Basionym: Mycena acutoconica Clem., Botanical Survey of Nebraska 2: 38 (1893) [MB#218389] Obligate synonyms: - Hygrophorus acutoconicus (Clem.) A.H. Sm., North American species of Mycena: 472 (1947) [MB#287114] - Prunulus acutoconicus (Clem.) Murrill, North American Flora 9 (5): 330 (1916) [MB#503466] Taxonomic synonyms: - Hygrocybe constans J.E. Lange, Dansk botanisk Arkiv 4 (4): 23 (1923) [MB#261816] - Hygrocybe langei Kühner, Le Botaniste 18: 174 (1927) [MB#372997] - Hygrophorus constans (J.E. Lange) anon. ined. (1940) [MB#463306] - Hygrophorus rickenii Maire, Bulletin de la Société Mycologique de France 46: 220 (1930) [MB#276540] - Hygrocybe aurantiolutescens P.D. Orton, Notes from the Royal Botanical Garden Edinburgh 29 (1): 103 (1969) [MB#332157] - Hygrophorus aurantiolutescens (P.D. Orton) Dennis, Fungi of the Hebrides: 47 (1986) [MB#114840] - Hygrocybe acutoconica var. aurantiolutescens (P.D. Orton) Migl. & Camboni, Micologia Italiana: 36 (2001) [MB#483732] - Hygrocybe persistens var. persistens , Revue de Mycologie (Paris) 5: 8 (1940) [MB#418772] - Hygrophorus conicus var. persistens Britzelm., Berichte des Naturwissenschaftlichen Vereins Schwaben Neuburg 30: 30 (1890) [MB#462549] - Hygrocybe persistens (Britzelm.) Singer, Revue de Mycologie (Paris) 5: 8 (1940) [MB#355874] - Hygrophorus persistens (Britzelm.) Britzelm., Berichte des Naturwissenschaftlichen Vereins Schwaben Neuburg 30: 30 (1893) [MB#186734] - Hydrocybe subrubra Murrill (1939) [MB#254946] - Hydrocybe californica Murrill (1916) [MB#188802] - Hygrocybe californica Murrill, North American Flora 9 (6): 382 (1916) [MB#546420] - Hygrophorus californicus (Murrill) Sacc. & Trotter, Sylloge Fungorum 23: 122 (1925) [MB#215370] - Hygrophorus californicus (Murrill) Murril, Mycologia 9 (1): 40 (1917) [MB#517709] - Hygrocybe subrubra Murrill, Bulletin of the Torrey Botanical Club 66: 159 (1939) [MB#546431] - Hygrophorus subruber (Murrill) Murrill, Bulletin of the Torrey Botanical Club 66: 160 (1939) [MB#254945] - Mycena acuto-conica Clem. (1893) [MB#581797]