Basionym: Agaricus swartzii Fr., Observationes mycologicae 1: 90 (1815) [MB#186652] Obligate synonyms: - Mycena swartzii (Fr.) A.H. Sm., North American species of Mycena: 123 (1947) [MB#288557] - Omphalina swartzii (Fr.) Kotl. & Pouzar, Ceská Mykologie 20 (3): 136 (1966) [MB#438772] - Agaricus fibula var. swartzii (Fr.) Fr., Systema Mycologicum 1: 164 (1821) [MB#457190] - Omphalina fibula var. swartzii (Fr.) Quél., Enchiridion Fungorum in Europa media et praesertim in Gallia Vigentium: 46 (1886) [MB#461193] - Omphalia swartzii (Fr.) Quél. (1885) [MB#183332] - Omphalia fibula var. swartzii (Fr.) P. Karst. (?) [MB#438762] - Omphalia flavida var. swartzii (Fr.) anon. (?) [MB#454862] - Omphalina flavida var. swartzii (Fr.) Quél., Enchiridion Fungorum in Europa media et praesertim in Gallia Vigentium: 46 (1886) [MB#123821] - Omphalia grisea var. swartzii (Fr.) anon. ined. (1983) [MB#438763] - Mycena fibula var. swartzii (Fr.) Kühner, Encyclopédie Mycologique 10: 608 (1938) [MB#536840] Taxonomic synonyms: - Agaricus setipes var. acrocyaneus Fr., Hymenomycetes europaei: 164 (1874) [MB#456866] - Mycena fibula var. schwartzii (Fr.) Kühner (1938) [MB#454344]