Asterophoroa lycopodoides, a Mushroom Parasitic on Mushrooms
This is one of two species of [i]Asterophora[/i] parasitic in mushrooms, mainly on [i]Russula [/i] species.
The lumpy, rock-like background is the decaying cap of the host. The brown, tree trunk-like structure is the stem of the host.
The stereos are crosseye.
Olympus EM-1, (aperture priority), Olympus 4/3 50mm f2 macro, 1/50 at f11 ISO 1000, hand-held.