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Psilocybe cubensis
Pink Buffalo
A Thai island cube with a buffalo for a namesake and a contested origin. Reddish-gold caps, fast blue bruising, and a clean dark purple-brown print that drops well for the slide.
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Sold for microscopy, taxonomy and collecting only. Not for cultivation.
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The short version
Pink Buffalo is a Thai Psilocybe cubensis traced to the island of Koh Samui, usually credited to ethnomycologist John W. Allen in the late 1990s, though a rival account names Milo Zverino around 2000. The mushroom is not actually pink: the name honours a rare pink-hued water buffalo said to graze where it was found. Reddish-gold caps, quick blue bruising, and a dependable dark purple-brown print make it a handsome collector's cube.
Straight talk
Fact vs. legend
There is a lot of folklore around this strain. Here is which bits are real, side by side.
What we actually know
- It is a Thai line of Psilocybe cubensis tied to the island of Koh Samui in southern Thailand. Not a hybrid, not a separate species.
- It is most often credited to the American ethnomycologist John W. Allen, known online as Mushroom John, who is said to have collected it in the late 1990s.
- The mushroom itself is not pink. The name refers to a rare pink-hued water buffalo reportedly seen near the rice paddies where it was found.
- It throws reddish-gold to caramel caps, bruises blue-green readily, and drops a standard dark purple-brown cubensis print that deposits well for study.
What the community says
- The story goes that John Allen found it after following buffalo tracks and dung through rice paddies near Phang Ka beach on Koh Samui.
- A competing account, reportedly relayed by Allen himself on the forums, credits mycologist Milo Zverino with collecting the line from Ban Saket, Thailand around the year 2000.
- One telling has the strain named for a sacred Koh Samui plant called the buffalo carnation, but nobody has been able to turn up such a flower.
- Allen has reportedly pushed back on the romance, noting the pink buffalo was nothing sacred and that perhaps one in ten Thai water buffalo simply carry a pinkish hue.
- It often gets sold as a specially potent Asian line, but a cube is a cube and strain-to-strain strength claims are largely overstated.
The story
A buffalo, a rice paddy, and two men who both claim the find
Pink Buffalo is one of the better travel stories in the cubensis world, and like most good travel stories it gets retold a few different ways. The thread everyone agrees on is the setting: the island of Koh Samui, off the southern coast of Thailand, where this dung-loving cube turns up in the warm, wet rice paddies. The usual credit goes to John W. Allen, the American ethnomycologist better known online as Mushroom John, who is said to have collected it in the late 1990s while wandering through Thailand, Cambodia and Burma.
By most accounts Allen spotted a lone pink-hued water buffalo grazing near the paddies, went to have a look, and found the mushrooms growing in the dung along its tracks. He reportedly named the line for that animal. He has also, by some tellings, been keen to deflate the mysticism around it, pointing out that the buffalo was nothing sacred and that roughly one in ten Thai water buffalo carry that pinkish tint anyway. So the mushroom is not pink, and never was. The buffalo was.
The version is that the find has two fathers. Allen gets most of the credit, but a rival account, reportedly passed on by Allen himself, hands it to Milo Zverino around 2000.
Fact, fiction, and a flower nobody can find
That second account names mycologist Milo Zverino as the collector, gathering the line from Ban Saket, Thailand around the year 2000. A third, vaguer telling claims the name comes from a sacred Koh Samui plant called the buffalo carnation, except no one has managed to turn up a flower by that name. Treat the dates, the names and the route through the paddies as community lore rather than settled history. What is not in doubt is that this is a plain, good-looking Thai Psilocybe cubensis that has been passed around collectors for two decades.
The species
Meet Psilocybe cubensis
Pink Buffalo is a collector’s line of a single, well-travelled species. Psilocybe cubensis was first written up in 1906 by the American mycologist Franklin Sumner Earle, from a specimen found in a cattle field in Cuba, which is where the name comes from. He originally called it Stropharia cubensis; Rolf Singer moved it into the genus Psilocybe in 1948.
The genus name is a tidy bit of Greek: psilos (“bare”) plus kubē (“head”), for the smooth, peelable skin of the cap, so the full name reads roughly as “the bare-headed mushroom from Cuba.”
- Family
- Hymenogastraceae (older books say Strophariaceae)
- Genus
- Psilocybe (Fr.) P. Kumm., 1871
- Species
- Psilocybe cubensis (Earle) Singer, 1948
- Basionym
- Stropharia cubensis Earle, 1906
- This product
- Pink Buffalo, a collector’s cultivar of the species
- Type locality
- Cuba (where it was first named)
How you’d know it
Field marks
These describe the mature mushroom for reference and identification.
Reddish-gold cap
Medium to large, starting cinnamon-brown and warming to a reddish, golden-caramel as it opens, often paler amber toward the rim. Convex when young, flattening with a low central bump in many specimens.
Tall white stem
White to cream and on the sturdy side, frequently long, with mature wild fruitbodies reported well over 15 cm. A leftover partial veil leaves a ring (annulus) on the upper stipe.
Darkening gills
Crowded and pale grey-brown when young, deepening toward purple-black as the spores ripen. The ring usually ends up dusted purple-brown from the drop.
Fast blue bruising
Handle the flesh and it bruises blue-green quickly, an enzyme converting psilocybin to psilocin, which oxidises into blue pigments. Classic Psilocybe, and Pink Buffalo is said to show it readily.
Where it comes from
A dung-lover with a wanderer’s history
Psilocybe cubensis is coprophilic, a fancy word for dung-loving. In the wild it lives on the droppings of big grazing animals, classically cattle and water buffalo, fruiting from warm, humid pasture. It does not grow on wood and it does not partner with tree roots.
You’ll find it across the warm parts of the world: the Gulf Coast of the United States, Mexico, Central and South America, Southeast Asia and Australia. It was named from Cuba, but where the lineage truly began is an open question. A 2026 study describing its closest wild relative in southern Africa suggests the deep roots are Old-World, the mushroom having apparently travelled with grazing herds long before anyone gave it a Latin name.
The main event
Under the microscope
This is what you actually bought the spores for. Put a print or a drop from a syringe on a slide and here’s what shows up.
- Shape & size. Smooth, thick-walled and subellipsoid, like a slightly squashed rugby ball, roughly 11.5–17 µm long by 8–11 µm wide (the figures Paul Stamets settled on).
- The germ pore. Look for a single pale, flattened dot at one end. That’s the one thin spot in the wall where, in nature, a mushroom would begin, and a real cubensis hallmark.
- Pale alone, dark in a crowd. A single spore looks honey-amber with the light behind it; only in a mass do they read deep purple-brown to black. So a near-black print but pale spores on the slide is normal optics, not a dud.
- What you’ll need. Find the field at 100×, study shape and the germ pore at 400×, and get the wall crisp at 1000× under oil. A touch of methylene blue or KOH lifts the contrast.
- The legal bit, and why it’s true. A dormant spore carries no psilocybin or psilocin at all; that chemistry only appears later in living tissue. That is exactly why the spores are legal to own and study in the UK.
Choose your format
Print, syringe, vial or swab?
Same lab-grade genetics in every option. The honest difference is shelf life versus how soon you’re at the scope.
Spore print
Keeps longest
Spores dropped straight onto sterile foil. Stored cool and dry it outlasts everything else here, so it’s the one to reach for if you’re building a collection to keep for years.
Spore syringe
Ready tonight
Spores suspended in sterile water, ready to go straight onto a slide. The quickest way to be looking down the microscope this evening. Comes in 3 mL and 12 mL.
Vial & swab
Compact
A sealed glass vial is a tidy middle ground; a sterile swab is the most travel-friendly, robust little format for adding a strain to your reference set.
At a glance
The spec sheet
- Species
- Psilocybe cubensis
- Strain
- Pink Buffalo (collector’s cultivar)
- Spore print
- Dark purple-brown to near-black, heavy depositor
- Spore shape
- Subellipsoid, smooth, thick-walled, with a germ pore
- Spore size
- ~11.5–17 × 8–11 µm
- Basidia
- Mostly 4-spored, ~20–30 × 7–10 µm
- Wild habitat
- Coprophilic, on herbivore dung & warm pasture
- Climate
- Subtropical to tropical
- Intended use
- Microscopy, research & collecting only
Dig deeper
Further reading
Independent, non-commercial sources, no shops, just good information.
- Psilocybe cubensis on Wikipedia: the species overview.
- The genus Psilocybe: taxonomy and the family reshuffle.
- Index Fungorum: the formal nomenclature record.
- Proc. Royal Society B (2026): the African wild-relative study.
Common questions
Frequently asked
Yes, for microscopy and research. A dormant spore contains no psilocybin or psilocin, so the spores themselves are not a controlled substance in the UK. We sell them strictly for microscopy, taxonomy and collecting, never for cultivation.
No. The flesh is reddish-gold to caramel-brown, like most warm-climate cubes. The name honours a rare pink-hued water buffalo reportedly seen grazing near the rice paddies on Koh Samui where the line was collected, not the colour of the mushroom or its spores.
It is contested. Most accounts credit ethnomycologist John W. Allen in the late 1990s, but a rival story, reportedly relayed by Allen himself, names Milo Zverino collecting from Ban Saket, Thailand around 2000. We treat the precise who, where and when as community lore rather than documented fact.
Smooth, thick-walled, subellipsoid spores, pale amber on their own and dark purple-brown in a mass, each with a small flattened germ pore at one end. Find them at 100x, study at 400x, and get the wall sharp at 1000x under oil. Sizes sit in the usual cubensis range, roughly 11.5 to 17 by 8 to 11 micrometres.
Yes. Pink Buffalo gives a standard heavy cubensis deposit, purple-brown to near-black, so prints and the other formats all carry plenty of material to work with. Nothing pale or sparse here, unlike the albino and Penis Envy lines.
Cool, dark and dry. A fridge (not freezer) is ideal for syringes and vials; prints keep happily in a sealed bag somewhere cool. Kept well, a print stays viable for study for years.
What customers say
Reviews
Big thumbs up.
Good clean spores recommended
All good. Arrived pretty quick. Really nicely packaged. Doing well so far (under the microscope)
These spores looked really large once i looked at them under the microscope 👍
Excellent results! Thank 5/5
🤩
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Questions and answers
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For microscopy, taxonomy and collecting only.Sold for legal research. Not for cultivation. Spores contain no controlled substances. We trust you to be responsible.