About Panaeolus semiovatus (Sowerby) S.Lundell & Nannf.
The cap of Panaeolus semiovatus can reach up to 9 centimetres (3+1⁄2 inches) across. It starts light tan, and ages to buff or whitish, changing shape from oval to conical or parabolic. The cap surface is sticky when wet, and often becomes wrinkled when dry. The stem grows up to 18 cm (7 in) long and 12 mm thick, and is solid and smooth. It bears a white annulus (ring), which is often stained black by falling spores. The gills are adnexed, meaning they are wider in the middle and narrower at both ends, and their color ranges from brown to black. The flesh is either white or straw-colored, and this species produces a black spore print. This mushroom grows on horse dung. It is widely distributed across many temperate zones of the world.
