Small European fibrecap that, uniquely within an otherwise toxic genus, produces psilocybin, baeocystin, and the quaternary tryptamine aeruginascin — the latter discovered through accidental poisonings.
Forms ectomycorrhizal associations with poplar, willow, and other deciduous trees in sandy soils.
- No traditional use
Most other Inocybe species contain dangerous muscarine; this one is a striking chemical outlier and a cautionary tale for identification.
Late spring through early autumn
- Gartz 1986
- Jensen et al. 2006 DOI



