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Psilocybe ovoideocystidiata

Psilocybe ovoideocystidiata

Scientific classification
Kingdom: Fungi
Division: Basidiomycota
Class: Homobasidiomycetes
Order: Agaricales
Family: Strophariaceae
Genus: Psilocybe
Species: P. ovoideocystidiata
Binomial name
Psilocybe ovoideocystidiata
Guzmán et Gaines

Range of Psilocybe ovoideocystidiata
Psilocybe ovoideocystidiata
mycological characteristics:
gills on hymenium

cap is convex or umbonate


hymenium is adnate


stipe is bare


spore print is blackish-brown or purple


ecology is saprophytic


edibility: psychoactive

  Psilocybe ovoideocystidiata is a psilocybin-containing mushroom first documented in Pennsylvania and also known from Michigan, Ohio and West Virginia. This mushroom bruises blue where handled and has been put into the Stuntzii section of Psilocybe because it has subrhomboid thick walled spores and an annulus. It is closely related to to P. subaeruginascens from Java, P. septentrionalis from Japan, and P. wayanadensis from India.

This mushroom was first documented by Richard V. Gaines in Montgomery County in June of 2003 and has become common in the Ohio river valley.

Its range and appearance are similar to Psilocybe caerulipes, and it can be distinguished by its rhomboid spores and membranous annulus.

Some specimens of Psilocybe ovoideocystidiata turn blue immediately when bruised, while others have a delayed or almost absent bluing reaction. The mushroom often turns blue in the absence of bruising as it dries out.


  • Cap: Surface smooth, convex to subumbonate, 1.5 to 4 cm across, chestnut brown, olive green, or white. Slippery when moist with striations at the edge, fading to buff as it dries and often turning blue.
  • Gills: adnate attachment and range from whitish to rusty brown, lavender, or dark purple brown.
  • Spores: Dark purple brown, rhomboid to subrhomboid in face view, subellipsoid in side view, 8 x 6 micrometers.
  • Stipe: 2 to 7.5 cm long, hollow, smooth at the top and often having small scales near the bottom, colored whitish with irregular yellowish, brownish, or bluish patches. With a membranous annulus.
  • Taste: farinaceous
  • Odor: farinaceous
  • Microscopic features: Two types of cheilocystidia and pleurocystidia are present.

This mushroom quickly (after a few minutes) bruises blue when damaged.


    • New Species of Hallucinogenic Psilocybe from the Eastern U.S.A. - International Journal of Medicinal Mushrooms, Vol. 9, pp. 75–77 (2007)
    This article is licensed under the GNU Free Documentation License. It uses material from the Wikipedia article "Psilocybe_ovoideocystidiata". A list of authors is available in Wikipedia.
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