P. aerugineomaculans

Psilocybe subaeruginascens aka P. aerugineomaculans is a species of magic mushroom closely related to hallucinogenic species Psilocybe stuntzii, P. subfimetaria, and Psilocybe ovoideocystidiata. Its epithet contains the Latin root “aeru- “ meaning “blue-green” which probably refers to its prominent bluing.

Other similar psilocybin-containing Psilocybes are Psilocybe cearulipes also commonly called Blue Foot, and in the Bay Area of California, a Psilocybe ovoideocystidiata has been reported to look very similar as well.

Because it shares similarities with the epithet of Inocybe aeruginascens, one wonders if it contains the rare compound aeruginascin. Aeruginascin is an analog to psilocybin and is closely related to the frog skin toxin bufotenine (5-HTQ), a potent 5-HT3 receptor agonist. This compound, identified by chemist and mycologist Jochen Gartz in the eighties, is believed to be the equivalent of what CBD is to THC.

Psilocybe subaeruginascens is one of these rather rare magic mushrooms growing in the wild, looking like others it is easily mistaken with. Its obscure nature makes it to us “the enigmatic bluing Psilocybe” from Japan, Java, and South Africa.

The Japanese refer to magic mushrooms in various ways: “maitake” (dancing mushroom), “waraitake” (laughing mushroom), “o-waraitake” (big laughing mushroom), “odoritake” (jumping mushroom) or “shibiretake” (numbing mushroom). Since Psilocybe subaeruginascens is known to grow in Japan, we can propose to demystify this enigmatic magic mushroom and say that most probably, it is amongst the psilocybin-producing species that cause all these wonderful effects. From jumping, to numbing, to laughing, these organisms are


Visual Description

• Cap: 1-6 cm broad. Conic to campanulate, to broadly campanulate with no umbo, to finally broadly convex or plane, lifting in age. Margin translucent striates, Coloration orangish brown to olive brown, to greenish brown, cap is highly hygrophanous, fading to dull yellow orange, to straw in drying. Flesh bruising bluish. • Gills: Attachment broadly adnate to adnexed, sometimes decurrent. Placement crowded. Color grayish brown to yellowish brown, dark brown, and often slightly mottled t maturity. Bruising bluish. • Stem: 30-60 mm long by 1.5-3 mm thick. Equal, slightly enlarged at rhizomorphic base. Coloration whitish, or similar to cap, soon bruising bluish. Partial veil annulus persistently present, well developed and soon bruising bluish and turning purplish brown with spore drop. • Spore print: dark purplish brown. • Microscopic features: 7.7-12 by 6.6-8.5 µ. • Taste and odor: farinaceous.


MODERATE 0.25% - 0.75%

Habitat Origin

Found growing from April to July in Southern Japan and subtropical Java, Indonesia. Probably distributed between these two areas. Also reported fruiting in February and March in Kwazulu-Natal South Africa. Grows gregariously and in clusters in wood chips, humus, woody debris and gardens, in metropolitan areas, or along trails and roads in deciduous forests. It is occasionally found in dung.


The Japanese refer to magic mushrooms in various ways such as “maitake” (dancing mushroom), “waraitake” (laughing mushroom), “o-waraitake” (big laughing mushroom), “odoritake” (jumping mushroom) or “shibiretake” (numbing mushroom). We can only speculate it has similar psychotronic effects as other moderately active psilocybin species. Thus, effects would include euphoria, visual stimulation with slight tracing effects and at higher doses hallucinations, impulses of energy, dilated pupils, enhanced heartbeat, occasional nausea, and a numbing physical effect.

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