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Jack-o'-lantern Mushroom
Omphalotus olearius, the jack-o'-lantern mushroom of southern Europe, is a poisonous orange gilled mushroom that grows in clusters on stumps, buried roots and tree bases, especially the decaying roots of olive trees. Fresh gills glow a faint blue-green in the dark. North American jack-o'-lanterns are separate species: O. illudens in the east and O. olivascens in California.
Poisonous. Contains illudin S, which causes very severe cramps, vomiting and diarrhea; not usually lethal. Confused with chanterelles, which have blunt false gills (ridges) and a stem that is paler inside when peeled.
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Mycology is an evolving science: names, classifications and safety information change as research advances. Entries are compiled from cited sources and reviewed, but may be incomplete or out of date — check the sources, and never rely on this library alone to identify or eat a mushroom.
