Bear’s Head Tooth Fungus

Bear's Head, Lion's Mane, Satyr's Beard, Monkey's Head.

Hericium americanum

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The Bear’s Head Tooth Fungus is a distinctive and fascinating fungi characterized by its cascading, icicle-like spines from which the spores are released. Its appearance is somewhat reminiscent of the mane of a white bear, giving rise to its common name.

Bear’s Head Tooth Fungus

Common Name
Bear’s Head Tooth Fungus

Other Names

Bear’s Head, Lion’s Mane, Satyr’s Beard, Monkey’s Head.

Latin Name

Hericium americanum


Predominantly in North America, especially in the eastern parts of the continent. They are commonly found on hardwood trees, particularly on oak and beech.


This mushroom has no traditional cap. Instead, it features cascading white spines or teeth which hang down, giving it its unique appearance. These teeth turn yellow-brown with age.


The fruiting body can range between 10 to 30 cm across.


Found on dead or dying hardwood trees, especially on wounds or broken branches.


Saprophytic; decomposes wood.


Like other fungi, it starts as spores that germinate to form mycelium. The mycelium then forms the fruiting body with its distinctive spines. As the spines mature, they release more spores to propagate the fungus.

Defense Mechanisms

Its appearance, growing on high branches or wounds on trees, makes it less accessible to many potential predators. Furthermore, its unique texture may not be appealing to some herbivores.

Ecological Importance

The Bear’s Head Tooth Fungus helps in the decomposition of wood, contributing to the nutrient cycling in the ecosystems where they are found.

Conservation Status

Not specifically listed as endangered, but like all fungi, habitat loss and changes can impact populations.
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