Western Jack-O-Lantern

Omphalotus olivascens

Family: Omphalotaceae

Also called: Western Jack-O-Lantern, Olive Jack-O-Lantern

Western Jack-O-Lantern (Omphalotus olivascens)
Photo:This image was created by user Ron Pastorino (Ronpast) at Mushroom Observer , a source for mycological images. You can c(CC BY-SA 3.0)View original source →

Overview

West Coast Jack-O-Lantern, olive-tinged orange clusters at oak bases. Same illudin toxin — severe GI distress.

Edibility
Toxic
Rarity
common
Trophic mode
parasitic-saprotrophic
Typical peak
Sep–Oct

Season

Sep–Nov — typical fruiting months: Aug, Sep, Oct.

Host trees & substrate

  • Living or recently dead oak

Where it grows

See live fruiting predictions for Western Jack-O-Lantern 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.