Protostropharia semiglobata

Protostropharia semiglobata
Growing on llama dung in South America
Scientific classification
Domain: Eukaryota
Kingdom: Fungi
Division: Basidiomycota
Class: Agaricomycetes
Order: Agaricales
Family: Strophariaceae
Genus: Protostropharia
Species:
P. semiglobata
Binomial name
Protostropharia semiglobata
(Batsch) Redhead, Moncalvo & Vilgays (2013)
Synonyms
  • Agaricus semiglobatus Batsch (1786)
  • Agaricus nitens Bull. (1792)
  • Coprinus semiglobatus (Batsch) Gray (1821)
  • Stropharia semiglobata (Batsch) Quél. (1872)
  • Geophila semiglobata (Batsch) Quél. (1886)
  • Psalliota semiglobata (Batsch) P.Kumm. (1871)
  • Fungus semiglobatus (Batsch) Kuntze (1898)
  • Psilocybe semiglobata (Batsch) Noordel. (1995)
Protostropharia semiglobata
Gills on hymenium
Cap is convex
Hymenium is adnate
Stipe has a ring
Spore print is purple-black
Ecology is saprotrophic
Edibility is edible, but unpalatable

Protostropharia semiglobata, commonly known as the hemispherical stropharia, the dung roundhead, or the halfglobe mushroom, is an agaric fungus of the family Strophariaceae. The mushrooms have hemispherical straw yellow to buff-tan caps measuring 1–4 cm (0.4–1.6 in), greyish gills that become dark brown in age, and a slender, smooth stem 3–12 cm (1.2–4.7 in) long with a fragile ring.

A common and widespread species with a cosmopolitan distribution, the fungus produces mushrooms on the dung of various wild and domesticated herbivores. Accounts differ as to whether it is edible or perhaps poisonous.