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SPECIES ATLAS · RICKENELLA

Rickenella fibula

Named by (Bull.) Raithelh., 1973

Psilocybin record: disputed

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.

Bulliard described Agaricus fibula in 1784 in Herbier de la France, typified by his plate. Raithelhuber moved it to Rickenella in 1973 (Metrodiana 4: 67), the name accepted today.

Named
(Bull.) Raithelh., 1973
First published as
Agaricus fibula Bull. (1784)
Other names in the records
Agaricus fibula Bull., Gerronema fibula (Bull.) Singer
Type specimen
France: Bulliard's name is typified by his plate (Herbier de la France, tab. 186), per Index Fungorum. (Index Fungorum record, Agaricus fibula; pin = Wikidata coordinates (Q142))
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. 1986

    Disputed Psilocybin reported by Gartz (Biochem. Physiol. Pflanzen 181: 275-278), as cited by Stijve & Kuyper 1988

    Method: TLC (per Stijve & Kuyper 1988). Stijve & Kuyper 1988, Persoonia 13(4): 463-465 (Naturalis repository, full text)

  2. 1988

    Not detected No psilocybin or related tryptamines in three collections from the Netherlands and Switzerland; only 5-hydroxytryptophan found

    Method: TLC and HPLC (detection limit 0.005% dry weight). Stijve & Kuyper 1988, Persoonia 13(4): 463-465 (Naturalis repository, full text)

What the record doesn’t show: One unrepeated positive report, read only through the paper that contradicts it.

Records on file.

GBIF, the global biodiversity database, held 39,433 occurrence records under this name, 259 of them from Canada, when we checked on October 25, 2026. GBIF lists 259 occurrence records from Canada under this name (checked 2026-10-25); the records are not verified identifications. 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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