Where’s Wildlife · Mushroom Field Guide

Jack-o’-lantern Mushroom

Omphalotus illudens

Pronounced (approx.): om-fuh-LOH-tus ih-LOO-denz

Orange mushrooms in dense clusters on hardwood stumps or buried roots.

Jack-o’-lantern Mushroom. Select the photo to browse the gallery. Photographs © Where’s Wildlife.

NATIVE

At a Glance

Family
Omphalotaceae
Size
Caps about 3–20 cm across
Habitat
Hardwood stumps and buried roots, especially oak
Ecological role
Decomposes hardwood
Spore surface
Crowded orange gills running down the stem

Fruiting varies with local weather and habitat.

Three Identification Clues

01

Orange caps and stems

02

True gills extending down the stem

03

Dense clusters associated with wood

Field Photographs

Compare cap shapes and visible gills in the photographs below.

Identification & Look-alikes

What to Look For

DSCN57892, DSCN5790 and DSCN5791 are labeled Omphalotus illudens. DSCN2482 is labeled likely Jack-o’-lantern: its underside is not visible. The photographer recalls Illinois, but the location is unconfirmed.

A Closer Look

Chanterelles have blunt folds rather than these thin true gills and rarely form dense clusters. DSCN2482 remains tentative and is excluded from quiz questions.

Habitat & Life History

Habitat & Season

Hardwood stumps and buried roots, especially oak. Late summer and fall.

Ecology & Fruiting

A wood decomposer. Fresh gills may glow faintly in darkness.

Did You Know?

Check the underside

True gills are an important identification clue.

Hidden roots

Clusters can appear to arise from soil.

Keep uncertainty visible

The DSCN2482 identification is tentative.

Range & Sightings

Where It Lives

Eastern North America, including Illinois.

Recorded Observations

Explore reported sightings on iNaturalist. Observation records are not a complete range map.

Identification notes & comments

Think a photograph has a different identification? Please include its filename or describe the image, suggest a name, and explain the identifying features. Links to reliable references are welcome. Thoughtful corrections help improve this guide.

Suggestions are reviewed before we change a label. First-time comments may await moderation.

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