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SPECIES ATLAS · PSILOCYBE

Psilocybe tampanensis

Named by Guzmán & S.H. Pollock, 1978

Psilocybin record: reported (one or older reports)

Full article: Psilocybe Tampanensis: 1978 Record and Names

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.

Guzmán and Pollock published Psilocybe tampanensis in Mycotaxon 7(2): 373 in 1978. The holotype, collected by Pollock in Florida on 3 September 1977, is at ENCB, and Pollock grew cultures from a spore print of the type. Guzmán (1983) notes that the name refers to the place the type was collected.

Named
Guzmán & S.H. Pollock, 1978
Type specimen
Florida (Species Fungorum: holotype ENCB, Pollock, 3 Sept. 1977) (Species Fungorum record 321959; pin = Wikidata coordinates for Florida (Q812))
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. 2025

    Confirmed Psilocybin and psilocin measured in cultivated strains confirmed as P. tampanensis by ITS, including strains sold as 'Mexicana' and as P. galindoi

    Method: HPLC-DAD and HPLC-MS/MS. Cohen et al. 2025, Sci. Rep. 15: 13822

What the record doesn’t show: When Guzmán wrote in 1983 the species had not been analysed (he wrote that it 'very probable contains psilocybin'), and the one analysis found is of cultivated strains, not of wild material.

Records on file.

GBIF, the global biodiversity database, held 62 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.

See the name on GBIF

Sources

Compiled from the sources above; last checked .

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