shroomverse
The Shroomverse alien in a birch forest on the shore of a Great Lake in Michigan in autumn.

SPECIES ATLAS · PLUTEUS

Pluteus americanus

Named by (P. Banerjee & Sundb.) Justo, E.F. Malysheva & Minnis, 2014

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.

Banerjee and Sundberg described Pluteus salicinus var. americanus in Mycotaxon in 1993, from a Michigan collection (holotype MICH, Smith 57841). Justo, Malysheva, Minnis and colleagues raised it to species rank in 2014 in Phytotaxa, in a DNA study of Pluteus section Pluteus.

Named
(P. Banerjee & Sundb.) Justo, E.F. Malysheva & Minnis, 2014
First published as
Pluteus salicinus var. americanus P. Banerjee & Sundb. (1993)
Other names in the records
Pluteus salicinus var. americanus P. Banerjee & Sundb.
Type specimen
Michigan, USA; holotype MICH, Smith 57841 (Index Fungorum, for the basionym). (Index Fungorum record, Pluteus salicinus var. americanus)
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. 2022

    Confirmed Aeruginascin, baeocystin, norbaeocystin, psilocin and psilocybin quantified in six fruiting bodies from three collections; the authors say it had been 'supposed to be psychotropic' because it blues

    Method: UHPLC-MS/MS. Gotvaldová et al. 2022, Int. J. Mol. Sci. 23: 14068 (full text, PMC9693126)

What the record doesn’t show: Only one published analysis under this name was found; older work may have studied it as P. salicinus.

Records on file.

GBIF, the global biodiversity database, held 414 occurrence records under this name, 55 of them from Canada, when we checked on October 25, 2026. GBIF held 55 Canadian occurrence records on 25 October 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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