Jack O' Lantern Mushroom Omphalotus illudens (Schweinitz) Bresinsky & Besl.  Synonyms: Omphalotus olearius.

Status:

Found in clusters at bases of deciduous stumps and tree trunks (usually oak); may be on ground on buried wood.

Description:

Cap: Bright orange, sticky; convex, to flat, to funnel-shaped; may have small umbo; flesh white with orange tinge; sweet odor. Gills: Yellow-orange, decurrent, close. Stalk: Yellow-orange. Handling stains hands. In a dark room, the gills of fresh specimens "give off an eerie green glow" (Lincoff). (J. Solem, pers. comm.)

There are 28 records in the project database.

GA AL WAFR CLMO HO BABCHACEPGAACVCHSMKEQACNTADOWISOWO
Jack O' Lantern Mushroom in Garrett Co., Maryland (7/16/2013). Photo by Matt Tillett. (MBP list)

A Jack O' Lantern Mushroom in Howard Co., Maryland (9/24/2011). Photo by Nancy Magnusson. (MBP list)

Jack O' Lantern Mushroom in Frederick Co., Maryland (10/14/2018). Photo by Bob Cammarata. (MBP list)

Jack O' Lantern Mushrooms in Howard Co., Maryland (8/16/2013). Photo by Richard Orr. (MBP list)

Jack O' Lantern Mushroom (gills of mature fruiting bodies) in Howard Co., Maryland (8/20/2009). Photo by Joanne Solem. (MBP list)

Jack O' Lantern Mushrooms in Frederick Co., Maryland (9/28/2014). Photo by Jim Brighton. (MBP list)

Jack O' Lantern Mushroom in Allegany Co., Maryland (10/1/2014). Photo by Kimberly Booth. (MBP list)

Jack O' Lantern Mushroom (growth habit) in Howard Co., Maryland (10/9/2009). Photo by Robert Solem. (MBP list)

Spores collected from a Jack O' Lantern Mushroom specimen in Howard Co., Maryland (8/20/2009). Ellipsoid, smooth; measured 4.5-5.0 X 3.2-4.0 microns. Photo by Robert Solem. (MBP list)


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