How to identify Bronze Bolete

To correctly identify Bronze Bolete (Boletus aereus), 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 dark brown to blackish-brown, often with a slightly wrinkled or bumpy texture. It is typically convex when young, flattening out with age. The surface is dry and not sticky.

2. 2

   Gills

   Attachment to stem, color, and spacing.

   N/A (boletes have pores instead of gills). The pore surface is initially whitish, turning yellowish to greenish-yellow with age. The pores are small and round.

3. 3

   Stem

   Length, shape, surface, and any ring.

   The stem is stout and club-shaped to cylindrical, often with a slightly bulbous base. It is typically brown, similar in color to the cap or slightly lighter. The stem surface can be smooth or slightly reticulated (covered with a net-like pattern).

4. 4

   Flesh

   Color, texture, and bruising reaction.

   The flesh is firm and white, sometimes with a brownish tinge under the cap cuticle. It usually does not change color when cut, or may turn slightly blue in some instances.

5. 5

   Fruiting body

   Overall growth pattern.

   Overall, the mushroom is large and robust, with a substantial cap and thick stem. The color is predominantly dark brown, and the pores are typically whitish when young, turning yellowish to greenish with age.

6. 6

   Habitat

   Where it grows and on what substrate.

   Found in broadleaf forests, particularly associated with oak and beech trees. Prefers warm climates and well-drained soils.

Key Facts

Cap surfaces

Dry, slightly wrinkled or bumpy

Growth Form

Solitary or scattered

Spore Print

Olive-brown

Body color

Dark brown to blackish-brown

Odor

Pleasant, mushroomy

Flesh bruises

Usually does not change color, or may turn slightly blue

Height

10-20 cm

Cap Diameter

10-30 cm

Fruit body characteristics

• Gill attachment: N/A (boletes have pores instead of gills)
• Stem shape: Club-shaped to cylindrical
• Stem surface: Smooth to slightly reticulated (net-like pattern)
• Ring: Absent
• Stem cross-section: Solid

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