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How to Identify Jack-o'-lantern mushroom

Omphalotus illudens
POISONOUS — DO NOT CONSUME Season // Aug-Nov Family // Omphalotaceae

Description

Omphalotus illudens is a bright orange to yellow mushroom that often grows in clusters. It features a funnel-shaped cap with a wavy margin and is known for its bioluminescent properties in decaying wood.

Key Identification Features

Field marks recorded for this species. Work through all of them, not just one:

  • Bright orange to yellow cap
  • Funnel-shaped with wavy edges
  • Gills are closely spaced and run down the stem
  • Bioluminescent in dark conditions
  • Stem is solid and often the same color as the cap

Specimen Profile

FamilyOmphalotaceae
GenusOmphalotus
EdibilityPoisonous — do not consume
Toxicitymedium
SeasonAug-Nov
HabitatTypically found on decaying wood, particularly hardwoods.
RegionNorth America, particularly in the eastern United States.

Habitat & Distribution

Habitat: Typically found on decaying wood, particularly hardwoods.

Region: North America, particularly in the eastern United States.

Seasonality

Fruits from late summer to fall.

Typical months: Aug-Nov

Common Lookalikes

Always verify identification to avoid these similar species. The differentiator is the point — learn the one or two tells that separate them:

Chanterelle (edible)

HOW TO TELL APART

Chanterelles have a more trumpet-like shape and do not have true gills.

Hygrophoropsis aurantiaca (inedible)

HOW TO TELL APART

Similar color but has a more distinct, non-funnel shape and lacks bioluminescence.

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Pin the sighting and compare this species against its lookalikes in the offline database — confusion runs both ways, and knowing where toxic species fruit makes every future ID safer.

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Disclaimer: This guide is for educational purposes only. Never consume a wild mushroom unless you are 100% certain of its identification.