How to identify Spring Agaric

To correctly identify Spring Agaric (Agaricus vernalis), 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.

   Initially convex, flattening with age, usually 5-10 cm in diameter, surface often slightly fibrous.

2. 2

   Gills

   Attachment to stem, color, and spacing.

   Free from the stem, initially pinkish, turning dark chocolate brown at maturity.

3. 3

   Stem

   Length, shape, surface, and any ring.

   Sturdy, white, with a persistent membranous ring (annulus) located on the upper part of the stipe.

4. 4

   Flesh

   Color, texture, and bruising reaction.

   White, may show slight yellowing or browning when cut.

5. 5

   Fruiting body

   Overall growth pattern.

   Medium-sized mushroom with a whitish to pale brownish cap.

6. 6

   Habitat

   Where it grows and on what substrate.

   Often found in grassy areas, fields, and near the edges of deciduous woodlands during the spring months.

Key Facts

Cap surfaces

Smooth to slightly fibrous

Growth Form

Solitary or in small groups

Spore Print

Chocolate brown

Body color

White/Off-white

Odor

Mildly aromatic

Flesh bruises

Often yellowing upon handling

Height

6-12 cm

Cap Diameter

5-10 cm

Fruit body characteristics

• Gill attachment: Free
• Stem shape: Cylindrical
• Stem surface: Smooth
• Ring: Present, membranous
• Stem cross-section: Solid

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