Basionym: Agaricus luteo-olivaceus Berk. & M.A. Curtis, Annals and Magazine of Natural History 4: 286 (1859) [MB#546771] Obligate synonyms: - Collybia luteo-olivacea (Berk. & M.A. Curtis) Sacc., Sylloge Fungorum 5: 215 (1887) [MB#153158] - Agaricus luteoolivaceus Berk. & M.A. Curtis (1859) [MB#490522] - Callistosporium luteoolivaceum (Berk. & M.A. Curtis) Singer (1946) [MB#539207] - Callistosporium luteoolivaceum (Berk. & M.A. Curtis) Singer (1946) [MB#541558] - Collybia luteoolivacea (Berk. & M.A. Curtis) Sacc. (1887) [MB#541570] Taxonomic synonyms: - Callistosporium psilocybe Murrill & Singer, Mycologia 36: 363 (1944) [MB#284699] - Calocybe olivascens (R. Maire) Singer, Annales Mycologici 41: 107 (1943) [MB#293922] - Psilocybe floridana Murrill, Proceedings of the Florida Academy of Sciences 7 (2-3): 126 (1945) [MB#290109] - Callistosporium luteofuscum Singer, Lilloa 26: 115 (1954) [MB#293899] - Callistosporium favrei Singer, Sydowia 30 (1-6): 262 (1978) [MB#310063] - Callistosporium majus Singer, Sydowia 30 (1-6): 262 and 263 (1978) [MB#310065] - Collybia xanthophylla Malençon & Bertault, Doc. Mycol.: 52 (1975) [MB#311537] - Callistosporium xanthophyllum (Malençon & Bertault) Bon, Doc. Mycol.: 52 (1976) [MB#310068] - Callistosporium luteofuscum var. maior Singer, Beihefte zur Nova Hedwigia 29: 53 (1969) [MB#353309] - Agaricus coloreus Peck, Bulletin of the Buffalo Society of Natural Sciences 1: 46 (1873) [MB#521627] - Collybia colorea (Peck) Sacc., Annual Report on the New York State Museum of Natural History 49: 65 (1896) [MB#146890] - Agaricus rubescentifolius Peck, Annual Report on the New York State Museum of Natural History 39: 38 (1886) [MB#521628] - Tricholoma rubescentifolium (Peck) Sacc. (1891) [MB#186923] - Collybia rubescentifolia (Peck) Peck, Annual Report on the New York State Museum of Natural History 41: 83 (1888) [MB#521629] - Collybia colorea var. rubescentifolia (Peck) Peck, Annual Report on the New York State Museum of Natural History 49: 65 (1896) [MB#521630]