B+ Spores UK: Complete Microscopy Guide
B+ is a familiar cultivar name in the Psilocybe cubensis community and is often mentioned alongside Golden Teacher, Penis Envy and other named varieties. Its long-standing popularity makes it a useful subject for exploring fungal classification, spore morphology and the differences between species-level characteristics and cultivar names.
For microscopy research, an important question is what B+ spores can tell us about a sample. Which features can be observed, and can those features distinguish B+ from other named Psilocybe cubensis varieties?
This guide explores the reported background of B+, its general spore characteristics and the scientific limitations of identifying a cultivar through microscopy alone.
Quick overview
- Common nameB+
- SpeciesPsilocybe cubensis (species commonly associated with it)
- Research interestsSpore morphology and fungal variation
- Features to observeShape, pigmentation, dimensions and visible structures
- LimitationMicroscopic appearance alone cannot reliably confirm a specific cultivar
1. What Is B+?
B+ is a name commonly used for a cultivar associated with Psilocybe cubensis, a recognised fungal species that includes many informally named varieties.
Cultivar names are useful for distinguishing named lines in hobbyist and commercial contexts, but they are not separate scientific species. Their histories and genetic backgrounds are not always documented in independently verified scientific sources.
Where did B+ originate?
B+ has circulated in mushroom-growing and mycology communities for decades. However, its precise origin and the explanation behind its name are not firmly established in widely accessible scientific literature.
Online accounts sometimes attribute the cultivar to a particular person or location, but these stories should be treated as reported history rather than confirmed fact unless supported by reliable documentation.
For a scientific discussion, it is more useful to distinguish the well-established species classification from the less certain history of the cultivar name.
Is B+ a separate species?
No. B+ is commonly described as a cultivar of Psilocybe cubensis, rather than a separate species.
The scientific name identifies the species. B+ is an informal cultivar label associated with particular material within that species.
This distinction matters because many microscopic features are shared across P. cubensis. A cultivar name does not automatically imply a unique spore shape, colour or size.
2. What Do B+ Spores Look Like Under a Microscope?
The best starting point is the general morphology of Psilocybe cubensis spores. Published descriptions commonly characterise them as ellipsoid to subellipsoid, with brown to purple-brown pigmentation.
These characteristics apply at the species level and should not be presented as exclusive to B+.
Shape
Spore shape is one of the basic features recorded in fungal microscopy. Ellipsoid describes a broadly oval form, while subellipsoid describes a shape that is approximately ellipsoid but may differ slightly in outline.
The orientation of a spore can also affect its apparent shape. Observations should therefore be based on the specimen and viewing conditions rather than assumptions about the cultivar name.
Colour and pigmentation
Psilocybe cubensis spores are generally described as brown to purple-brown. Their apparent colour may vary with lighting, optics, sample condition and preparation.
The name B+ does not refer to a particular spore colour. Colour is useful to document, but it cannot independently establish a cultivar’s identity.
Dimensions
Spore dimensions are commonly recorded in micrometres (µm). Published descriptions of P. cubensis report a range of sizes, but the exact values vary between references and specimens.
Measurements often quoted for B+ online should be understood as reported values, not as a unique or universally verified range for this cultivar. There is insufficient reliable comparative evidence to assume that B+ always produces larger or more uniform spores than other named varieties.
Accurate measurements require calibrated equipment, suitable image quality and observations of multiple spores.
Germ pore and surface features
A germ pore is a structural feature described in P. cubensis spores. Researchers may also record visible wall characteristics and other details when the image quality permits.
These observations can help describe a specimen. However, the presence of a germ pore or a particular general spore shape is not proof that a sample is B+ rather than another P. cubensis cultivar.
3. Why Is B+ So Well Known?
B+ is frequently discussed in hobbyist communities and is often included in introductory comparisons of named P. cubensis varieties.
Its recognition makes it a convenient subject for learning the language of fungal morphology and understanding how researchers describe a sample.
A familiar reference name
Because B+ is widely recognised in community discussions, it often appears in comparisons with Golden Teacher and other cultivar names.
Community photographs and descriptions can provide examples to discuss, but they should not be confused with controlled scientific comparisons.
An opportunity to study variation
Samples labelled B+ can be used as a topic for discussing variation in spore appearance. A useful research approach is to record what is visible and compare observations made under consistent conditions.
It is important not to assume that all spores from a named cultivar will look identical. Biological variation, specimen condition and viewing conditions can influence observations.
A useful introduction to fungal classification
B+ also provides a straightforward example of the difference between a species and a cultivar name.
The species name Psilocybe cubensis has a taxonomic meaning. B+ is a commonly used name for a cultivar associated with that species, and its exact commercial identity cannot be confirmed from the label alone.
4. B+ vs Golden Teacher, Penis Envy and Other Varieties
B+ is often compared with Golden Teacher, Penis Envy, Albino A+ and Tidal Wave. These comparisons can help explain how named varieties are discussed, but they need to distinguish reported traits from established scientific findings.
| Comparison | What can reasonably be said |
|---|---|
| B+ vs Golden Teacher | Both names are commonly associated with P. cubensis. Their general spore characteristics may overlap. |
| B+ vs Penis Envy | Both are associated with P. cubensis. Reported differences in mushroom appearance do not automatically establish unique spore characteristics. |
| B+ vs Albino A+ | The names are associated with P. cubensis. Claims about pigmentation should be evaluated carefully and not inferred from a label alone. |
| B+ vs Tidal Wave | Both are commonly discussed as P. cubensis varieties. Reported lineage claims should be distinguished from independently verified genetic evidence. |
B+ vs Golden Teacher
Golden Teacher is another familiar P. cubensis cultivar name. It is frequently used as a reference in discussions of spore morphology.
The general shape and pigmentation reported for the two names can overlap. Claims that B+ spores are consistently larger, more uniform or more densely represented in a suspension require reliable comparative data.
B+ vs Penis Envy
Penis Envy is commonly discussed because of its reported distinctive mushroom morphology. However, mushroom appearance and spore morphology are different sets of characteristics.
Even where hobbyist sources describe differences in spore production, wall thickness or dimensions, those claims should not be treated as definitive diagnostic rules without supporting evidence.
B+ vs Albino A+
Albino A+ is commonly associated with a pale-looking P. cubensis variety. This makes it relevant to discussions about pigmentation, but the name alone does not establish the precise genetic basis of the colour.
Comparisons should focus on recorded observations and avoid assuming that a pale appearance proves a particular genetic trait.
5. Can Microscopy Confirm B+?
Microscopy is a valuable way to study fungal structures and document their visible characteristics. It can help researchers describe a sample in a consistent and repeatable way.
For a sample labelled B+, useful observations may include:
- General spore shape
- Apparent pigmentation under the chosen optical conditions
- Dimensions measured using calibrated equipment
- Visible structural features
- Differences between individual spores in the same sample
These observations can contribute to a description of the material, but their interpretation depends on sample quality and reliable methods.
What microscopy cannot establish on its own
Microscopy alone cannot reliably confirm:
- The exact commercial cultivar name
- The complete genetic background of a sample
- The origin or authenticity of a supplier’s label
- Whether two visually similar samples are genetically identical
Many named P. cubensis cultivars share overlapping species-level spore characteristics. A slide may provide useful morphological information without proving that the sample is B+.
Why careful documentation matters
A good research record separates observation from interpretation. For example, noting that a sample contains ellipsoid spores with brown-purple pigmentation is a description of visible features.
Claiming that those features prove the sample is B+ goes beyond what microscopy alone can establish.
6. How to Record Spore Observations
Consistent documentation makes microscopy observations easier to compare and review.
A useful record can include:
- Sample label and source information
- Date of observation
- Microscope and optical conditions
- Observed shape and colour
- Dimensions, if measured using calibrated equipment
- Photographs and notes about image quality
- Any limitations that could affect interpretation
When comparing images, remember that magnification, illumination and preparation can change how features appear. Recording these conditions helps prevent technical differences from being mistaken for biological differences.
Use cautious wording for traits that have not been independently established. Terms such as “observed in this sample” or “reported in hobbyist sources” make it clearer whether a statement is a direct observation or an unverified claim.
Conclusion
B+ is a familiar cultivar name associated with Psilocybe cubensis and a useful topic for learning about fungal classification and microscopy.
Its popularity has led to many claims about its origin, spore abundance and microscopic characteristics. Those claims should be distinguished from established species-level descriptions and independently verified research.
The most reliable approach is to document observable features, use appropriate measurement methods and avoid treating spore size, shape or colour as proof of cultivar identity.
Microscopy can help describe fungal material, but understanding its limitations is essential for accurate research.
For more educational articles about fungal morphology and microscopy, visit the Mushroom Spores UK Mycology Research Blog.
Frequently Asked Questions
What are B+ spores?
B+ spores are spores from material labelled or described as the B+ cultivar, commonly associated with Psilocybe cubensis. The label itself does not independently verify the specimen’s identity.
How big are B+ spores?
B+ is generally discussed using the published spore morphology of P. cubensis. Online sources quote different measurement ranges, but a unique, universally established size range for B+ should not be assumed without reliable comparative research.
What colour are B+ spores?
Psilocybe cubensis spores are commonly described as brown to purple-brown. The precise appearance can depend on the sample and viewing conditions, and colour alone cannot confirm the B+ cultivar.
Are B+ and Golden Teacher the same species?
Both are commonly associated with Psilocybe cubensis. They are cultivar names rather than separate species names, and their general spore characteristics may overlap.
Are B+ spores more uniform than other cultivars?
This is sometimes claimed in hobbyist discussions, but it should not be treated as an established fact without reliable comparative studies. Individual observations cannot demonstrate a universal difference between cultivars.
Can you identify B+ under a microscope?
Not reliably at the cultivar level using microscopy alone. A microscope can reveal and document spore characteristics, but those features do not independently confirm the commercial name or genetic identity of the sample.
Is B+ legal in the UK?
The legal position depends on the material and the activity involved. Do not assume that all activities involving spores or related materials are lawful simply because spores themselves may not contain controlled compounds. Check current UK legislation and authoritative guidance before purchasing, possessing or using such material. This article is educational information, not legal advice.