|gills on hymenium|
|cap is infundibuliform|
|hymenium is decurrent|
|stipe is bare|
|spore print is yellow|
|ecology is saprotrophic|
Omphalotus olivascens, commonly known as the western jack-o'-lantern mushroom, is an orange to brown-colored gilled mushroom native to California and Mexico. To an untrained eye, O. olivascens appears similar to some chanterelles, but unlike the chanterelle, the jack o'lantern mushroom is poisonous. While not lethal, consuming this mushroom leads to very severe cramps, vomiting, and diarrhea.
Unlike chanterelles, the jack-o'-lantern mushroom has true gills (rather than ridges) and it can have olive coloration that chanterelles lack; also, Omphalotus species are saprotrophic, grow directly on wood, and are bioluminescent.
- Michael Wood & Fred Stevens. "Omphalotus olivascens". California Fungi. http://www.mykoweb.com/CAF/species/Omphalotus_olivascens.html. Retrieved 2011-03-25.
- Moreno, G.; Esteve-Raventós, F.; Pöder, R.; Ayala, N. (1993). "Omphalotus olivascens var. indigo, var.nov. from Baja California (Mexico)". Mycotaxon 48: 217–22.
- Kirchmair M, Morandell S, Stolz D, Pöder R (2004) Phylogeny of the genus Omphalotus based on nuclear ribosomal DNA-sequences. Mycologia 96 1253-1260
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