The Nastiest Mushroom Ever Grows in MaineStinkhorn mushrooms are among the strangest fungi you'll find in Maine. They also say,"Unlike typical mushrooms, which depend on wind to distribute their spores, the stinkhorn uses insects. What really makes a stinkhorn famous, though, is its smell. Stinkhorn mushrooms aren't harmful to your lawn, and they usually disappear on their own after a day or two. As bizarre as they are, stinkhorn mushrooms are a reminder that nature has a sense of humor.