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

Mosaic puffball
Calvatia utriformis
📊 Comparing characteristics
| Characteristic | Common puffball | 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
June – November
Mosaic puffball
Fruiting season
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
Mosaic puffball
👀 Similar mushrooms — don't mix them up!
Stump puffball
EdiblePestle puffball
EdibleDune stinkhorn
EdibleCommon stinkhorn
EdibleMosaic puffball
EdibleMeadow puffball
EdibleCommon earthball
PoisonousUmber-brown puffball
InedibleLycoperdon mammiforme
EdibleFen puffball
EdibleBrown puffball
EdibleRhizopogon obtectus
EdibleMany-rooted earthball
InedibleGiant puffball
EdibleCommon puffball
Edible❓ Frequently asked questions
Can Common puffball and Mosaic puffball be mixed up?
How to tell Common puffball from Mosaic puffball?
Is Mosaic puffball edible?
When do Common puffball and Mosaic puffball grow?
Sources
- [1]Вікіпедія (українська)
- [2]Атлас грибів України, Зеров Д.К. (1979)
- [3]MycoBank Database
- [4]Index Fungorum
- [5]GBIF
- [6]iNaturalist Ukraine