How to identify Shaggy Ink Cap

To correctly identify Shaggy Ink Cap (Coprinus comatus), 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 cylindrical to oval, typically 5-20 cm in height and 2-5 cm in diameter. It is white when young and covered with shaggy, upturned scales, giving it a distinctive appearance. As the mushroom matures, the cap edges begin to turn black and dissolve into an inky liquid, a process known as deliquescence.

2. 2

   Gills

   Attachment to stem, color, and spacing.

   The gills are crowded, free from the stem, and white when young. As the mushroom matures, the gills turn pink, then black, and eventually dissolve into an inky fluid, starting from the bottom edge of the cap and moving upwards.

3. 3

   Stem

   Length, shape, surface, and any ring.

   The stem is typically 5-20 cm long and 1-2 cm thick, white, hollow, and smooth. It is often slightly enlarged at the base. A fragile, movable ring may be present on the stem, but it often disappears as the mushroom matures.

4. 4

   Flesh

   Color, texture, and bruising reaction.

   The flesh is white and thin. It is relatively soft when young but quickly deteriorates as the mushroom ages and deliquesces.

5. 5

   Fruiting body

   Overall growth pattern.

   The fruiting body of Coprinus comatus is initially cylindrical and elongated, resembling a closed umbrella. As it matures, the cap expands slightly but retains its cylindrical shape. The entire mushroom is typically white when young, with a shaggy or scaly texture on the cap surface.

6. 6

   Habitat

   Where it grows and on what substrate.

   Coprinus comatus is commonly found in grassy areas, lawns, parks, and disturbed ground. It often grows in groups or clusters and can appear in both urban and rural environments. It is frequently seen along roadsides and in areas with rich soil.

Key Facts

Cap surfaces

Shaggy, scaly

Growth Form

Solitary or in groups

Spore Print

Black

Body color

White, turning black

Odor

Mild

Flesh bruises

Does not bruise

Height

5-20 cm

Cap Diameter

2-5 cm

Fruit body characteristics

• Gill attachment: Free
• Stem shape: Cylindrical
• Stem surface: Smooth
• Ring: Fragile, movable
• Stem cross-section: Hollow

Explore Shaggy Ink Cap