Psathyrella piluliformis

It produces fruit bodies (mushrooms) with broadly convex caps measuring 2–5 cm (3⁄4–2 inches) in diameter.

[2] The caps are chestnut to reddish brown, the color fading with age and with dry weather.

[2] Fragments of the partial veil may remain on the cap margin, and as a wispy band of hairs on the stipe.

[2] The stipe is 2–7 cm tall and 3–7 mm wide, white, smooth, hollow, and bulging at the base.

[4] Similar species include Psathyrella carbonicola, P. longipes, P. longistriata, P. multipedata, P. spadicea, and Parasola conopilus.