How to identify Tylopilus felleus

To correctly identify Tylopilus felleus (Tylopilus felleus), 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.

   The cap is typically convex, 5–15 cm (2–6 in) in diameter, and varies in color from pale tan to dark brown. The surface is smooth and dry, and often has a velvety texture when young.

2. 2

   Gills

   Attachment to stem, color, and spacing.

   The pore surface is white when young, but turns pinkish as the mushroom matures. The pores are small and round.

3. 3

   Stem

   Length, shape, surface, and any ring.

   The stem is stout, 5–10 cm (2–4 in) long, and 1–3 cm (0.4–1.2 in) thick. It is typically the same color as the cap, and has a prominent network of raised ridges (reticulation) near the top.

4. 4

   Flesh

   Color, texture, and bruising reaction.

   The flesh is white, but turns pinkish when cut or bruised. It has a very bitter taste.

5. 5

   Fruiting body

   Overall growth pattern.

   The fruit body is a mushroom with a cap and a stem. The cap is typically convex, and the stem is stout and central.

6. 6

   Habitat

   Where it grows and on what substrate.

   Tylopilus felleus is found in coniferous and deciduous forests, typically in late summer and autumn. It is a mycorrhizal fungus, forming a symbiotic relationship with the roots of trees.

Key Facts

Cap surfaces

Dry, velvety when young.

Growth Form

Solitary or scattered.

Spore Print

Pinkish-brown.

Body color

Tan to dark brown.

Odor

Not distinctive.

Flesh bruises

Pinkish.

Height

5-10 cm

Cap Diameter

5-15 cm

Fruit body characteristics

• Gill attachment: Pores.
• Stem shape: Equal or club-shaped.
• Stem surface: Reticulated (netted) near the top.
• Ring: Absent.
• Stem cross-section: Solid.

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