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Omphalotus illudens.   Click a photo to enlarge it.   back to list

synonyms: Jack O'Lantern, Világító tölcsérgomba
Omphalotus illudens Mushroom
Ref No: 9287
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location: North America
edibility: Poisonous/Suspect
fungus colour: Yellow
normal size: over 15cm
cap type: Funnel shaped
stem type: Lateral, rudimentary or absent
spore colour: White, cream or yellowish
habitat: Grows in woods, Grows on wood

Omphalotus illudens (Schw.) Bigelow Jack O'Lantern Világító tölcsérgomba. Cap 5-20cm across, convex then soon flattened and then funnel-shaped with incurved margin; a brilliant and intense yellow-orange in color; smooth. Gills decurrent, crowded; bright yellow-orange. Stem 50-200 x 10-20mm, tapered at base, solid; colored as cap but darkening at base; smooth. Flesh firm; pale orange. Odor not distinctive. Taste not distinctive. Spores globose, 3.5-5 x 3.5-5µ. Deposit pale cream. Habitat often in enormous clusters at base of stumps or on buried roots (the latter is very common in gardens and lawns) of oaks and some other deciduous trees. Common. Found throughout much of North America, particularly the eastern United States. Season July-September but sometimes to November. Poisonous but usually not fatal, typically causing gastric upset for some hours or even days. Comment When fresh the gills of this species glow a bright greenish yellow in the dark. Based upon cultural evidence, this may be the same as Omphalotus olearius (DC ex Fr.) Singer of southern Europe, which name would then take precedence. On the West Coast the species Omphalotus olivascens Bigelow, Miller & Thiers is found, which differs in its duller brownish-orange to olivaceous cap and larger spores. It is also poisonous.

Members' images and comments

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Amanda Agro (United States) - 28 December 2015

I believe that these are Jack-O-Lantern mushrooms. I used to have a giant tree growing in my yard so there are definitely still roots underground. This picture was taken in late December, but we have had an unusually warm fall this year (it was 65 on Christmas Day). Beware pet owners--- I believe that these mushrooms have been the cause of my dogs upset tummies. Their poop (diarrhea) has been the same color as these mushrooms. I've also seen pieces of mushroom. Gross. Hopefully I got them all when I dug them up!
Omphalotus illudens
Jeff Benjamin (United States) - 08 October 2013

Underside
Omphalotus illudens
Jeff Benjamin (United States) - 08 October 2013

Cluster by mature White Oak
Omphalotus illudens
Richard Hale (United States) - 24 December 2012

For scale the Horihori is 1 ft.
Omphalotus illudens
Harry Swihart (United States) - 30 August 2012

3rd photo of Omphalotus Illudens outhwestern Michigan, USA
Omphalotus illudens
Harry Swihart (United States) - 30 August 2012

I previously posted these under 'Hygrophoropsis Aurantiaca' but sent an email to discard that posting since I have further local confirmation of these being 'Omphalotus Illudens', 'Jack O' Lanterns'. Harry
Omphalotus illudens
gregg carder (United States) - 03 September 2010

Are these Omphalotus illudens? They are growing in my yard in Tuxedo Park, NY
Omphalotus illudens
Timi Hughes (Canada) - 17 August 2010

Omphalotus illudens
Timi Hughes (Canada) - 17 August 2010

and another
Omphalotus illudens
Timi Hughes (Canada) - 17 August 2010

Omphalotus illudens
Timi Hughes (Canada) - 17 August 2010

Thought I would add my pictures of Omphalotus illudens growing under my Oak tree
Omphalotus illudens
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