Sarcodon imbricatus

Sarcodon imbricatus, commonly known as the shingled hedgehog or scaly hedgehog, is a species of tooth fungus in the order Thelephorales. The mushroom has a large, brownish cap with large brown scales and may reach 30 cm (12 in) in diameter. On the underside it sports greyish, brittle teeth instead of gills, and has white flesh. Its spore print is brown. It ranges throughout Europe and North America, while collections from the British Isles are now assigned to Sarcodon squamosus. It appears in autumn and is associated with spruce (Picea). The mushroom is edible, but it may be bitter and possibly causes gastrointestinal upset....read more on Wikipedia.