Panaeolina foenisecii is a species of mushroom that typically grows in grassy areas and is commonly known as the brown hay mushroom. The cap is brown and can grow up to 2.5 cm (1 inch) in diameter, while the stem is typically 5 cm (2 inches) tall and 1-2 mm (0.04-0.08 inches) thick. It is a saprotrophic species, meaning it feeds on decaying organic matter.