Hericium erinaceus

Hericium erinaceus, commonly known as lion's mane, yamabushitake, bearded tooth fungus, or bearded hedgehog, is a species of tooth fungus. It tends to grow in a single clump with dangling spines longer than 1 centimetre (1⁄2 inch). It can be mistaken for other Hericium species that grow in the same areas.

Native to North America and Eurasia, the mushrooms are common during late summer and autumn on hardwoods, particularly American beech and maple. It is typically considered saprophytic, as it mostly feeds on dead trees. It can also be found on living trees, usually in association with a wound.

It is a choice edible mushroom and is used in traditional Chinese medicine, although its alleged medicinal benefits are not reliably proven.