SPECIES ATLAS · PSILOCYBE
Psilocybe muliercula
Named by Singer & A.H. Sm., 1958
Psilocybin record: reported (one or older reports)- 1958name published
- 1analysis on file
- 0found nothing
- 103world records (GBIF)
- 0Canadian records
A history of a name and a chemistry record, not an identification guide. No name, picture or description can show that a wild mushroom is safe, and poisonous mushrooms are mistaken for magic mushrooms. If someone may have eaten a wild mushroom, call a poison centre without waiting for symptoms: 1-844-POISON-X in most of Canada, 1-800-463-5060 in Quebec. Call 911 if they’re unconscious, not breathing or having a seizure.
How it was named.
Singer and Smith described Psilocybe muliercula in 1958 in Mycologia 50: 142, from a Michoacán collection (Singer M1611). Heim's P. wassonii is treated as a synonym; Guzmán 1983 notes that Heim and Cailleux cultured it under that name.
- Named
- Singer & A.H. Sm., 1958
- Other names in the records
- Psilocybe wassonii R. Heim, Psilocybe angustipleurocystidiata Guzmán
- Type specimen
- Michoacán, Mexico (Index Fungorum: holotype MICH, Singer M1611). (Index Fungorum record, Psilocybe muliercula; pin = Wikidata coordinates (Q79861))
- Name record
- Species Fungorum name record
The psilocybin record.
Every analysis we could verify, oldest first, including results that found nothing. No amounts are given: they vary between collections and this is not a potency guide.
- 1958
Reported Psilocybin and psilocin reported (Heim & Wasson 1958; Heim & Hofmann 1958, sample studied as P. wassonii)
What the record doesn’t show: The only chemistry dates from 1958 and was read only through Guzmán 1983 and Bradshaw et al. 2022 Table S1.
Records on file.
GBIF, the global biodiversity database, held 103 occurrence records under this name, 0 of them from Canada, when we checked on October 25, 2026. Records include unverified observations and old misidentifications, so counts show where people have recorded the name, not where it grows.
Sources
- Species Fungorum name record
- GBIF species record
- GBIF occurrence counts by country
- GBIF Canadian records
- Wikidata, Michoacán (pin coordinates)
- Guzmán 1983, The Genus Psilocybe (Beih. Nova Hedwigia 74), Table 11, archive.org scan
- Bradshaw et al. 2022, Appl. Environ. Microbiol. 88(24), Table S1 (literature review of Psilocybe chemistry; full text PMC9764976)
- Index Fungorum record, Psilocybe muliercula
Compiled from the sources above; last checked .