Hericium erinaceus

Hericium erinaceus (also called Lion's Mane Mushroom, Bearded Tooth Mushroom, Hedgehog Mushroom, Bearded Hedgehog Mushroom, pom pom mushroom, or Bearded Tooth Fungus) is an edible mushroom in the tooth fungus group. It can be identified by its tendency to grow all the spines out from one group (rather than branches), long spines (greater than 1 cm length) and its appearance on hardwoods. Hericium erinaceus can be mistaken for three other species of Hericium which also grow in North America, all of which are popular edibles. In the wild, these mushrooms are common during late summer and fall on dead hardwoods, particularly American Beech.
Hericium erinaceus is a choice edible when young, and the texture of the cooked mushroom is often compared to seafood. This mushroom is cultivated commercially on logs or sterilized sawdust. It is available fresh or dried in Asian grocery stores.