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SPECIES ATLAS · INOCYBE

Inocybe haemacta

Named by (Berk. & Cooke) Sacc., 1887

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.

Berkeley and Cooke published Agaricus haemactus in Grevillea in 1882, from a British collection (holotype K(M)). Saccardo moved it to Inocybe in 1887. R. Heim later treated it as a form of I. corydalina, but Species Fungorum accepts it as a species.

Named
(Berk. & Cooke) Sacc., 1887
First published as
Agaricus haemactus Berk. & Cooke (1882)
Other names in the records
Agaricus haemactus Berk. & Cooke, Inocybe corydalina f. haemacta (Berk. & Cooke) R. Heim, Inocybe haemacta var. rubra Rea
Type specimen
Great Britain; holotype K(M), anon., October 1882 (Index Fungorum). (Index Fungorum record, Agaricus haemactus)
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. 1985

    Confirmed Psilocybin, baeocystin and psilocin found in an Austrian 1982 collection; identity also confirmed by conversion to psilocin and UV spectrum; muscarine absent

    Method: TLC in three systems, HPLC, derivatisation, UV spectrum. Stijve, Klán & Kuyper 1985, Persoonia 12: 469-473 (full text, archive.org, CC BY)

  2. 1985

    Reported Psilocybin detected in a collection from Augsburg (1981); muscarine not clearly detected

    Method: high-resolution TLC. Besl & Mack 1985, Z. Mykol. 51: 183-184 (full text, Zobodat, CC BY-ND)

  3. 2003

    Reported Included among Czech mushrooms analysed for psilocybin and psilocin; the abstract does not give a per-species result

    Method: GC/MS after silylation. Stříbrný, Borovička & Sokol 2003, Soudní lékařství 48: 45-49 (abstract)

What the record doesn’t show: The analyses are from the 1980s (plus one 2003 abstract without species results), all on European material.

Records on file.

GBIF, the global biodiversity database, held 870 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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