shroomverse
The Shroomverse alien in a high pine meadow below a snow-capped volcano in central Mexico.

SPECIES ATLAS · PSILOCYBE

Psilocybe aztecorum

Named by R. Heim, 1957

Psilocybin record: reported (one or older reports)

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.

Roger Heim published Psilocybe aztecorum in the Revue de Mycologie 22(1): 78 in 1957, with a holotype from México State (holotype PC 0096811). Guzmán's P. bonetii became var. bonetii in 1978 and is now a synonym. P. quebecensis, published by Ola'h and Heim in 1967 from Québec, is also filed here by Species Fungorum and GBIF, a synonymy our journal article on that name could not trace to its source.

Named
R. Heim, 1957
Other names in the records
Psilocybe quebecensis Ola'h & R. Heim (1967), Psilocybe bonetii Guzmán (1970 [1968]), Psilocybe aztecorum var. bonetii (Guzmán) Guzmán (1978)
Type specimen
México State (Species Fungorum: holotype PC 0096811) (Species Fungorum record 304476; pin = Wikidata coordinates for the State of Mexico (Q82112))
Name record
Species Fungorum
The pin marks the type locality at the level of detail the record gives: one historical collection, not a range or a place to look. Land outlines: Natural Earth.

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.

  1. 1958

    Reported Psilocybin reported by Heim & Hofmann (1958), as cited in Guzmán 1983 (Table 11 and species account)

    Method: not stated in the source we read. Guzmán 1983, The Genus Psilocybe (Beih. Nova Hedwigia 74), archive.org scan

  2. 1967

    Reported As P. quebecensis: Guzmán 1983 writes that Ola'h and Heim isolated psilocybin and psilocin from cultures and wild material; the 1967 note's title calls the species hallucinogenic

    Method: not read (paper not opened). Ola'h & Heim 1967, C. R. Acad. Sci. Paris Sér. D 264: 1601-1604 (Europe PMC record)

  3. 1976

    Reported As var. bonetii: psilocybin listed for Ott & Guzmán (1976) in Guzmán 1983 Table 11

    Method: not read (paper not opened). Ott & Guzmán 1976, Lloydia 39: 258-260 (Europe PMC record)

What the record doesn’t show: No modern chemical analysis was found, the counts mix in the synonym P. quebecensis, and the one Ontario specimen filed as P. quebecensis (NY1901130) was redetermined as P. caerulipes in 2024.

Records on file.

GBIF, the global biodiversity database, held 205 occurrence records under this name, 32 of them from Canada, when we checked on October 25, 2026. GBIF held 32 Canadian records on 25 October 2026 (17 Quebec, 4 New Brunswick, 3 Ontario, 2 Nova Scotia, 1 Newfoundland and Labrador, 5 without a province), part of them filed as P. quebecensis, which alone had 10 Canadian records. Records include unverified observations and old misidentifications, so counts show where people have recorded the name, not where it grows.

See the name on GBIF

Sources

Compiled from the sources above; last checked .

Save to Pinterest