
Psilocybin mushrooms, commonly known as magic mushrooms, are hallucinogenic fungi that have been used for hundreds or thousands of years by Indigenous groups around the world. They are often considered sacred and important for healing, divination, and spiritual rites in a number of cultures. While psilocybin was decriminalized in Oregon in 2020, it is still a controlled substance in many places due to its mind-altering effects. When ingested, psilocybin mushrooms can cause sensory, emotional, and neural changes, including severe panic attacks and extreme fear. Therefore, it is crucial to be able to identify them correctly to avoid adverse health consequences. To identify psilocybin mushrooms, one must look for certain characteristics such as cap shape and size, gill attachment and color, and blue bruising. Consulting with a local mycologist or using identification apps is also recommended to prevent misidentification.
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What You'll Learn
- Cap shape and size: Bell or cone-shaped caps, ranging from 1-10cm in diameter
- Gill attachment and colour: Thin, delicate, and cream-coloured, maturing to purple-black
- Spore prints: Place gills-down on foil, cover, and wait 6 hours. Look for dark purple to black spores
- Blue bruising: Damage to the mushroom can cause bruising due to oxidation
- Habitat: Grasslands, especially wet areas. Often found near sedges or certain grasses

Cap shape and size: Bell or cone-shaped caps, ranging from 1-10cm in diameter
When identifying psilocybin mushrooms, it is crucial to pay attention to their specific characteristics, such as their shapes, types of caps, and sizes. One distinctive feature of psilocybin mushrooms is their bell or cone-shaped caps, which can vary in size from approximately 1 to 10 cm in diameter.
The "Liberty Cap" or "Flying Saucer Mushroom," known for its large cap, is a potent variety of psilocybin mushroom. The cap of the "Liberty Cap" can range from 5-25 mm in diameter and 6-22 mm in height. It often has a sharply conical or bell shape, sometimes featuring a prominent papilla (a nipple-like structure). The "Mexican Liberty Cap," or Psilocybe mexicana, is a similar-looking variety with a slightly smaller cap of up to 1.5 cm in diameter.
Another variety, Psilocybe cyanescens, has wavy caps ranging from 15-50 mm in diameter. These mushrooms are commonly found in North America, New Zealand, Central and Western Europe, and parts of the Middle East. Their caps have a brown caramel-like colour that fades as the mushroom dries out.
Psilocybe baeocystis, commonly found in the Pacific Northwest, has a conical-shaped cap that is thin and rippled. Their caps typically range from 15-55 mm in diameter and have a dark greenish-brown hue with electric blue gills.
It is important to note that differentiating between species of magic mushrooms can be challenging, and misidentification can have serious consequences. Always study pictures of these mushrooms and notice the subtle differences in their characteristics before attempting to identify or consume any wild mushrooms.
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Gill attachment and colour: Thin, delicate, and cream-coloured, maturing to purple-black
When identifying psilocybin mushrooms, it is important to carefully examine the gills. The gills of magic mushrooms are often thin and delicate, packed tightly with spores, and located on the underside of the cap, pointing towards the stem. The colour of the gills can vary from off-white to deep brown, but they will typically darken with age, maturing to a purple-black hue due to the spores.
True Psilocybe mushrooms have gills that are typically attached directly to the stem (adnate or adnexed) and will darken as the spores mature. The gills may initially be cream-coloured or off-white, but as the mushrooms age, the spores will cause the gills to turn a darker shade, ranging from deep grey to purple-brown, with a lighter edge. This results in the characteristic purple-black hue associated with mature psilocybin mushrooms.
To confirm the presence of psilocybin, a spore print test can be performed. This involves removing the stem from a mature mushroom and placing the cap gill-side down on a piece of paper or foil. After covering and leaving undisturbed for several hours, the cap is lifted to reveal the spore print. True Psilocybe species will typically produce purple-brown to dark purple-black spore prints, while poisonous lookalikes may exhibit white, rust-brown, or lighter brown spores.
It is crucial to distinguish psilocybin mushrooms from their toxic lookalikes, as consuming the wrong variety can be dangerous. Therefore, relying solely on gill colour and attachment is not sufficient for accurate identification. Other characteristics, such as cap shape, size, and colour, as well as bruising and habitat, should also be considered when identifying psilocybin mushrooms.
Additionally, it is important to note that psilocybin mushrooms, such as Psilocybe cubensis, typically have thin, white stems and caramel to golden-brown caps. The gills of these mushrooms are usually dark purple or black when mature, and they may exhibit blue bruising when handled, similar to the gills.
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Spore prints: Place gills-down on foil, cover, and wait 6 hours. Look for dark purple to black spores
Spore prints are one of the most powerful tools you can use to identify psilocybin mushrooms and stay safe. Many toxic mushrooms closely resemble psilocybin mushrooms in shape and colour, and a spore print can reveal a completely different spore colour, signalling that the mushroom is unsafe.
To make a spore print, start by choosing a mature mushroom with a fully opened cap. Carefully remove the stem to allow the cap to sit flat. Place the cap gill-side down on a piece of foil. Cover the cap with a glass, bowl, or container to prevent drafts from disturbing the spores. Leave it undisturbed for 6–12 hours. Then, gently lift the cap to reveal the spore print left behind.
True Psilocybe species typically produce purple-brown to dark purple-black spore prints. Lookalike spore prints, on the other hand, are often rust-brown, white, or lighter brown. For example, the poisonous "Death Cap" (Amanita phalloides) has white gills and is responsible for 90% of mushroom-related deaths worldwide. Therefore, it is crucial to perform a spore print test and carefully examine the spore colour to distinguish hallucinogenic mushrooms from their toxic lookalikes.
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Blue bruising: Damage to the mushroom can cause bruising due to oxidation
While psilocybin mushrooms, or \"magic mushrooms\", are identifiable by their bell or cone-shaped caps, thin gills, and psychedelic properties when ingested, one of their key features is blue bruising. When a mushroom is damaged, its cell walls are broken, and oxygen in the air interacts with the compounds within, causing them to change colour. This process is known as oxidation.
In the case of psilocybin mushrooms, the presence of the psychotropic compound psilocybin leads to the development of a dark blue colour at the site of injury. This phenomenon is called an injury-triggered blueing reaction. It is important to note that while blue bruising is a good indicator of psychedelic mushrooms, it is not infallible as other types of mushrooms, including poisonous ones, can also display this characteristic.
To identify psilocybin mushrooms through blue bruising, one can nick the top and bottom of the cap and observe any colour change. If the mushroom bruises blue, it may be a psilocybin mushroom, but further identification methods should be used to confirm this. One such method is creating a spore print. This involves selecting a mature mushroom with a fully opened cap, removing the stem, placing it gills-down on a piece of tin foil, covering it, and letting it sit for at least six hours. The spores of psilocybin mushrooms will leave a purplish colour ranging from dark purple to almost black.
It is crucial to exercise caution and restraint when attempting to identify psilocybin mushrooms as ingesting a wild mushroom without proper identification can be deadly. Consulting with a local mycologist or using mushroom identification apps can help ensure accurate identification and prevent potential health risks. Additionally, it is important to be aware of the mental health risks associated with ingesting psychedelic mushrooms, including the potential for challenging experiences, severe panic attacks, extreme fear, and long-term adverse emotional effects.
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Habitat: Grasslands, especially wet areas. Often found near sedges or certain grasses
Psilocybin mushrooms, also known as magic mushrooms, can be found in a variety of habitats, but they are particularly associated with grasslands, especially wet areas. Some species, such as P. semilanceata, P. mexicana, and P. stuntzii, are commonly found in grasslands and meadows. P. semilanceata, for example, is widely distributed and can be found in Europe, North America, and Australia. It is often associated with sedges and certain grasses, such as Agrosiis tenuis, Poa annua, and Lolium perenne, and is known to live on decaying root remains.
Magic mushrooms tend to favour cool to warm and damp climates with high humidity. They can be found growing near bodies of water, such as streams, ponds, lakes, and creeks. In coastal areas, they may be found in dune grasses, as is the case with Psilocybe azurescens, which grows in sandy soil near dunes along the coasts of Oregon and Washington.
In addition to grasslands, magic mushrooms can also be found in wooded areas, forests, and landscaped areas. Some species, like Psilocybe caerulipes, Psilocybe cyanescens, and Psilocybe serbica, are known to thrive in deciduous and coniferous forests, especially near water. Psilocybin mushrooms are saprophytes, which means they can be classified based on their preferred substrate or growing surface. Lignicolous or wood-loving species, for example, are often found on woody debris, such as dead leaves, sticks, and bark mulch.
When identifying psilocybin mushrooms, it is important to exercise caution as many toxic and even deadly lookalikes exist in the wild. Spore prints are a powerful tool for identification as they reveal the colour of a mushroom's spores, which can help distinguish true Psilocybe species from harmful imposters. True Psilocybe species typically produce purple-brown to dark purplish-black spore prints.
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Frequently asked questions
Psilocybin mushrooms, often called "magic mushrooms", are hallucinogenic fungi that produce the psychoactive compounds psilocybin, psilocin, and sometimes baeocystin. They are considered sacred and have been used for healing, divination, and spiritual rites by Indigenous groups around the world for hundreds or thousands of years.
Psilocybin mushrooms may have caps that are shaped like bells or cones, with diameters ranging from 1 to 10 cm. The colour of the gills underneath the cap can vary from off-white to deep brown. The mushrooms themselves are typically yellow to brown, with radial grooves when moist, fading to a lighter colour as they mature.
The mind-altering effects of psilocybin mushrooms typically begin 20 to 30 minutes after ingestion and can last for up to eight hours. The effects are highly subjective, depending on the type of mushroom, its preparation, dose, and the psychological state and physical surroundings of the user. Common side effects include nausea, vomiting, muscle weakness, drowsiness, and euphoria.
It is important to exercise caution and restraint when attempting to identify psilocybin mushrooms, as ingesting wild mushrooms without proper identification can be deadly. Some key characteristics of psilocybin mushrooms include blue bruising when damaged and exposed to oxygen, and spore prints that range from dark purple to almost black. However, these characteristics are not unique to psilocybin mushrooms, so it is crucial to use multiple means of identification. Consulting a local mycologist or using identification apps can help ensure accurate identification.
In addition to the physical health risks, consuming psilocybin mushrooms can lead to adverse mental health effects. Some individuals may experience challenging experiences, including severe panic attacks, extreme fear, and flashbacks long after the initial trip. These experiences can result in depression, anxiety, psychosis, and even suicidal thoughts, a condition known as hallucinogenic persistent perceptive disorder (HPPD).

























