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Microscopy spores Psilocybe Cubensis - Burma

Psilocybe cubensis

Burma

A Southeast Asian regional cube with a famous "Mushroom John" backstory, big caramel caps and a generous, dependable dark purple-brown spore drop. A great-looking heavy depositor for the slide.

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Sold for microscopy, taxonomy and collecting only. Not for cultivation.

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The short version

Burma is a regional Psilocybe cubensis line named for Myanmar, best known for the story that mycologist John W. Allen carried it out of Southeast Asia in the 1990s. It throws large caramel-brown caps and lays down a heavy, dependable dark purple-brown print, which makes it a satisfying strain to study. The collection details are anecdotal, but the spores themselves are clean and plentiful.

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 standard Psilocybe cubensis, a regional or landrace-style line rather than a hybrid or a separate species.
It is one of the Southeast Asian cubensis lines distributed to the early online mushroom scene in the 1990s, and has been passed hand to hand ever since.
The mature wild mushroom shows broad caramel to golden-brown caps on tall white stems, with gills that darken to near-black as the spores ripen.
It is widely regarded as a generous, heavy spore depositor, which is exactly why collectors keep coming back to it for prints and slides.
As a plain cubensis it sits in normal species range for the genus. As the saying goes, a cube is a cube.

What the community says

The popular origin story credits ethnomycologist John W. Allen, often called Mushroom John, with bringing the line west after his 1990s travels in Southeast Asia.
By one telling a student handed him the sample after gathering water-buffalo dung from a rice paddy. By another the collection happened in a border village while Allen crossed the so-called Freedom Bridge to renew a visa. The accounts do not fully agree.
Locations cited range from just outside Yangon (formerly Rangoon) to somewhere on the Thailand and Burma border, so the exact spot is best treated as lore.
The story goes that Allen grew only a single flush and then propagated the spores, and that much of the Burma in circulation today traces back to that one distribution.
Vendor copy sometimes bills it as an unusually powerful cube. That is marketing rather than a documented fact, and strength in cubensis is mostly down to how a mushroom is grown.

The story

The cube that came home in Mushroom John's luggage

Burma is one of those strains whose name is also its origin myth, and like most of those stories it gets fuzzier the closer you look. The line is tied, by most accounts, to the American ethnomycologist John W. Allen, the traveller and photographer the hobby knows as Mushroom John, who spent stretches of the 1990s in Southeast Asia and is said to have named several regional cubensis lines after the places he found them. Burma, Cambodian, Thai, Hanoi, Malaysian. Whether Allen personally picked this one or was handed it is exactly the part the sources disagree on.

One version has a student passing him a sample gathered from water-buffalo dung in a rice paddy. Another has the collection happening in a border village while Allen was crossing the so-called Freedom Bridge to renew a visa. The named spot wanders from just outside Yangon, the old Rangoon, to somewhere on the Thailand and Burma border. The one detail nearly everyone repeats is that he reportedly grew a single flush and then spread the spores, which is how a mushroom from a paddy field on the far side of the world ended up on collectors' shelves everywhere. Take the geography as community lore rather than a logged GPS pin.

The version is that Burma is a regional cubensis with a good road-trip story attached. The biology is solid and well understood, the precise where-and-when is anecdote.

Why it earns its keep in the lab

What is not in dispute is how it behaves as a specimen. Burma is reputed a generous, heavy spore depositor, throwing big caramel-brown caps that ripen plenty of dark, easy-to-find spores. For anyone building a reference collection or just wanting a print that actually prints, that reliability is the real appeal. It is a plain Psilocybe cubensis, no hybrid, no exotic cross, and that ordinariness is a feature: clean, textbook spores in dependable quantity.

The species

Meet Psilocybe cubensis

Burma 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: Burma, 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.

Caramel cap

Broad and smooth, golden to caramel-brown and often described with a faint metallic sheen, conic or bell-shaped when young and flattening with age, sometimes to a wavy margin. Frequently on the larger side for the species.

Tall white stem

White to off-white, sturdy and fibrous, carrying a leftover partial veil that dries to a persistent ring (annulus) usually dusted purple-brown by falling spores.

Darkening gills

Crowded and pale grey when young, deepening toward near-black as the spores mature. The ripe gill face is what gives Burma its reputation as a heavy depositor.

Blue bruising

Handle or nick the flesh and it bruises blue-green, the usual Psilocybe enzyme reaction, psilocybin converting to psilocin and oxidising to blue pigments. A normal field mark, not a strain quirk.

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: Burma (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

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.

Treat it as well-travelled community lore rather than documented history. Allen is genuinely credited with naming several Southeast Asian cubensis lines in the 1990s, but the specifics for Burma vary between sources, from a student's gift near Yangon to a border-village find near the Freedom Bridge. The mushroom is real and well understood; the exact collection details are anecdote.

No. The base Burma is a normal, fully pigmented cubensis with a standard dark purple-brown spore print. There are separate spin-off lines sold as Albino Burma and Leucistic Burma, which are low-pigment derivatives and a different thing. This is the ordinary dark-spored Burma.

Smooth, thick-walled, oval to subellipsoid spores, pale amber individually 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. Burma's generous drop usually means a sample-rich print to work from.

If you want something that keeps for years on a shelf, take the print, and Burma's heavy deposit makes for a good one. If you want to be at the microscope tonight, take the syringe. The vial and swab sit in between on convenience.

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.

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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.