Panaeolus africanus

Panaeolus africanus is a little brown mushroom which contains small amounts of the hallucinogen psilocybin.

Description
This is a little brown mushroom that grows on hippopotamus and elephant dung and has black spores. The cap is up to 2 cm across, gray, conic, often with scaly cracks. The stem is 4 cm by 5 mm, pruinose at the top.