SPECIES ATLAS · PSILOCYBE
Psilocybe liniformans
Named by Guzmán & Bas, 1977
Psilocybin record: reported (older analyses only)- 1977name published
- 2analyses on file
- 0found nothing
- 145world records (GBIF)
- 0Canadian records
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 Bas described Psilocybe liniformans in 1977 in Persoonia 9(2): 233, from the Netherlands. In 1980 Guzmán and Stamets added var. americana from Washington State (Mycotaxon 11(2): 480), which Index Fungorum now places under the species.
- Named
- Guzmán & Bas, 1977
- Other names in the records
- Psilocybe liniformans var. americana Guzmán & Stamets (1980)
- Type specimen
- Netherlands (Index Fungorum). The variety americana was described from Washington, USA. (Index Fungorum record, Psilocybe liniformans; pin = Wikidata coordinates (Q55))
- Name record
- Species Fungorum name record
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.
- 1980
Reported Psilocybin reported in var. americana (Beug & Bigwood, in Stamets et al. 1980)
- 1985
Reported Psilocybin reported; Bradshaw Table S1 assigns this species to Stijve & Kuyper's survey of more than 100 European fungi, which found psilocybin in three Psilocybe species
What the record doesn’t show: Both reports are from the 1980s and were read only through reviews and an abstract that does not name the species.
Records on file.
GBIF, the global biodiversity database, held 145 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.
Sources
- Species Fungorum name record
- GBIF species record
- GBIF occurrence counts by country
- GBIF Canadian records
- Wikidata, Netherlands (pin coordinates)
- Guzmán 1983, The Genus Psilocybe (Beih. Nova Hedwigia 74), Table 11, archive.org scan
- Stijve & Kuyper 1985, Planta Med. 51: 385-387 (abstract)
- Bradshaw et al. 2022, Appl. Environ. Microbiol. 88(24), Table S1 (literature review of Psilocybe chemistry; full text PMC9764976)
- Index Fungorum record, Psilocybe liniformans var. americana
- Index Fungorum record, Psilocybe liniformans
Compiled from the sources above; last checked .