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Psilocybe baeocystis

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Psilocybe baeocystis is a psilocybin mushroom of the Strophariaceae family, it contains the hallucinogenic compounds psilocybin, psilocin and baeocystin. The species is commonly known by various names such as bottle caps, knobby tops, blue bells, olive caps and potent psilocybe. There is some evidence to suggest it is synonymous with Psilocybe aztecorum.

Etymology and history

  • From the Greek words baeo (little) and kystis (bladder).
  • 1945 P. baeocystis is first collected in Eugene, Oregon.[1]
  • 1958 P. baeocystis is formally described and published by Singer and Smith.[1]
  • 1962 Psilocin is first reported in this species.[2]
  • 1967-68 Baeocystin[3] and norbaeocystin[4] are discovered and named.
  • 1981 Testing again reveals psilocybin, psilocin, baeocystin and norbaeocystin.[5]

Description

Psilocybe baeocystis has a farinaceous smell and taste.

Cap

The cap is 1.5–5.5 cm in diameter and conic to obtusely conic to convex. The cap margin is turned inwards when young, rarely becoming plane in age, often distinctly rippled, translucent-striate and bruising and aging greenish-bluish about the margin. It is dark olive brown to buff brown in color, occasionally steel blue; when dried it tends toward copper brown in the center. It is hygrophanous, fading to milk white, and viscid when moist from a gelatinous pellicle, usually separable. The flesh is thin and bruises blue easily.

Gills

The gills are close with adnate to sinuate attachment and are grayish to cinnamon brown, with the edges remaining pallid.

Spores

Psilocybe baeocystis spores are dark purplish brown in deposit, oblong in face view or asymmetric ellipsoid (mango form) in side view, and are (8.5) 9.5–13.7(17) x (5) 5.5–6.6(7.1) µm.[6]

Stipe

The stipe is 5–7 cm long, 2–3 mm thick, and equal to subequal. The color is pallid to brownish with white filaments, while often more yellowish towards the apex. Distinct rhizomorphs are found at the base. The stipe is brittle, stuffed with loose fibers, and the partial veil is evanescent and rapidly becomes indistinguishable. It stains blue easily where damaged.

Microscopic features

The basidia are 4-spored, and pleurocystidia are absent. The cheilocystidia are 20–30(40) x 4.5–6(9) µm and fusiod with a narrow neck.[7]

This species is closely related to the subtropical P. aztecorum var. aztecorum, which also bleaches in color to white when dry.[6]

Habitat

Psilocybe baeocystis is solitary to cespitose, and scattered to numerous on ground bark, wood chips, peat moss, decaying conifer mulch, occasionally on lawns, pastures, and rarely in coniferous forests. Often found growing under plants like rhododendrons and rose bushes in mulched garden beds, sometimes growing amongst other Psilocybe species such as Psilocybe stuntzii and Psilocybe cyanescens.

Season

Psilocybe baeocystis grows from August through December, and rarely as early as the end of June.

Distribution

Psilocybe baeocystis is a hemiboreal mushroom, common throughout North America's Pacific Northwest. It was found in Maine in November 2007 and is reported to have been found in Connecticut also.

Biochemistry

Psilocin was first reported in this species in Benedict et al., 1962,[2] and a few years later, Leung and Paul would report the related compound baeocystin, isolated from saprophytic culture,[3] as well as the demethyl analogue norbaeocystin.[4] Beug and Bigwood (1981) also reported on the concentrations of these compounds in Psilocybe baeocystis using reverse-phase HPLC and thin-layer chromatography.[5] Concentration ranges for psychoactive compounds from these studies were reported to be 0.15–0.85% psilocybin, up to 0.59% psilocin, and up to 0.10% baeocystin.

Classification

This mushroom has been placed in the section Aztecorum by Gaston Guzman, other members of the section include Psilocybe aztecorum var. aztecorum, Psilocybe aztecorum var. bonetii, Psilocybe pseudoaztecorum, and Psilocybe quebecensis.

References

  1. 1.0 1.1 Singer R, Smith AH. (1958). New species of Psilocybe. Mycologia 50(1): 141-142.
  2. 2.0 2.1 Benedict RG, Brady LR, Tyler VE (April 1962). "Occurrence of psilocin in Psilocybe baeocystis". J Pharm Sci 51: 393–4. 
  3. 3.0 3.1 Leung AY, Paul AG (January 1967). "Baeocystin, a mono-methyl analog of psilocybin from Psilocybe baeocystis saprophytic culture". J Pharm Sci 56 (1): 146. 
  4. 4.0 4.1 Leung AY, Paul AG (October 1968). "Baeocystin and norbaeocystin: new analogs of psilocybin from Psilocybe baeocystis". J Pharm Sci 57 (10): 1667–71. 
  5. 5.0 5.1 Beug MW, Bigwood J (March 1981). "Quantitative analysis of psilocybin and psilocin in Psilocybe baeocystis (Singer and Smith) by high-performance liquid chromatography and by thin-layer chromatography". J. Chromatogr. 207 (3): 379–85. 
  6. 6.0 6.1 Guzmán G. (1978). Variation, distribution, ethnomycological data and relationships of Psilocybe aztecorum, a mexican hallucinogenic mushroom. Mycologia 70(2): 385-396.
  7. Stamets, Paul (1996). Psilocybin mushrooms of the world: an identification guide. Berkeley, Calif: Ten Speed Press. ISBN 0-89815-839-7. 

External links

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This page uses content from the English Wikipedia. The original article was at Psilocybe baeocystis. The list of authors can be seen in the page history.

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