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The Shroomverse alien by an alder-lined river delta in foggy western Washington.

SPECIES ATLAS · PSILOCYBE

Psilocybe cyanofibrillosa

Named by Guzmán & Stamets, 1980

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.

Guzmán and Stamets described Psilocybe cyanofibrillosa in 1980, in a Mycotaxon paper by Stamets, Beug, Bigwood and Guzmán (11: 476-484). The holotype, Stamets 79-8, is at the ENCB herbarium and comes from Washington. Species Fungorum lists no synonyms.

Named
Guzmán & Stamets, 1980
Type specimen
Washington (Species Fungorum: holotype ENCB, Stamets 79-8) (Species Fungorum record 113343; pin = Wikidata coordinates for Washington State (Q1223))
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. 1980

    Reported Psilocybin and psilocin detected in three collections, including the type; two 1978 herbarium collections had lost most of both

    Method: HPLC (reversed phase, UV at 254 nm), confirmed by TLC with Ehrlich's reagent. Stamets, Beug, Bigwood & Guzmán 1980, Mycotaxon 11: 476-484 (archive.org scan of vols 11-12)

What the record doesn’t show: The only analysis is the one published with the description in 1980, and GBIF holds just 23 records under the name.

Records on file.

GBIF, the global biodiversity database, held 23 occurrence records under this name, 9 of them from Canada, when we checked on October 25, 2026. GBIF held 9 Canadian records on 25 October 2026, all preserved specimens from British Columbia. 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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