How to identify Cyclocybe aegerita

To correctly identify Cyclocybe aegerita (Cyclocybe aegerita), 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 convex to flattened, 3-10 cm in diameter, and has a smooth, dry surface. The color ranges from light tan to brown, often paler at the margin.

2. 2

   Gills

   Attachment to stem, color, and spacing.

   The gills are white to cream, closely spaced, and adnate to slightly decurrent.

3. 3

   Stem

   Length, shape, surface, and any ring.

   The stem is cylindrical, 3-8 cm long, and 1-2 cm thick. It is white to cream and has a smooth surface. A ring may be present, but it is often fragile and disappears with age.

4. 4

   Flesh

   Color, texture, and bruising reaction.

   White, firm, and does not change color when cut.

5. 5

   Fruiting body

   Overall growth pattern.

   Grows in clusters on wood.

6. 6

   Habitat

   Where it grows and on what substrate.

   Grows on dead or dying hardwood trees, especially poplar, willow, and elm.

Key Facts

Cap surfaces

Smooth, dry

Growth Form

Clustered

Spore Print

Brown

Body color

White to cream

Odor

Pleasant, mushroomy

Flesh bruises

No bruising

Height

3-8 cm

Cap Diameter

3-10 cm

Fruit body characteristics

• Gill attachment: Adnate to slightly decurrent
• Stem shape: Cylindrical
• Stem surface: Smooth
• Ring: Present, but may be fragile and disappear with age
• Stem cross-section: Solid

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