Leucocoprinus fragilissimus

Leucocoprinus fragilissimus, commonly known as the fragile dapperling, is a species of gilled mushroom in the family Agaricaceae.
Taxonomy.
The species was first documented by French mycologist Narcisse Théophile Patouillard in 1900.
Description.
The cap of the fruit body is up to wide, bell-shaped when young and growing to convex in maturity. It has a pale yellow colour that fades with age, and white gills. The narrow stalk is between 1 and 3 mm thick and very fragile.
Similar species.
"Leucocoprinus magnicystidiosus" is a similar mushroom, with a darker disc and larger cheilocystidia.
Habitat and distribution.
Like all "Leucocoprinus" species, "L. fragilissimus" is a saprotroph, living on very decayed plant matter (humus or compost). It grows solitarily or sparsely in wooded areas. The species is found in southern North America, South America, southern Europe, Africa, southern and eastern Asia, Australia, and New Zealand.
Toxicity and chemistry.
The toxicity of this mushroom is unknown.