Basionym: Agaricus sordidus Schumach., Enumeratio Plantarum, in Partibus Sællandiae Septentrionalis et Orientalis Crescentium 2: 341 (1803) [MB#457358] Obligate synonyms: - Tricholoma sordidum (Schumach.) P. Kumm., Der Führer in die Pilzkunde: 134 (1871) [MB#181254] - Rhodopaxillus sordidus (Schumach.) Maire, Annales Mycologici 11 (4): 338 (1913) [MB#357291] - Melanoleuca sordida (Schumach.) Murrill, Mycologia 6 (1): 3 (1914) [MB#495982] - Lepista nuda var. sordida (Schumach.) Maire, Étud. synth. genre Tricholoma (1916) [MB#500416] - Lepista domestica Murrill, Mycologia 7 (2): 106 (1915) [MB#495627] - Gyrophila sordida (Schumach.) Quél., Enchiridion Fungorum in Europa media et praesertim in Gallia Vigentium: 18 (1886) [MB#507648] Taxonomic synonyms: - Lepista sordida var. ianthina Bon, Documents Mycologiques 10 (37-38): 91 (1979) [MB#438602] - Clitocybe tarda Peck, Bulletin of the Torrey Botanical Club 24: 110 (1897) [MB#157125] - Lepista tarda (Peck) Murrill, North American Flora 10 (2): 110 (1917) [MB#495629] - Clitopilus tardus (Peck) Peck, Annual Report on the New York State Museum of Natural History 54: 167 (1902) [MB#492006] - Lepiota tarda (Peck) Murrill, N. Amer. Flora (1917) [MB#502712] - Agaricus nudus-praticola Alb. & Schwein. ex Sacc., Syll. Fung. 5: 139 (1887) [MB#189692]