Psilocybe argentipes K. Yokoyama

Psilocybe argentipes is a psilocybin mushroom of the family Hymenogastraceae. It is indigenous to Japan where it is commonly referred to as “Hikageshibiretake”. This fairly potent magic mushroom is said to have a similar potency to P. cyanescens aka Wavy Caps, and reports of accidental ingestions describe vivid yet short lived hallucinogenic effects with a dreamy state of consciousness.
Its epithet refers to the patches of fibrils along the stem that give it a silvery hue.

This moderately to highly psychoactive mushroom is probably growing outside of Japan as well and seems to be well-known for its recreational use. In 2002, it was one of the thirteen magic mushrooms to be prohibited in Japan; amongst them were Copelandia (Panaeolus) cyanescens, Panaeolus subbalteatus,Psilocybe subaeruginascens, Psilocybe cubensis, Psilocybe subcubensis, Psilocybe tampanensis, Psilocybe fasciata, Psilocybe lonchophorus, Psilocybe venenata, Psilocybe subcaerulipes, Panaeolus papilionaceus, and Panaeolus sphinctrinus.

P. argentipe has been used in research to test the effects of its consumption on obsessive-compulsive disorder. Perhaps if these accidental ingestions had not occurred, the idea to use this fairly potent strain to treat O.C.D would’t have seen the day.



Visual Description

• Cap: 2.5-5 cm broad. Conic to conic-campanulate when young, expanding to broadly convex, and finally plane with sometimes with a variable sharp umbo. coloration is chestnut when moist, cap is hygrophanous, dimming at disk area to a golden brown, clay-toned yellow or mustard brown. Flesh bruising bluish. Margin incurved when young, irregular and often wavy with time. • Gills: Attachment adnate to adexed. Color orangish when young, soon purplish brown with whitish edges. • Stem: 60-80 mm long by 2-4 mm thick. Equal, enlarged at rhizomorphic base. Color silky white when young, soon yellow toned, then brownish to reddish brown. Partial veil leaving fragile annular zone, soon disappearing if even there. • Spore print: dark purplish brown. • Microscopic features: 6.5-7.5 by 9.5 by 3.3-4.4 µ. • Taste and odor: believed to be farinaceous.

Potency Description

0.25% - 0.75% psilocybin. Moderate

Habitat Origin

Native to Japan and known only from there but probably distributed in outside of Japan as well. Grows gregariously in clusters on soils enriched with wood debris and humus, along trails, underneath or nearby trees such as Cryptomeria japonica, Quercus glauca, or Pinus taeda.

Strain Effects

Said to be fairly potent with a potency similar to P. cyanescens. Accidental ingestion of P. argentipes is reported as a “poisoning by indigenous mushroom Hikageshibiretake”, and described various effects on those who consumed it such as “psychedelic state with dreamy consciousness, psychotic adverse reactions with vivid visual hallucinations, accompanied with anxiety and panic reactions to subjective experiences”. It is said effects were usually short-lived but seemed to leave emotional trauma. Nota bene: literature is subjective, for example, emotional trauma, could be transformative for those who consume it with an intention.

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