10/Oct/2025, 4:02 PM
Kadrioru park, Tallinn, Harju, Eesti
Urban park, mowed lawn, on rich with humus soil
59°26'24.2"N 24°47'13.1"E
🌡️ 12°C 🌤️ Scattered clouds 💨 Wind 320° NW->SE, 19 km/h
Original Instagram postCoprinopsis atramentaria
common ink cap
- Scientific identification
- Coprinopsis atramentaria (Bull.) Redhead, Vilgalys & Moncalvo
- Family
- Psathyrellaceae
- Class
- Agaricomycetes
- Genus
- Coprinopsis
Names across languages
- English: common ink cap
- German: Falten-Tintling
- Finnish: Harmaamustesieni
- Estonian: Voldiline tindik
- Russian: Навозник серый
The scientific profile
From the latest record: 2025-10-10.
Hymenium
Gills, free and very crowded; white when young, turning gray, then black and liquefying
Cap
Starts egg-shaped or bell-shaped, then becomes convex or flat; smooth; gray to gray-brown; margin often splits before deliquescing
Hymenium Attachment
Free
Stipe
Slender, hollow, smooth or slightly fibrous; whitish above, darker or grayer below; no persistent ring (veil is ephemeral)
Spore print
Spore print very dark brown to black
Ecology
Saprobic, on buried or decayed wood, root systems, stumps, or mixed with soil in lawns, gardens, and disturbed sites, spring through autumn
Edibility
Edible when young, poisonous with alcohol (coprine, causing a disulfiram-like reaction)
Fruit body
Fruit body medium, stipe ~8–15 cm length, 0.6–2 cm thick
Dimensions
Cap diameter ~3–10 cm
Description
Inky deliquescence tied to autolysis of gills
Flesh
Flesh no staining when cut
Chemical reactions
No strong reaction
Odour
Indistinct
Taste
Mild
Microscopy
Spores ellipsoid to almond-shaped, smooth, ~7.5–11×4.5–6 μm, with a distinct apical germ pore, 4-spored basidia
Overview
Classic inky mushroom whose gills dissolve to black ink. The bell-shaped grayish cap, free gills that deliquesce, hollow stipe, and black spore print.
2001). In Redhead, Vilgalys, Moncalvo, Johnson & Hopple, Taxon 50(1): 226.
Field encounters
Source hashtags
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