How to identify Bear's Head Tooth

To correctly identify Bear's Head Tooth (Hericium americanum), check each of these features in order. Misidentification is the most common cause of mushroom poisoning, so cross-reference multiple sources.

Step-by-step identification

1. 1

   Cap

   Shape, color, surface texture, and diameter.

   Hericium americanum does not have a distinct cap in the traditional sense. Instead, the fruiting body is a complex arrangement of branches from which the spines emerge. These branches can be thick and somewhat flattened, giving the impression of a 'body' from which the teeth hang.

2. 2

   Gills

   Attachment to stem, color, and spacing.

   This mushroom does not have gills. Its hymenium (spore-bearing surface) consists of the characteristic long, pendulous spines or 'teeth'.

3. 3

   Stem

   Length, shape, surface, and any ring.

   There is no distinct stem. The fruiting body attaches directly to the wood substrate, often with a short, stout, and indistinct base that merges into the branched structure.

4. 4

   Flesh

   Color, texture, and bruising reaction.

   The flesh is white, firm, and somewhat fibrous when young, becoming softer and more brittle with age. It has a mild, slightly sweet, and sometimes seafood-like aroma.

5. 5

   Fruiting body

   Overall growth pattern.

   The fruiting body is typically a large, irregularly shaped mass, often appearing as a single, branched structure or multiple fused branches. It is composed of numerous long, soft, downward-pointing spines. The overall color is white to creamy white, sometimes yellowing with age or bruising.

6. 6

   Habitat

   Where it grows and on what substrate.

   Saprotrophic or weakly parasitic on dead or dying hardwood trees, particularly oak, maple, beech, and birch. It typically grows on logs, stumps, or standing dead trees, and occasionally on living trees where there is a wound or decay.

Key Facts

Cap surfaces

Not applicable (no true cap); fruiting body covered in spines.

Growth Form

Branched, with long, pendulous spines (teeth) emerging from branches.

Spore Print

White.

Body color

White to creamy white, yellowing with age.

Odor

Mild, pleasant, sometimes slightly seafood-like.

Flesh bruises

May bruise yellowish or brownish with handling or age.

Height

Can be quite large, up to 30 cm (12 inches) or more across.

Cap Diameter

Not applicable (no true cap); overall fruiting body diameter can be 10-30 cm (4-12 inches) or more.

Fruit body characteristics

• Gill attachment: Not applicable (no gills).
• Stem shape: Not applicable (no distinct stem).
• Stem surface: Not applicable (no distinct stem).
• Ring: Absent.
• Stem cross-section: Not applicable (no distinct stem).

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