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Psilocybe cubensis
Full Moon Party
A wild Thai isolate with a party name and a serious spore habit. Said to come off Phuket elephant dung, and it drops one of the heaviest, easiest prints in the cubensis world.
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Sold for microscopy, taxonomy and collecting only. Not for cultivation.
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The short version
Full Moon Party is a wild Thai Psilocybe cubensis said to have been collected off elephant dung in Phuket around 2019 and named for the famous Koh Phangan beach party. It is not a lab hybrid by the usual telling, just a wild isolate. Collectors love it for one reason above all: a famously heavy, easy spore drop that fills a slide fast.
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 plain Psilocybe cubensis. By the common telling it is a wild isolate from Thailand, not a hybrid and not a separate species.
- It is a relatively recent line, with the origin story circulating from around 2019 onward rather than the 1990s vendor era.
- Its standout trait for collectors is spore output: it deposits a heavy, dark print very readily, the opposite of a stingy strain like Penis Envy.
- Visually it is a textbook tropical cube: golden to caramel caps, robust pale stems, gills that ripen from grey to purple-black, and blue bruising where handled.
What the community says
- The widely repeated story credits a citizen scientist known only as MycoCowboy, who is said to have collected it off elephant dung in Phuket, Thailand and shared it with the community around the 19th of July 2019. The original account has reportedly since vanished, so treat the details as community lore.
- It is often described as an isolate pulled from a broader wild collection that also circulates as Thai Elephant Dung. The two names are said to trace back to the same find.
- The name apparently nods to the legendary Full Moon Party on Koh Phangan, even though the collection site is usually given as Phuket, a different part of the country. The name is atmosphere, not a map reference.
- A minority of sellers describe it instead as a Koh Samui hybrid crossed with Golden Teacher and Penis Envy lines. That contradicts the more common wild-isolate account, and neither version is independently documented.
The story
A wild Thai cube with a beach-party name
Of all the modern cubensis lines, Full Moon Party has one of the more charming origin stories, and unusually for a vendor name it is at least fairly consistent from source to source. By most accounts the trail starts in Thailand around 2019 with a citizen scientist remembered only as MycoCowboy, who is said to have collected the mushroom off elephant dung in Phuket and shared spore material with the wider community on or around the 19th of July that year. The original account has reportedly since disappeared, which is a familiar shape for these stories, so it is fairest to file the specifics under community lore rather than documented history.
What makes it interesting taxonomically is what it is not. The common telling is that Full Moon Party is a wild isolate, a single clean selection pulled out of a natural Thai collection, rather than a lab cross of several named strains. The same find apparently also circulates under the plainer label Thai Elephant Dung, and the two names are usually treated as siblings from the one collection. Wild tropical cubes off dung have a long history of being noticed by travellers, and ethnomycologist John Allen documented similar Thai dung-grown lines decades earlier, so a fresh wild isolate from the region is an entirely believable thing.
The name is pure holiday postcard. The Full Moon Party is the famous all-night beach rave on Koh Phangan, which is not even where the mushroom was reportedly found. The name is vibe, not a grid reference.
One contradiction worth knowing
Not everyone tells it the same way. A smaller number of sellers describe Full Moon Party instead as a Koh Samui hybrid crossed with Golden Teacher and Penis Envy genetics, which flatly contradicts the wild-isolate version. Neither account comes with paperwork you could check, so we treat them as competing stories. For a collector it barely matters: whatever its parentage, on the slide it behaves like a healthy, generous Psilocybe cubensis, and that generosity is the whole point of owning it.
The species
Meet Psilocybe cubensis
Full Moon Party 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
- Full Moon Party, 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.
Golden to caramel cap
Reportedly medium to large, roughly 2 to 5 cm across, opening from convex to flat with maturity. Light golden in the warmth, deeper caramel-brown when cool, often paler toward the rim, and a touch sticky to the touch when damp.
Robust pale stem
White to off-white and fairly thick, commonly cited at around 6 to 12 cm tall. A torn partial veil tends to leave a ring (annulus) on the upper stem, usually dusted purple-brown once the spores rain down on it.
Fast-darkening gills
Crowded and pale grey when young, ripening to a deep purplish-black as the spores mature. This line is known for the caps darkening quickly once the veil breaks, simply because of how much spore it carries.
Blue bruising
Handle the flesh and the stem and cap bruise blue-green, the classic Psilocybe reaction where the enzyme work turns psilocybin into psilocin, which oxidises into blue pigments. A normal field mark for the wild mushroom.
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.
- Expect a generous sample. This line is known as an unusually heavy spore depositor, so prints tend to be dense and dark, and a syringe will usually give you a busy field of view. If anything, a fresh print can be so loaded that a light touch when loading the slide reads more clearly than a heavy scrape.
- 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
- Full Moon Party (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.
The common story is that it is a wild isolate collected off elephant dung in Thailand around 2019, not a lab cross. A minority of sellers instead call it a Koh Samui hybrid of Golden Teacher and Penis Envy. Neither version is independently documented, so we present both and lean on the more widely repeated wild-isolate account. Either way it is a plain Psilocybe cubensis.
The name nods to the famous all-night Full Moon Party beach event on Koh Phangan, which is a different part of Thailand from the usual collection site at Phuket. By all accounts it is an atmospheric name rather than a literal record of where it was found.
Smooth, oval (subellipsoid), thick-walled spores, pale amber when viewed alone and dark purple-brown to black in a mass, each with a small flattened germ pore at one end. Find them at 100x, study them at 400x, and get the wall sharp at 1000x under oil immersion. This line tends to give a busy, well-populated field thanks to its heavy drop.
It has a reputation as one of the easiest cubes to get a sample from, because it deposits a heavy, dark print readily. That makes it a forgiving choice if you are still learning to load a slide, unlike the famously sparse Penis Envy types. Stored cool, dark and dry, a print stays viable for study for years.
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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.