How to identify Spiny Puffball

To correctly identify Spiny Puffball (Lycoperdon echinatum), 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.

   Not a true cap; the entire fruiting body is the peridium. The outer peridium (exoperidium) is covered in the characteristic spines. The inner peridium (endoperidium) is thin and papery, eventually rupturing at the apex to release spores.

2. 2

   Gills

   Attachment to stem, color, and spacing.

   Absent, as this is a gasteromycete (puffball). Spores are produced internally within the gleba.

3. 3

   Stem

   Length, shape, surface, and any ring.

   No true stem. It is attached to the substrate by a small, cord-like mycelial strand. A sterile base (subgleba) is present, which is distinct from the spore-bearing upper part.

4. 4

   Flesh

   Color, texture, and bruising reaction.

   When young and edible, the gleba (interior flesh) is firm, homogeneous, and pure white. As it matures, it turns yellowish, then olive-brown, and finally a dark brown, powdery mass of spores. The sterile base (subgleba) is typically white and cellular.

5. 5

   Fruiting body

   Overall growth pattern.

   Globose to pear-shaped, 1-6 cm in diameter, covered with prominent, conical, often star-shaped spines that are typically joined at their tips. These spines are initially white, becoming brownish with age, and eventually fall off, leaving a distinctive net-like or reticulate pattern on the surface. A small, sterile base (subgleba) is usually present.

6. 6

   Habitat

   Where it grows and on what substrate.

   Typically found growing scattered or in groups on the ground in deciduous or mixed woodlands, often among leaf litter or on decaying wood. It prefers rich, humusy soil.

Key Facts

Cap surfaces

Covered with prominent, conical, often star-shaped spines that fall off with age, leaving a reticulate pattern.

Growth Form

Solitary, scattered, or in small groups.

Spore Print

Olive-brown to dark brown (powdery mass)

Body color

White to cream when young, becoming brownish with age.

Odor

Mild, pleasant, mushroomy.

Flesh bruises

Does not bruise significantly; interior remains white until maturation.

Height

1-6 cm

Cap Diameter

1-6 cm

Fruit body characteristics

• Gill attachment: Not applicable (gills absent)
• Stem shape: Not applicable (no true stem)
• Stem surface: Not applicable (no true stem)
• Ring: Absent
• Stem cross-section: Not applicable (no true stem)

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