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Common puffball or Mosaic puffball

How they differ, how to recognize them and which is more dangerous — a mushroom comparison

The short answer

Common puffball and Mosaic puffball are similar species that can be mixed up while foraging. The main visible difference: size: Common puffball — small (up to 5 cm), Mosaic puffball — large (over 15 cm). The mushrooms also differ in the following features: substrate.

Common puffball (Lycoperdon perlatum)

Common puffball

Lycoperdon perlatum

EdibleExpert-verified
Mosaic puffball (Calvatia utriformis)

Mosaic puffball

Calvatia utriformis

EdibleExpert-verified

📊 Comparing characteristics

Comparison of characteristics: Common puffball and Mosaic puffball
Edibility class

Common puffball

Edible

Mosaic puffball

Edible
Season

Common puffball

SummerAutumn

Mosaic puffball

SummerAutumn
Use

Common puffball

Cook freshDryingPickling

Mosaic puffball

Cook freshDryingPickling
Size

Common puffball

Small (up to 5 cm)

Mosaic puffball

Large (over 15 cm)
Cap color

Common puffball

WhiteCreamBrown

Mosaic puffball

WhiteCreamBrown
Cap shape

Common puffball

Irregular

Mosaic puffball

Irregular
Cap surface

Common puffball

Scaly

Mosaic puffball

Scaly
Taste

Common puffball

Mild

Mosaic puffball

Mild
Smell

Common puffball

Pleasant

Mosaic puffball

Pleasant
Flesh color change

Common puffball

Yellowing

Mosaic puffball

Yellowing
Hymenophore

Common puffball

Chambered

Mosaic puffball

Chambered
Stem

Common puffball

Central

Mosaic puffball

Central
Ring (veil)

Common puffball

No ring

Mosaic puffball

No ring
Volva

Common puffball

No volva

Mosaic puffball

No volva
Substrate

Common puffball

SoilForest litter

Mosaic puffball

Soil
Nutrition type

Common puffball

Saprotroph

Mosaic puffball

Saprotroph

📅 Seasonality

Common puffball

Fruiting season

Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec

June – November

Mosaic puffball

Fruiting season

Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec

July – October

🔬 Morphology

Cap

Common puffball

The fruiting body is inverted pear-shaped or club-shaped, 2-6 cm tall, 1.5-4 cm wide at the top. The upper (fertile) part is a rounded head; the lower (sterile) part is a narrowed “stalk” 1-3 cm long. Color: young ones are white or cream; with age yellowish grey to brown. A telltale feature — the surface is covered in coarse spiny warts (1-2 mm) that gradually fall off, leaving a net-like trace.

Mosaic puffball

The fruiting body is round, sac-shaped or upside-down pear-shaped, 5-15 cm tall and 4-12 cm wide. Young ones are smooth or finely downy; with age coarser scales appear and the skin peels off in patches. Color: young ones are white, later cream, then grayish brown. In mature ones the top dies, exposing a brownish-gray spore mass.

Hymenophore

Common puffball

Internal hymenophore (gleba). The young gleba is white, dense and uniform. With age it turns yellow, then green, and becomes a dark olive-grey powdery spore mass. At the top of a mature fruiting body an opening forms, through which the spores puff out when a raindrop hits (hence the Ukrainian name, “rain mushroom”). Spore print dark olive-brown.

Mosaic puffball

The hymenophore is internal (gleba). The young gleba is white, dense and uniform, with no visible chambers or structures. With age it turns yellow, then green, then becomes a dark olive-gray powdery mass of spores. Spore print dark olive-gray to brown.

Stem

Common puffball

There is no separate stem — the fruiting body is all one piece. The lower sterile part is a “stalk-base” 1-3 cm tall, somewhat narrower than the top, white and scaly, passing into whitish rhizomorphs (mycelial cords) in the soil.

Mosaic puffball

There is no separate stem — the fruiting body is one piece. At the bottom there is a short sterile “stalk-base” 2-4 cm high, noticeably narrower than the top, white, scaly in old ones. There is no ring.

Flesh

Common puffball

The flesh of young ones is pure white, uniform, dense, with a delicate pleasant flavor. With age it turns yellow, then green, and becomes a spore mass. The test: cut it open: uniform white = good to eat; any other color = throw it out.

Mosaic puffball

The flesh in young ones is white, uniform and firm, with a delicate mild taste. With age it turns yellow, then green, and becomes a spore mass. Check before cooking: if the cut shows uniform white — it's good; any yellowish or greenish tint — throw it out.

Smell

Common puffball

Faint, pleasant mushroomy smell with no sharp notes. Taste mild and neutral — it takes on the flavors of the dish.

Mosaic puffball

A faint, pleasant mushroomy smell. The taste is mild and delicate, nothing distinctive.

📍 Habitats

Common puffball

Deciduous forestMixed forestConifer forest

Mosaic puffball

Deciduous forestMixed forest

👀 Similar mushrooms — don't mix them up!

❓ Frequently asked questions

Can Common puffball and Mosaic puffball be mixed up?
Yes, they look so similar that people often mix them up. The size, substrate help tell them apart.
How to tell Common puffball from Mosaic puffball?
The main differences: size: Common puffball — small (up to 5 cm), Mosaic puffball — large (over 15 cm); substrate: Common puffball — soil, forest litter, Mosaic puffball — soil. The full table of characteristics is higher up on this page.
Is Mosaic puffball edible?
Mosaic puffball — edible.
When do Common puffball and Mosaic puffball grow?
Common puffball — June–November; Mosaic puffball — July–October.

Sources

  • [1]Вікіпедія (українська)
  • [2]Атлас грибів України, Зеров Д.К. (1979)
  • [3]MycoBank Database
  • [4]Index Fungorum
  • [5]GBIF
  • [6]iNaturalist Ukraine