Mycena rorida, commonly known as the dripping bonnet or the slippery mycena, is a species of mushroom. It is whitish or dirty yellow in color, with a broad convex cap 5-15mm in diameter. The stalk is covered with a thick, slippery slime layer. This species can be bioluminescent, and is one of the several causative species of foxfire. The current, accepted name for this species is Roridomyces roridus.