About Gulf Coast (Psilocybe cubensis): Name, Origin Claims and Spore Traits Mushrooms
Updated: October 8, 2026
Mushroom spores are sold strictly for microscopy and research purposes only. Cultivation of Psilocybin-containing fungi is illegal in many jurisdictions. This page is not a guide to finding, growing, or taking mushrooms.
Short answer: Gulf Coast is a trade name for material sold as Psilocybe Cubensis (Earle) Singer. It is not a separate species, a published variety, or a recognised variant. Sellers say it comes from the Gulf coast of the United States, but they disagree on where: Texas, Florida, or somewhere from Texas to Florida. At least two seller pages contradict themselves, with the Gulf Coast name next to an "east coast of Florida" origin, which is on the Atlantic side. None names a collector, a date or a specimen. Under a microscope, a sample shows the spore characters of P. cubensis, which cannot confirm the label or the origin.
Home » Strain Encyclopedia » Psilocybe Cubensis » Gulf Coast
In this guide
- What Gulf Coast is
- Taxonomy
- What is documented and what is lore
- Spore and cap traits
- Origin claims, source by source
- Names and look-alike names
- Identifying it, and what a microscope can't tell you
- Examining a slide
- Mushly products
- Legal note
- References
- FAQ
What Gulf Coast is
Gulf Coast is one of many named lines of Psilocybe cubensis in Mushly's all-strains library. The name is a catalogue label used by spore sellers. It describes a product and not a taxon, and a coastline in the name is a seller's claim and not a specimen record. For the difference between a species and a trade name, see our species vs strain primer and the Psilocybe cubensis species guide.
"Gulf Coast is a trade name for Psilocybe cubensis, not a species or published variety. Sellers place it in Texas, Florida or Mississippi, sometimes contradicting themselves; none names a collector or date. Claims compared."
Taxonomy
| Rank | Entry |
|---|---|
| Kingdom | Fungi |
| Phylum | Basidiomycota |
| Class | Agaricomycetes |
| Order | Agaricales |
| Family | Placement varies by source: Index Fungorum, Species Fungorum and NCBI list Agrocybaceae, while Wikipedia and many other references use Hymenogastraceae |
| Genus | Psilocybe |
| Species | Psilocybe cubensis (Earle) Singer, Sydowia 2(1-6): 37 (1948) |
| Basionym | Stropharia cubensis Earle (1906), described from Cuba |
| Trade name | Gulf Coast (informal) |
Species records: Index Fungorum 290107, the Species Fungorum synonymy and NCBI Taxonomy 181762. None lists Gulf Coast.
What is documented and what is lore
| Question | Status |
|---|---|
| Is Gulf Coast a species or published variety? | No. The only formal name is Psilocybe cubensis. |
| Spore size and shape | Published for the species only, with no Gulf Coast-specific measurements. |
| From the Gulf coast | Seller claim only, and sellers disagree on the state. No collector, date or herbarium record is published. |
| Mississippi origin | Reported as one account. Unverified. |
| Published literature using the name | PubMed returned no results when Mushly checked, and none is known. |
Spore and cap traits
Short answer: the published measurements describe the species, not this name.
Singer and Smith's 1958 Mycologia monograph (Mycological investigations on Teonanácatl) describes P. cubensis spores as:
- Size: 11.5-17.3 × 8-11.5 × 7-9 µm
- Surface: smooth, with a thick, complex wall
- Apex: truncate, from a distinct apical pore
- Colour in a mountant: dark yellow brown in KOH, dark olive brown in NH4OH
The KOH and NH4OH colours are mountant colours, not spore-print colours. The paper does not mention Gulf Coast. Guzmán et al. (2012) give a second species-level range of (12-)13-15(-17) × 8-10(-11) × 7-9 µm.
Seller descriptions are not diagnostic. One seller says caps are "often light yellow or beige, sometimes gold or bronze colored as well with a darkened center spot" (Golden Teacher Spores), and another says only "expect large caps" (Ryzo Bioscience). None of the pages we checked gives a measured spore size for this label. Record what you actually see on your own slide.
Origin claims
Short answer: the sellers agree on "Gulf Coast," then disagree about where it is.
| Source | What it says |
|---|---|
| Ryzo Bioscience | "Hails from the Gulf Coast of America," while its origin field reads "East coast of Florida." Names no collector or date. |
| Golden Teacher Spores | "Originated near the Gulf of Mexico, around the Texas Coast," and also "from the eastern coastal region of Florida." Names no collector or date. |
The sources agree only on a US Gulf setting. Two of the pages we checked pair the Gulf Coast name with an eastern Florida origin, and Florida's east coast faces the Atlantic. Another account says Texas, and one reports Mississippi. We do not state a state, a collector or a year as fact. A repeated claim is still one claim.
Names and look-alike names
- Treasure Coast is a separate catalogue name for a line sellers place on Florida's coast, again with Atlantic and Gulf claims. See our Treasure Coast page. No source showing it is the same line as Gulf Coast is known, and a shared coastline is not a lineage.
- Other seller names that contain "Gulf" are separate catalogue labels, and a shared word is not a lineage.
Record the exact label, supplier and date on every sample.
Identifying it
Short answer: microscopy supports a species-level note, not a strain identity.
- What a match shows: smooth, thick-walled spores with a truncate apex and germ pore, within the published species range, support P. cubensis as the species to compare. Ramírez-Cruz et al. 2013 notes that spore characters overlap across Psilocybe.
- What it cannot show: that a packet is Gulf Coast rather than another cubensis label, that it came from any Gulf state, or that it differs from Treasure Coast.
- Chemistry: Mushly makes no claims about the chemical content of Gulf Coast, and no published laboratory analysis under this name is known.
Examining a slide
Follow the general method in our Golden Teacher guide and the mushroom spores guide, and then:
- Measure at least 20 spores (length × width) and record the magnification and mountant.
- Note the germ pore, the wall, and the shape in face and side view.
- Record the colour in the mountant and the print colour separately.
- Write down the exact label (Gulf Coast), supplier and date.
- Remember the limit: a fit to P. cubensis does not prove the Gulf Coast label.
Mushly products
Mushly does not currently list a syringe, print or multi-pack named Gulf Coast. This page is a reference note and not a product page. To study related lines, browse our spore syringes for microscopy or see the Psilocybe cubensis strain list.
Legal note
Mushly offers spores for microscopy, taxonomy, and mycological research. Laws on spores, and on psilocybin-containing mushrooms, differ by country and by U.S. state, and cultivation of psilocybin- or psilocin-containing species is illegal under U.S. federal law and in many other jurisdictions. Check the law where you live before ordering.
Browse spore syringes · Strain library · Mushroom spores for microscopy guide
References
- Index Fungorum 290107; Species Fungorum synonymy; NCBI Taxonomy 181762
- Singer, R. & Smith, A.H. (1958), Mycologia 50
- Guzmán et al. 2012, Mycotaxon 119: 65-81
- Ramírez-Cruz et al. 2013, Canadian Journal of Botany
- Seller claims (not papers, not verified): Ryzo Bioscience; Golden Teacher Spores; OnlySpores, Spore Hunter, Magic Spore Labs, Ralphsters, Supreme Spores and Sporeworks
What is Gulf Coast?