 69 (1873)
Collybia rancida var. bullata (Fr.) P. Karst., Bidr. Känn. Finl. Nat. Folk 32: 158 (1879)

Tephrocybe rancida f. submarginata Grilli & Marulli, in Grilli, Docums Mycol. 24(no. 95): 32 (1994)

Tephrocybe rancida var. griseocaerulea Bon, Docums Mycol. 29(no. 115): 34 (1999)

Position in classification:
Lyophyllum, Lyophyllaceae, Agaricales, Agaricomycetidae, Agaricomycetes, Basidiomycota, Fungi

Note:
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