Home / Magic Mushroom Spores / Psilocybe Cubensis / Psylocybe Fanaticus
Psilocybe cubensis
Psylocybe Fanaticus
The cube that shipped alongside PF Tek, the home method that got a whole generation started. Named for the man behind it, it drops a clean, heavy purple-brown print that is a pleasure to study under the scope.
★★★★★ 5.0 · 13 reviewsChoose your format
Some formats are out of stock
Want to know the moment it returns?
Sold for microscopy, taxonomy and collecting only. Not for cultivation.
filled under laminar flow
plain packaging, tracked
The short version
PF Classic is the original house line of Psylocybe Fanaticus, the alias of the late Robert "Billy" McPherson, and it circulated alongside the famous PF Tek he published in the early 1990s. It is a plain, unusually well documented Psilocybe cubensis: golden-brown caps, a sturdy ringed stem, and a dependable dark purple-brown spore print. It is not the lighter "redspore" line, which was a separate mutation. A genuine piece of hobby history under glass.
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 was distributed by Robert 'Billy' McPherson under the alias Psylocybe Fanaticus, the deliberate misspelling he reportedly kept once the name had stuck.
- It dates to the early 1990s and circulated alongside McPherson's PF Tek, the brown-rice-flour-and-vermiculite method that became one of the most widely copied home-cultivation guides ever published.
- Genetically it is a plain Psilocybe cubensis. Not a hybrid and not a separate species.
- It drops a clean, heavy, dark purplish-brown spore print and is regarded as a reliable depositor, which is one reason it spread so widely.
- By most accounts it is a notably late depositor, releasing spores only once the cap has fully opened, so a heavy print tends to come from a mature specimen rather than a young one.
- It is NOT the PF Redspore: that pale rusty-spored line was a separate mutation reportedly seen in McPherson's lab around 1996, not PF Classic itself.
What the community says
- The 'PF' is said to stand for Psilocybe Fanaticus, McPherson's chosen handle, though he wrote it 'Psylocybe' with a y and the story goes he simply never corrected it.
- It is often called the original beginner's strain, reportedly selected to behave predictably alongside the PF Tek, which is said to be where the 'Classic' tag came from.
- Community lore credits PF Classic with helping kick off the mail-order spore-syringe scene of the 1990s, for better and worse given how that story ended in court.
- Some sellers blur PF Classic together with the redspore variant or with later 'PF' rebrands. By most accounts the dark-spored Classic is the original line and the others are offshoots.
The story
The strain with a paper trail
Most cubensis lines arrive with a fog of rumour and no documents. PF Classic is the rare exception, because the man behind it left a record you can actually follow. By most accounts the line traces to Robert "Billy" McPherson, who traded under the deliberately misspelled name Psylocybe Fanaticus and, in the early 1990s, published the PF Tek, the brown-rice-flour and vermiculite method that went on to be copied, printed and passed around more times than anyone could reasonably count.
PF Classic was the line that circulated alongside that method, and the pairing of a famous technique with a famous name is, the story goes, a large part of why it spread so far. It became, for many people, the first cube they ever read about.
PF Classic is one of the few cubensis strains whose origin you can name, date and footnote rather than guess at. The history is the appeal as much as the mushroom is.
How the story actually ended
The part of the legend is also the sad part. McPherson was raided in 2003, and his collection of cubensis genotypes was, by most accounts, seized and destroyed in the process. He later died in 2011. What survived him was the technique and the line that carried his alias out into the world, both of which long outlasted the man. Treat the courtroom and biographical details as the documented record they are, and the rest, the "Classic" branding and the beginner-strain framing, as the community lore it has become. One thing worth keeping straight: PF Classic is the dark-spored original, while the pale, rusty-spored oddity people remember is the separate PF Redspore, reportedly a mutation that turned up around 1996. The two get muddled constantly. If your print is a clean purple-brown, you have the Classic.
The species
Meet Psilocybe cubensis
Psylocybe Fanaticus 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
- Psylocybe Fanaticus, 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-brown cap
Roughly 2 to 8 cm across, bell-shaped to conical when young and opening out convex to flat with age. Light brown to golden, sometimes carrying small pale veil flecks across the surface.
Thick ringed stem
White to pale yellow, sturdy and fibrous, and on the longer side. A leftover partial veil typically leaves a persistent annulus (ring) near the top, often dusted dark with caught spores.
Darkening gills
Crowded and pale when young, deepening to dark brown and finally purplish-black as the spores ripen. A dependably dark depositor, which is exactly the trait collectors prize.
Blue bruising
Handled flesh bruises blue-green where psilocin oxidises into blue pigments. Standard Psilocybe behaviour and nothing strain-specific, but a clean identity check.
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
- Psylocybe Fanaticus (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.
It is said to stand for Psilocybe Fanaticus, the handle Robert 'Billy' McPherson traded under. He actually spelled it 'Psylocybe' with a y, and the story goes he kept the misspelling once the name had stuck. The 'Classic' part is later branding for the original dark-spored line.
No, and they get confused often. PF Classic is the standard dark purple-brown spored cubensis. The redspore was a separate, pale rusty-spored mutation reportedly seen in McPherson's lab around 1996. If your print is a clean purple-brown, you have the Classic.
Smooth, subellipsoid, thick-walled spores, pale amber individually and dark purplish-brown in a mass, each with a small germ pore at one end, sitting on four-spored basidia. Find them at 100x, study at 400x, and get the wall sharp at 1000x under oil.
If you want something that keeps for years on a shelf, take the print. 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) suits syringes and vials; prints keep happily in a sealed bag somewhere cool. Stored well, a print stays viable for study for years.
What customers say
Reviews
Excellent company
Great product great price
Excellent service
worked perfectly
Excellent service
Great
Ask the community
Questions and answers
No questions yet. Yours could be the first.
For microscopy, taxonomy and collecting only.Sold for legal research. Not for cultivation. Spores contain no controlled substances. We trust you to be responsible.