How to Identify Jack-o'-lantern mushroom

Scientific Name: Omphalotus olearius

Jack-o'-lantern mushroom (Omphalotus olearius) identification
Image source: MushroomObserver (CC BY-SA 3.0)

⚠️ Toxicity Warning

This species is recorded as poisonous. Do not consume. Consumption can cause gastrointestinal distress and other symptoms. It is important to avoid this mushroom due to its resemblance to edible species.

Description

Omphalotus olearius is a bright orange to yellow mushroom that often grows in clusters. It features a funnel-shaped cap with a wavy margin and gills that are decurrent, meaning they run down the stem.

Key Identification Features

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

Habitat & Distribution

Habitat: Typically found on decaying wood or stumps, particularly in hardwood forests.

Region: Found in North America, Europe, and parts of Asia.

Seasonality

Fruits from late summer to early fall.

Typical months: Aug-Oct

Common Lookalikes

Always verify identification to avoid these similar species:

Related Species

Browse all species in the Mushroom Database →

Spotted Jack-o'-lantern mushroom? Map It

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.