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Psilocybe cubensis
Australian Gold Cap
An Aussie pasture classic: golden caps the colour that gave the whole country its slang for these mushrooms, plus a heavy dark purple-brown print that makes it a satisfying line to study.
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Sold for microscopy, taxonomy and collecting only. Not for cultivation.
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The short version
Australian Gold Cap is the "Aussie" line of Psilocybe cubensis, the golden-topped dung mushroom so common down under that "gold top" became the national slang. It is reportedly a wild collection from southern Australian pastures, traded in the local scene for decades before reaching overseas vendors. A plain, well-pigmented cubensis with a heavy, dark purple-brown print and clean, textbook spores.
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
- Australian Gold Cap is a plain Psilocybe cubensis. Not a hybrid, not a separate species, and not low-pigment.
- In Australia, gold top, golden top and gold cap are everyday common names for wild P. cubensis itself, which is where this line's name comes from.
- P. cubensis is not native to Australia. By most accounts it arrived with imported cattle (around 1,800 head were on the mainland by 1803) and now grows wild from northern Queensland down to southern New South Wales.
- Like other healthy pigmented cubes it drops a heavy, dark purple-brown spore print and shows the classic blue bruising of the species when the flesh is handled.
What the community says
- The line is said to have been isolated from a single wild fruit somewhere in southern Australia, but no collector, place or date is documented. Treat that as community lore.
- It is described as having been passed around the Australian spore-trading scene for decades before it apparently slipped across borders to overseas vendors fairly recently.
- Vendor blurbs love to call it a high-potency, tough, mold-resistant Aussie. Remember a cube is a cube, and strength claims like that are largely cultivation talk rather than anything about the spores.
- Because it shares the Australian-pasture origin story, it sometimes gets lumped in with other Aussie lines like Blue Meanies or Wollongong. They are separate community names, not the same isolate.
The story
The mushroom that named itself
In Australia you do not say Psilocybe cubensis at the pub. You say gold top, and everyone knows exactly what you mean. The golden-brown cap is so much a part of the local landscape that the colour became the name, and "Australian Gold Cap" is really just that same slang dressed up as a strain. So the first thing to say is that the name describes a look, not a documented pedigree.
The species itself is a relative newcomer to the continent. By most accounts it is not native at all, and rode in with the cattle that colonial shippers landed from the late 1700s onward. Give a dung-loving, warm-climate fungus that many fresh paddocks of cow pats and it does what it does best, and within a couple of centuries gold tops were a fixture of Queensland and New South Wales pasture from late spring into autumn.
As a named collector's line the history is thin: it is said to come from a wild southern-Australian fruit, but no name, no paddock and no date survive. Take the origin as folklore.
From the paddock to the slide
What you can say plainly is what it is under the lens. This is a fully pigmented, ordinary cubensis, the kind that gives a generous dark purple-brown print and clean, thick-walled, subellipsoid spores with the usual flattened germ pore at one end. There is no albino or leucistic twist here, no famous quirk, just a good-looking pasture cube with a great Aussie nickname and a habit of catching its own falling spores on a persistent white ring.
The species
Meet Psilocybe cubensis
Australian Gold Cap 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
- Australian Gold Cap, 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 cap
Broad and smooth, reddish cinnamon when young and lightening to a warm golden brown with age, usually a touch darker at the centre and paler toward a whitish rim. Convex at first, flattening out with a low central bump as it matures.
Tall pale stem
White to pale yellow, thick and fibrous, often quite tall to carry the large cap. A leftover partial veil leaves a persistent white ring (annulus) part way up.
Spore-dusted ring and darkening gills
Gills start pale grey and ripen through purple-grey to near-black. The white ring usually ends up dusted purple-brown, because falling spores settle straight onto it.
Blue bruising
Handle the stem, ring or flesh and it bruises blue-green, the classic Psilocybe reaction as enzymes convert psilocybin to psilocin, which then oxidises to blue pigments.
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
- Australian Gold Cap (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.
Genetically it is a plain Psilocybe cubensis. Gold top, golden top and gold cap are simply the Australian common names for the wild species, and this line is the pasture-collected version of it. No hybrid, no albino trait, nothing exotic, just a good-looking pigmented cube with a great nickname.
The species is thought to have arrived in Australia with imported cattle and now grows wild from northern Queensland to southern New South Wales. The named collector's line is said to have come from a single wild southern-Australian fruit, but no collector, place or date is documented, so treat the specifics as community lore.
Smooth, subellipsoid, thick-walled 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.
Yes. This is a fully pigmented cube, so it deposits a heavy, dark purple-brown print, which is exactly what makes it a satisfying line for print collectors and easy to work from at the microscope.
If you want something that keeps for years on a shelf, take the print. If you want to be at the microscope sooner, take the syringe. The vial and swab sit in between on convenience.
What customers say
Reviews
Great quality, rich in spores and well wrapped
Well packaged and they gave me an extra spore syringe so I’ve now got four strains to explore :)
Came very well packed, secure and clean
Brilliant packaging and clearly labelled.
Product arrives in an extremely professional format, and always is a great product.
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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.