Toadstools are fungus-like creatures that inhabit the realms of Silent Hill 4: The Room. They are stationary and pose little threat.
Toadstools are tall, slender, and they bulge out at the top of their stems, often equaling Henry Townshend's height. The red-brown color of the fungus terminates in a fleshy patch and sometimes take the shape of a human head locked in a scream.
Another nearly-identical variety of the Toadstools are called Whitestools. They function in the same manner as the Toadstool, differing only in that Whitestools are usually in tighter groups. They are white and tentacle-like and terminate in snake-like heads or hands.
They grow out of the ground to obstruct Henry's path, though he can easily destroy them with a melee weapon to clear the way. They only do minor damage when Henry walks into them, and they themselves are destroyed in the process. Both variants are often seen growing out of corpses.
These fungi represent what they are: fungi. Like fungi present in our own world, they are signs of decay and death. Their shape is also reminiscent of an umbilical cord, with a fetus growing at the terminus. Also like a fungus, Walter Sullivan views umbilical cords as leeching nutrients from that to which they are attached.