Panaeolus semiovatus var. semiovatus
Species of fungus
From Wikipedia, the free encyclopedia
Panaeolus semiovatus var. semiovatus, also known as P. semiovatus and Anellaria separata, and commonly known as the ringed panaeolus,[1][a] is a medium-sized buff-colored mushroom with black spores that grows on dung.
| Panaeolus semiovatus var. semiovatus | |
|---|---|
| |
Scientific classification  | |
| Kingdom: | Fungi |
| Division: | Basidiomycota |
| Class: | Agaricomycetes |
| Order: | Agaricales |
| Family: | Bolbitiaceae |
| Genus: | Panaeolus |
| Species: | |
| Variety: | P. s. var. semiovatus |
| Trinomial name | |
| Panaeolus semiovatus var. semiovatus Fr. (Lundell) | |
| Synonyms | |
| |
| Panaeolus semiovatus var. semiovatus | |
|---|---|
| Mycological characteristics | |
 | Gills on hymenium |
 | Cap is ovate |
 | Hymenium is adnexed |
 | Stipe has a ring |
 | Spore print is black |
 | Ecology is saprotrophic |
 | Edibility is inedible |
Description
The cap is up to 9 centimetres (3+1⁄2 in) across, light tan then buff to whitish. It is oval then conical or parabolic.[1] It is sticky when wet and often wrinkles when dry. The stem is up to 18 cm (7 in) long and 12 mm thick,[1] solid and smooth, with an annulus (ring) that is white, but often blackened by falling spores. The gills are adnexed, being wider in the middle, and narrowing at both ends; they are brown to black. The flesh is white, or straw-colored.[2][3] The spore print is black.[1]
Wild Panaeolus semiovatus var. semiovatus
P. semiovatus var. semiovatus on horse manure
Close up of cap and gills with black spores
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Similar species
The very similar P. semiovatus var. phalaenarum (Fr.) Ew. Gerhardt. 1996 syn. P. phalaenarum (Bull.) Quel. is more slender (cap 2–4 cm) and lacks the ring.[4]
Habitat and distribution
The species grows on horse dung.[1] It is widely distributed and is present in many temperate zones of the world.
Edibility
Though nonpoisonous,[5] it is generally regarded as inedible and possessing a rather abysmal taste.[6] It has been unreliably rumored to contain the indole alkaloid psilocybin.[1] Some people experience gastric upset after consumption.[citation needed]
