| Cortinarius orellanus | |
|---|---|
| |
Scientific classification 
| |
| Domain: | Eukaryota |
| Kingdom: | Fungi |
| Division: | Basidiomycota |
| Class: | Agaricomycetes |
| Order: | Agaricales |
| Family: | Cortinariaceae |
| Genus: | Cortinarius |
| Species: | C. orellanus
|
| Binomial name | |
| Cortinarius orellanus Fries, 1838
| |
| Synonyms | |
Cortinarius orellanus | |
|---|---|
 | Gills on hymenium |
 | Cap is flat |
 | Hymenium is adnate |
 | Stipe has a ring |
 | Spore print is reddish-brown |
 | Ecology is mycorrhizal |
 | Edibility is deadly |
Cortinarius orellanus, commonly known as the fool's webcap or fools webcap, is a species of deadly fungus in the family Cortinariaceae native to Europe. Within the genus it belongs to a group known as the Orellani, all of which are highly toxic—eating them results in kidney failure, which is often irreversible. The mushroom is generally tan to brown all over.