Shaggy ink cap or Common ink cap
How they differ, how to recognize them and which is more dangerous — a mushroom comparison
The short answer
Shaggy ink cap and Common ink cap are similar species: Shaggy ink cap is edible, while Common ink cap is conditionally edible. The main visible difference: cap color: Shaggy ink cap — white, cream, Common ink cap — grey, brown. The mushrooms also differ in the following features: cap shape, cap surface, ring (veil).

Shaggy ink cap
Coprinus comatus

Common ink cap
Coprinopsis atramentaria
📊 Comparing characteristics
| Characteristic | Shaggy ink cap | Common ink cap |
|---|---|---|
| Edibility class | Shaggy ink cap Edible | Common ink cap Conditionally edible |
| Season | Shaggy ink cap SpringSummerAutumn | Common ink cap SpringSummerAutumn |
| Use | Shaggy ink cap Cook fresh | Common ink cap Cook fresh |
| Size | Shaggy ink cap Medium (5–15 cm) | Common ink cap Medium (5–15 cm) |
| Cap color | Shaggy ink cap WhiteCream | Common ink cap GreyBrown |
| Cap shape | Shaggy ink cap Cylindrical | Common ink cap Conical |
| Cap surface | Shaggy ink cap Scaly | Common ink cap Fibrous |
| Taste | Shaggy ink cap Mild | Common ink cap Mild |
| Smell | Shaggy ink cap Pleasant | Common ink cap Pleasant |
| Flesh color change | Shaggy ink cap Darkens | Common ink cap Darkens |
| Hymenophore | Shaggy ink cap Gilled | Common ink cap Gilled |
| Stem | Shaggy ink cap Central | Common ink cap Central |
| Ring (veil) | Shaggy ink cap Ring present | Common ink cap No ring |
| Volva | Shaggy ink cap No volva | Common ink cap No volva |
| Substrate | Shaggy ink cap Soil | Common ink cap Soil |
| Nutrition type | Shaggy ink cap Saprotroph | Common ink cap Saprotroph |
📅 Seasonality
Shaggy ink cap
Fruiting season
May – November
Common ink cap
Fruiting season
May – November
🔬 Morphology
Cap
Shaggy ink cap
The cap is at first elongated and egg-shaped, 5-15 cm tall and 3-5 cm wide. With age it opens into a bell shape, then spreads out. Color white, with a cream or yellowish center, covered in distinctive upturned scales — soft and fluffy. In old fruit bodies the gill edges turn pink, then black. In the end the mushroom dissolves into a black liquid (autodigestion).
Common ink cap
The cap is at first egg-shaped or bell-shaped, 4-8 cm tall and 3-7 cm wide. It opens up with age. Color gray, gray-brown, sometimes with an olive tinge, darker in the center. The surface has distinctive radial ribs and grooves and small scales in the center. In old specimens it blackens and dissolves.
Hymenophore
Shaggy ink cap
Gilled hymenophore. Gills very crowded, thin, free (not touching the stem). The color changes with age: young ones are white, then turning pink, then black as the spores mature. Spore print black.
Common ink cap
Gilled hymenophore. Gills very crowded, thin, free. Color: young ones are white, then turning gray, pinkish, then black and autodigesting. Spore print black.
Stem
Shaggy ink cap
Stem 8-20 cm tall, 0.5-2 cm thick, cylindrical, slender, white, hollow inside. It has a movable ring in the middle or lower part — a characteristic feature. Surface smooth or finely downy.
Common ink cap
Stem 8-15 cm tall, 0.5-1.5 cm thick, cylindrical, white, smooth, hollow inside. There is no distinct ring — there may be a thin ring-like thickening near the base. Surface smooth or with barely noticeable down.
Flesh
Shaggy ink cap
The flesh is white, soft and tender in young specimens. In old ones it quickly blackens and dissolves (autodigestion). When a young one is cut, the color doesn't change.
Common ink cap
The flesh in the cap is thin, white to grayish. In old specimens it quickly blackens and autodigests. When a young one is cut, the color barely changes.
Smell
Shaggy ink cap
Faint, pleasant mushroomy smell. The taste is tender and delicate — young specimens are reminiscent of a soft omelet.
Common ink cap
Faint, pleasant mushroomy smell. Mild taste with nothing special about it.
📍 Habitats
Shaggy ink cap
Common ink cap
👀 Similar mushrooms — don't mix them up!
❓ Frequently asked questions
Can Shaggy ink cap and Common ink cap be mixed up?
How to tell Shaggy ink cap from Common ink cap?
Is Common ink cap edible?
When do Shaggy ink cap and Common ink cap grow?
Sources
- [1]Вікіпедія (українська)
- [2]Атлас грибів України, Зеров Д.К. (1979)
- [3]MycoBank Database
- [4]Index Fungorum
- [5]GBIF
- [6]iNaturalist Ukraine