Basionym: Agaricus seminudus Lasch, Linnaea 3: 157 (1828) [MB#355963] Obligate synonyms: - Lepiota seminuda (Lasch) P. Kumm., Der Führer in die Pilzkunde: 136 (1871) [MB#204777] - Cystoderma seminudum (Lasch) Fayod, Annales des Sciences Naturelles Botanique ser. 7, 9: 351 (1889) [MB#455927] - Lepiota sistrata var. seminuda (Lasch) Quél., Mémoires de la Société d'Émulation de Montbéliard ser. 2, 5: 231 (1872) [MB#500414] - Cystoderma seminudum (Lasch) Singer (1945) [MB#548190] Taxonomic synonyms: - Lepiota seminuda f. minima J.E. Lange, Flora Agaricina Danica 1: 36 (1935) [MB#254652] - Cystolepiota sistrata var. minima (J.E. Lange) anon. ined. (1976) [MB#438239] - Lepiota sistrata f. minima (J.E. Lange) Babos, Annales Historico-Natureles Musei Nationalis Hungarici 50: 91 (1958) [MB#349730] - Lepiota sistrata var. minima (J.E. Lange) anon. (?) [MB#438599] - Lepiota sororia Huijsman, Persoonia 1 (3): 326 (1960) [MB#333144] - Cystolepiota sororia (Huijsman) Singer, Beihefte zur Sydowia 7: 67 (1973) [MB#312559] - Cystolepiota seminuda var. sororia (Huijsman) Gminder, Die Großpilze Baden-Württembergs 4: 443 (2003) [MB#487640]