Species, strain, variety and isolate
Four words get mixed up on spore labels. They mean different things.
- Species is the biological unit. Psilocybe cubensis is one species. Panaeolus cyanescens is another, in a different genus.
- Strain is a named line within a species, kept going by hobbyists and vendors. Golden Teacher and Penis Envy are both P. cubensis. A strain in this hobby is a convention, not a formal taxonomic rank.
- Variety is used loosely as a synonym for strain, and more precisely for a visible form such as albino or leucistic within a strain.
- Isolate is a single genetic individual selected from a strain, usually on an agar plate, and given its own code. See isolated vs multispore syringes.
How cubensis strain names arise
There is no registry. A name sticks because enough people use it. Names come from four places.
- Collection site. Mexican and Hillbilly are named for where the original wild specimen was reportedly found.
- Breeder. B+, Jedi Mind Fuck and Tidal Wave were named by the people who selected or crossed them.
- Mutation. Albino Penis Envy and Enigma are named for a change that appeared in an existing line.
- Appearance. Golden Teacher, Jack Frost, Ghost and Blue Meanie describe what the mushroom looks like.
Because there is no registry, the same name can cover different genetics at different vendors. The histories below are the commonly told versions. Treat them as hobby lore rather than record.
The main cubensis families
Golden Teacher
The reference strain. Golden Teacher appeared in the 1980s and is named for its golden-brown cap. Its origin is disputed. Under the microscope it shows typical cubensis spores: dark purple-brown, smooth and roughly elliptical. Most beginners start here because every other strain gets compared to it.
B+
B+ dates from the 1990s and is credited to a Florida breeder. For years there was argument about whether it was pure cubensis or a cross with another species. The consensus now is cubensis. Large caramel caps and dark prints.
Penis Envy and its lines
Penis Envy is a thick-stemmed, small-capped mutant with a tangled origin story that involves a 1970s Amazon collection. Its caps often fail to open fully, so it drops few spores. That is why PE is more often sold as a swab than a print. Three lines branch from it.
- Uncut PE keeps its veil attached, so the cap never opens at all.
- Melmac is an older PE line, revived and named after the home planet of a 1980s television alien, with twisted, wavy caps.
- Albino Penis Envy is a true albino form, white throughout, with near-colourless spores.
True Albino Teacher
True Albino Teacher, or TAT, is a true albino isolated from a Golden Teacher line. White cap, white stem, faint print. The word "true" distinguishes it from pale Golden Teachers that still make dark spores.
Leucistic Golden Teacher
Leucistic Golden Teacher has lost most of its cap pigment but not its spore pigment. The mushroom looks cream or pale gold, and the print is still dark. This is the clearest example of why leucistic and albino are different words.
Jack Frost
Jack Frost is a recent white strain, usually described as a cross between Albino Penis Envy and True Albino Teacher. Gills and caps carry a frosted look. It is albino, so prints are faint.
Enigma
Enigma is a mutation rather than a conventional strain. It arose from Tidal Wave and forms a dense, brain-like blob with no cap, no gills and no spores. Because it produces no spores, there is nothing to print, and anything sold under the name is an isolate or culture rather than a spore syringe. Listings appear under genetics and isolates.
Tidal Wave
Tidal Wave is a cross of B+ and Penis Envy, named by its breeder. Caps are often wavy or rippled, which gives the name. Dark, heavy prints. Enigma came out of a Tidal Wave line.
Blue Meanie
Two different mushrooms share this name. The cubensis Blue Meanie is a strain reportedly collected in Australia and named for its heavy blue bruising. The other Blue Meanie is Panaeolus cyanescens, a separate species in a different genus. Check the label for the species before you buy.
MAK, Ghost, Jedi Mind Fuck and Shakti
MAK is a newer named line with a thin written history, which is common for recent names. Ghost is a pale, near-white variety named for its colouring. Jedi Mind Fuck was named by a forum breeder in the 2000s; the name is a joke, not a description. Shakti is a recent pale line named after the Sanskrit word for power.
Mexican and Hillbilly
Mexican is one of the oldest named cubensis lines, a classic wild type with an ordinary cap and a dark print. Hillbilly is reported to come from the southern USA and is named for the region rather than the breeder.
Albino versus leucistic: what it means for spores
Pigment in cubensis is laid down in the cap, the stem and the spores. A leucistic mushroom has lost some or most of the pigment in its flesh, but the spores stay dark purple-brown. A true albino has lost pigment everywhere, including the spores, which come out clear to faintly grey.
This matters for buyers in two ways. First, an albino spore print is faint and hard to see, so vendors often supply albino genetics as a swab or syringe instead of a print. Second, under the microscope albino spores are harder to find and photograph, and the usual colour cue for recognising cubensis is gone. Our guide to spore prints and swabs explains how swabs are made and why they suit albino lines.
Related species often listed alongside cubensis
- Psilocybe natalensis was described from the Natal region of South Africa. It looks similar to cubensis and is sometimes confused with it. Spore colour is similar.
- Psilocybe ochraceocentrata is a recently described African species, named for the ochre centre of its cap, and closely related to cubensis.
- Panaeolus cyanescens, the other Blue Meanie, is a different genus. Its spore print is black rather than purple-brown, which is the quickest way to tell the two apart on a slide.
How to read an isolate label
An isolate listing carries more information than a plain spore syringe. A typical label reads something like: Golden Teacher, isolate GT-7, from multispore, transfer 3, agar, March 2026. Here is what each part means.
- Strain: the named line the isolate came from.
- Isolate code: the vendor's own identifier for this single genetic individual. Codes are not standard between vendors.
- Source: from multispore means it was picked out of a mixed population; clone means it was taken from tissue.
- Transfer number: how many times it has been moved to fresh agar. Lower is generally better.
- Medium and date: what it is on and when it was made.
If a label is missing the code or the date, ask. Isolates are sold under genetics and isolates, usually as agar wedges or liquid cultures. For the full list of names, see the strain library, and for choosing between a syringe and a culture read spore syringe vs liquid culture.