Knobby Tops

Psilocybe baeocystis

Family: Hymenogastraceae

Also called: Bottle Caps, Knobby Tops, Olive Cap

Knobby Tops (Psilocybe baeocystis)
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Overview

Wood-chip Psilocybe of the Pacific Northwest, mid-potency. Schedule I federally. Galerina risk on same substrate.

Edibility
Edible
Rarity
uncommon
Trophic mode
saprotrophic
Typical peak
Aug–Sep

Season

Jul–Oct — typical fruiting months: Jun, Jul, Aug, Sep.

Host trees & substrate

  • Decaying birch wood and forest litter
  • Decaying aspen wood and forest litter
  • Decaying cottonwood wood and forest litter

Where it grows

See live fruiting predictions for Knobby Tops on the forecast home page, or browse the full field guide.

Always confirm wild-mushroom identification with multiple sources and a knowledgeable local expert before consuming. Read the foraging safety guide.