| Conocybe rugosa | |
|---|---|
|   | |
| Scientific classification   | |
| Kingdom: | Fungi | 
| Division: | Basidiomycota | 
| Class: | Agaricomycetes | 
| Order: | Agaricales | 
| Family: | Bolbitiaceae | 
| Genus: | Conocybe | 
| Species: | C. rugosa | 
| Binomial name | |
| Conocybe rugosa | |
| Synonyms [1] | |
| 
 | |
| Conocybe rugosa | |
|---|---|
|  | Gills on hymenium | 
|   | Cap is conical or flat | 
|  | Hymenium is adnexed | 
|  | Stipe has a ring | 
|   | Spore print is brown to reddish-brown | 
|  | Ecology is saprotrophic | 
|  | Edibility is deadly | 
Conocybe rugosa is a common and highly toxic species of mushroom that is widely distributed in Eurasia and North America.
The species was originally described in the genus Pholiotina , and its morphology and a 2013 molecular phylogenetics study supported its continued classification there. [2]
Conocybe rugosa has a conical cap that expands to flat, usually with an umbo. It is less than 3 cm across, has a smooth brown top, and the margin is often striate. The gills are rusty brown, close, and adnexed. The stalk is 2 mm thick and 1 to 6 cm long, smooth, and brown, with a prominent and movable ring. The spores are rusty brown, and it may be difficult to identify the species without a microscope. [3]
The species grows in woodchips, flowerbeds and compost piles. [4] [5] It has been found in Europe, Asia and North America. [4] [5] It is especially common in the Pacific Northwest.
This species is deadly poisonous, [6] the fruiting bodies containing alpha-amanitin, a cyclic peptide that is highly toxic to the liver and is responsible for many deaths by poisoning from mushrooms in the genera Amanita and Lepiota . They are sometimes mistaken for species of the genus Psilocybe due to their similar-looking cap.