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Posted on Wednesday, January 08, 2003 - 01:00 am:Edit Post Quote Text Delete Post Print Post Move Post (Moderator/Admin Only)

Species: Psilocybe Cubensis
= Stropharia cubensis Earle.
= Stropharia cyanescens Murr.
= Stroparia caerulescens (Pat.) Sing.
= Naematoloma caerulescens Pat.
= Hypholoma caerulescens (Pat.) Sacc. & Trott.

STRAINS: Strains of Psilocybe cubensis are avaliable from private and commercial stocks. The American Type Culture Collection, which sells cultures to educational organizations and research facilities, has stock cultures of several wild strains. Note that the strains listed below are only some of those that are presently circulating. There are many more. Some strains may originate fromt he same region but have features not in agreement with those described here.

Amazonian: Medium to large mushrooms on rye grain; thick whitish stems; tenaciously attatched to the casing.

Ecuadorian: Medium sized mushrooms on rye grain; hemispheric caps; abundant primordia former; high yeilding on compost; thin whitish stems; easily picked.

Matias Romero: Medium to large mushrooms on rye grain; early fruiter; thick whitish stems, and tenaciously attached.

Misantla: Medium sized mushrooms on rye grain; thin yellowish stems; tall standing, and easily picked.

Palenque: Large mushrooms on rye grain; high yeilding; and easily picked.

COMMON NAMES: San Isidro, Cubensis

GREEK ROOT: Psilocybe come fromt he Greek root "psilos" meaning bald head and cubensis, a name Earle assigned to this mushroom because it was first recognized as a new species from specimens collected in Cuba.

GENERAL DESCRIPTION: A medium to large size mushroom having a cap that becomes convex to plane in age and is usually pigmented chestnut brown to deep yellowish or golden brown. The cap surface is finely fibrillose, sometimes covered with scattered, fugacious, cottony scales that soon disappear. The partial veil is membranous, well developed and typically leaving a persistent annulus on the upper regions of the stem. The stem is often covered with dense fibrils below. Fresh bruising bluish or bluish green. Its spores purplish brown in mass.

NATURAL HABITAT: Naturally found in horse or cow pastures, in dung or in soil enriched with manure. Psilocybe cubensis is a widely distributed species that is found throughout tropical and subtropical zones of the world and is common in the pasturelands of the gulf coast of the Southern United States and eastern Mexico.


Mycelial Types: Rhizomorphic to linear; whitish in overall color but often bruising bluish where injured.

Standard Spawn Medium: Rye grain.

Fruiting Substrate: Rye Grain; wheat straw; leached horse or cow manure; and/or horse manure/straw compost balanced to a 71-74% moisture content.

Method of Preparation: Pasteurization achieved though exposure to live steam for 2 hours at 140 degrees F. throughout the substrate. Straw or compost should be filled to a depth of 6-12 inches. Spawn should be spawned at a rate of 2 cups/sq. ft.

Spawn Run:
Relative Humidity: 90%
Substrate Temperature: 84-86 deg. F. Thermal death limits have been established at 106 deg. F.
Duration: 10-14 days.
CO2: 5000-10,000 ppm.
Fresh Air Exchanges: 0 per hour.

Type of Casing: After fully run, cover with the standard casing whose preparation is described in Chapter VIII. Layer to a depth of 1-2 inches. The casing should be balanced to an initial pH of 6.8-7.2.

Post Casing/Prepinning:
Relative Humidity: 90+ %.
Substrate Temperature: 84-86 deg. F.
Duration of Case Run: 5-10 days.
CO2: 5000-10,000 ppm.
Fresh Air Exchanges: 0 per hour.
Light: Incubation in total darkness.

Primordia Formation:
Relative Humidity: 95-100%
Air Temperature: 74-78 deg. F.
Duration: 6-10 days.
CO2: less than 5000 ppm.
Fresh Air Exchanges: 1-3 per hour.
Light: Diffuse natural or exposure for 12-16 hours/day of grow-lux type fluorescent light high in blue spectra at the 480 nanometer wavelength.

Relative Humidity: 85-92%.
Air Temperature: 74-78 deg. F.
CO2: less than 5000 ppm.
Fresh Air Exchanges: 1-3 per hour.
Flushing Pattern: Every 5-8 days.
Harvest Stage: When the cap becomes convex and soon after teh partial veil ruptures.
Light: Indirect natural or same as above.

Yield Potential: Average yields are 2-4 lbs./sq.ft. over a 5 week cropping period. Maximum yield potential has not been established.

Mositure Content of Mushrooms: 92% water, 8% dry matter.

Nutritional Content: Not yet established.

Comments: One of the easiest mushrooms to grow, this species fruits on a wide variety of substrates within broad environmental parameters.As a primary and secondary decomposer, Psilocybe cubensis fruits well on untreated pasteurized straw and on horse manure/straw composts transformed by microbial activity. Sterilized grain typically produces smaller mushrooms than bulk substrates. Given the numerous substrates that support fruitings, Psilocybe cubensis is well suited for home cultivation.
Psilocybe cubensis cultivation was unheard of twenty years ago. Today, the species ranks amongst one of the most commonly cultivated mushrooms in the US and soon the world. This sudden escalation in interest is largely due to the publication of several popular guides illustrating techniques for its culture.
Psilocybe cubensis is a mushroom with psychoactive properties, containing up to 1% psilocybin and/or psilocin per dried gram. The function of these serotonin-like compounds in the life cycle of the mushroom is not known.

Genetic Characteristics: Basidia tetrapolar (4-spored), forming haploid spores (1N); heterothallic. The mating of compatible monokaryons often results in fruting strains. Clamp connections are present.

The following excerpt was taken from: The Mushroom Cultivator: A Practical Guide to Growing Mushrooms at Home. By: Paul Stamets and J.S. Chilton.}

(Message edited by admin on March 08, 2004)
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Admin (Admin)
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Registered: 02-2001
Posted on Sunday, July 25, 2004 - 04:31 pm:Edit Post Quote Text Delete Post Print Post Move Post (Moderator/Admin Only)


(Message edited by admin on July 25, 2004)


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