Agaricus diminutivus

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.^[2] The stipe is 2-6 centimeters long and 3-10 millimeters wide, with a ring around it that sometimes disappears.^[1] 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.^[2] The spore print is brown.^[1]

While likely edible, this mushroom is not recommended as food because it can be confused with poisonous Inocybe species.^[1][4] It is also very small and not very common.^[2][3]

Agaricus diminutivus is actually a species complex, consisting of multiple closely related species that are difficult to distinguish from one another.^[1][2]

Agaricus diminutivus grows in forests, especially under conifers. It fruits during autumn.^[2]