Do magic mushrooms grow in Ontario? What the records show

Do magic mushrooms grow in Ontario? Public records say some psilocybin-containing fungi have been found in the province, but not the ones the name suggests. Herbarium specimens and community observations in the GBIF database place a handful of species in Ontario. Laboratory studies of some of these species, mostly on material not stated to be from Ontario, found psilocybin.

This is a natural-history article, not a field guide. It does not say how to recognize any species, where to find one, or whether any mushroom is safe to eat. It reports what the records and studies show, and where they run out. We left out locality details on purpose.

What do the records actually show for Ontario?

We queried GBIF, the open biodiversity database, on 4 October 2026. Its Ontario records come from museum and government herbaria, including the Royal Ontario Museum fungarium and the Canadian National Mycological Herbarium (Agriculture and Agri-Food Canada), from herbaria elsewhere that hold Ontario collections, and from community platforms such as iNaturalist and Mushroom Observer.

Across Canada, GBIF holds 893 records under the genus Psilocybe and 500 under Panaeolus. Ontario has 117 of the Psilocybe records, about 13%, and 136 of the Panaeolus records. Of the 117 Psilocybe records, 92 are preserved specimens (81 collected before 1990) and 25 are community observations. Some records lack a province, so provincial totals are lower bounds.

Psilocybe in Ontario

Psilocybe caerulipes is the clearest case. It has been recorded in Ontario since 1947 and was still being posted in 2026. The 22 records include 5 herbarium specimens and 17 community observations. A 2022 laboratory study reported relatively high psilocybin levels in two collections (Gotvaldová et al., 2022). Those collections were not stated to be from Ontario, and nobody can say what Ontario material would contain.

The headline species are close to absent. The one P. cyanescens record is a 2020 observation, and 152 of the 159 Canadian records are in British Columbia. A 2022 paper calls P. cyanescens well known on the US Pacific Coast and not native to Europe, where it was introduced in the 20th century (Gotvaldová et al., 2022). The records alone cannot say whether the Ontario observation is a native population, an introduction or a misidentification. GBIF holds no Ontario-labelled records of P. semilanceata.

Panaeolus in Ontario

The 25 records under P. cinctulus and P. subbalteatus may largely describe one group of fungi under two names. All 14 P. cinctulus records date from 2020 on, and most P. subbalteatus records are older herbarium specimens (GBIF). That split probably reflects which name was in use when each record was identified, though the records alone cannot prove it.

The most-recorded Panaeolus in Ontario, P. papilionaceus, has had negative results in the few samples tested. Two or three fruiting bodies cannot speak for a whole species, and the tested samples were not stated to be from Canada. It is a reason for caution about names, not a verdict on Ontario material. GBIF returns no Canadian records under Panaeolus cyanescens.

Is Psilocybe the only genus involved?

No. A 2024 genome study found that psilocybin biosynthesis began in Psilocybe and later turned up in other, unrelated genera, including Panaeolus, Gymnopilus, Pluteus and Pholiotina (Bradshaw et al., 2024). GBIF has Ontario records for some of them: Pluteus salicinus (35 records, 1921 to 2013), Pluteus americanus (32, all observations from 2013 to 2025), Gymnopilus luteofolius (16) and Pholiotina cyanopus (7).

Laboratory work reports psilocybin in collections of Pluteus salicinus, Pluteus americanus and Pholiotina cyanopus (Gotvaldová et al., 2022), and the genome study found the psilocybin genes in Gymnopilus luteofolius and Pluteus salicinus (Bradshaw et al., 2024). The tested material was not stated to be Ontario material. The point is narrower than it sounds: what people call magic mushrooms is not one tidy group, which is one reason the common name misleads.

What has been recorded in other provinces?

British Columbia holds 498 of the 893 Canadian Psilocybe records, just over half. Quebec has 96, New Brunswick 44, Nova Scotia 34, Newfoundland and Labrador 17, Manitoba 10, Prince Edward Island 7, and Alberta, the Northwest Territories and the Yukon one each. Panaeolus is more evenly spread: Ontario 136, British Columbia 134, Alberta 75, Manitoba 31, Quebec 43, Nova Scotia 25 and Saskatchewan 11, among others.

Read this as where names were recorded, not how common anything is. A province with more records may simply have more collectors, more herbarium effort or more people posting observations. The pattern is still informative: the West Coast species cluster in British Columbia, while Psilocybe caerulipes, among records that name a province, appears only in Ontario, Quebec and the Atlantic provinces.

What can’t the records tell us?

A lot. Treat every number above as a lead, not a conclusion.

• Names are not chemistry. A genus name does not mean psilocybin. In the Pacific Northwest, only seven of twenty tested species from seven genera contained it (Beug and Bigwood, 1982). The 2024 genome study found that 14 of 71 specimens labelled Psilocybe were actually Deconica, a different genus, and it describes P. fuscofulva as non-producing (Bradshaw et al., 2024).
• Labels are often wrong. A 2022 DNA study reported widespread misidentification in museum collections and public databases, making even names unreliable (Bradshaw et al., 2022). The 2024 study re-examined one specimen labelled Psilocybe quebecensis and redetermined it as P. caerulipes (Bradshaw et al., 2024). We trace that name and its records in our Psilocybe quebecensis history.
• Old records are not current records. 81 of the 117 Ontario Psilocybe records were collected before 1990 (GBIF). They show that a name was recorded once, not that anything still grows there.
• Recent records follow the observers. Community platforms reflect where people look and what they post. A jump in recent records can mean more observers, not more mushrooms.
• A record is not always a wild mushroom. Besides the 1982 P. cubensis culture, a 1988 P. australiana record notes a greenhouse. GBIF records do not reliably separate native, introduced and cultivated material.
• Counts can double-count. Duplicate specimens of one collection can sit in several herbaria, and only 58 of the 117 Ontario Psilocybe records carry coordinates (GBIF).
• Nothing here measures strength. We found no published chemical analysis of Ontario-collected material in the sources we searched. Levels vary widely even within one species: a 2022 survey calls tryptamine concentrations extremely variable (Gotvaldová et al., 2022).
• Taxonomy keeps moving. The same fungus can appear under two names, as with P. cinctulus and P. subbalteatus, and the same name can cover different fungi. GBIF follows one naming system; the papers cited here follow others.

Better evidence would be expert-checked specimens deposited in a public herbarium, confirmed by DNA barcoding, with chemical analysis alongside. The 2022 DNA study shows how: it barcoded fungarium specimens before measuring them (Bradshaw et al., 2022). We did not find such a study for Ontario. If one exists, it would change this article.

Why can’t an article tell you what you found?

Because the experts struggle too. If museum labels are often wrong, a photo or a description is a weaker guide. Psilocybin content also swings widely between collections of one species, by more than a factor of seven in one Pacific Northwest study (Beug and Bigwood, 1982), and colour tells you little about it (why bluing is no test).

Poisonous and non-poisonous mushrooms are a different question, and the Ontario Poison Centre says only a mycologist can tell them apart (Ontario Poison Centre). Do not use this article, a photo app or a search result to decide whether to eat a wild mushroom. Our safety page has the essentials, and the callout near the top has the Poison Centre number.

What does Canadian law say?

Health Canada states that the production, sale and possession of magic mushrooms are illegal in Canada under the Controlled Drugs and Substances Act unless authorized by Health Canada (Health Canada). That is the government’s general statement, not legal advice, and this article does not say what applies to any particular situation; for background, see how magic mushrooms became illegal in Canada.

Shroomverse sells mushroom products. This article is general information about mushroom chemistry and natural history. It is not medical, legal or identification advice, and it does not recommend any product.