Hydnum repandum, commonly known as the
sweet tooth,
wood hedgehog or
hedgehog mushroom, is an edible mushroom with no poisonous lookalikes. A
basidiomycete fungus of the family
Hydnaceae, it is the
type species of the genus
Hydnum. The fungus produces
fruit bodies (mushrooms) that are characterized by their
spore-bearing structures—in the form of spines rather than
gills—which hang down from the underside of the
cap. The cap is dry, colored yellow to light orange to brown, and often develops an irregular shape, especially when it has grown closely crowded with adjacent fruit bodies. The
mushroom tissue is white with a pleasant odor and a spicy or bitter taste. All parts of the mushroom stain orange with age or when bruised.