''Agaricus diminutivus'', commonly known as the diminutive agaricus, is a species of mushroom in the genus ''

Agaricus ''Agaricus'' is a genus of mushroom-forming fungi containing both edible and poisonous species, with over 400 members worldwide and possibly again as many disputed or newly discovered species. The genus includes the common ("button") mushroom ...

''. It is unique among its genus due to its small size, and was first described in 1873.

Description

The cap of ''Agaricus diminutivus'' is about 1-3 centimeters in diameter. It starts out round or ovoid, becoming convex or flat. It is pale, often being whitish or tannish. The stipe is 2-6 centimeters long and 3-10 millimeters wide, with a ring around it that sometimes disappears. The gills are free, and start out a pale pinkish tan color becoming pink and finally brown. The mushroom's flesh both bruises slightly yellow and turns yellow when potassium hydroxide (KOH) is applied. The spore print is brown. While likely edible, this mushroom is not recommended as food because it can be confused with poisonous ''

Inocybe ''Inocybe'' is a genus of mushroom-forming fungi, with over 1,000 species. Its members are mycorrhizal, and some evidence shows that the high degree of speciation is due to adaptation to different trees and possibly also local habitats. Taxonomy ...

'' species. It is also very small and not very common. ''Agaricus diminutivus'' is actually a species complex, consisting of multiple closely related species that are difficult to distinguish from one another.

Habitat and ecology

''Agaricus diminutivus'' grows in forests, especially under conifers. It fruits during autumn.

References

{{Taxonbar, from=Q107471708 diminutivus Fungus species