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Psilocybe baeocystis

Singer & A.H. Sm.

Psilocybe baeocystis
FamilyHymenogastraceae
GenusPsilocybe
PotencyVery High
Cultivable❌ No
HabitatLignicolous — Peat, conifers, Douglas fir

Common Names

🇬🇧 EnglishBottle Caps, Knobby Tops

Description

Type species of baeocystin (psilocybin analogue alkaloid).

Ecology

Saprophytic among lignin-rich debris, conifers, and peat.

lens_blur Cap (Pileus)

Size:1.5-5.5 cm
Shape:Conical, nodular umbo
Color:Olive to sepia
Surface:Viscous
Margin:Incurved

view_list Gills (Hymenium)

Attachment:Adnate
Color:Gray to purplish brown
Spacing:Tight

straighten Stipe (Stem)

Size:5-7 x 0.2-0.3 cm
Color:White
Surface:Slender
Ring/Veil:Weak curtain

blur_circular Spores (Microscopy)

Shape:Ellipsoids
Dimensions:10-12 x 6-7 µm
Print:Dark purple
Wall:Thick
Germ pore:Present

colorize Flesh

Color:Pale
Bruising:Strong blue
Odor:farinaceous
Taste:farinaceous

Alkaloid Profile (% Dry Weight)

Psilocybin
0.85 – 0.85%
Psilocin
0.59 – 0.59%
Baeocystin
0.10 – 0.10%
Total max:1.54% dry weight

Sources

Stamets 1996

Habitat and Ecology

🌍TypeLignicolous
🌱SubstratePeat, conifers, Douglas fir
⛰️ElevationLow
📅SeasonAutumn to winter

Geographic Distribution

Pacific Northwest (PNW)

⚠️ Lookalike Species

Confusion with these species can be dangerous or fatal. Always consult an expert mycologist.

warning
Galerina marginata — MDeadly

Cap flat, not olivaceous, spore print rusty.

📚 Scientific References

  • Singer & A.H. Smith
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