⚠ If you suspect ingestion of this species, call Poison Control immediately:
1-800-222-1222 (US) · poison.org

Common Inky Cap

Coprinopsis atramentaria

⚠ Toxic with Alcohol

Always verify identification with multiple features before consuming

Cap color: Gray to pale gray
Cap size: 4-8cm
Gill color: White then black (auto-digesting)
Gill attachment: Free from stem
Stem: White, fibrous, with ring zone
Texture: Fragile
Habitat: Clustered at base of trees or in grass
Fruiting season: Spring-Fall
Peak season: Spring-Fall

Key Identification Features

Gray conical to bell-shaped cap 4-8cm
auto-digests into black ink at maturity
smooth gray surface
CAUTION: causes Antabuse-like reaction if consumed with alcohol

Symptoms & Toxicity

Contains coprine. Safe to eat on its own but causes severe toxic reaction (flushing, nausea, vomiting, rapid heartbeat) if consumed with alcohol. Effects appear within 30 minutes of alcohol consumption.

Regions Found

Region data not available

Look-Alikes

No documented look-alikes on record.

Safety disclaimer: This page is for educational purposes only. Never eat a wild mushroom based solely on online information. Always verify identification using multiple reliable field guides and, when possible, consult an experienced forager or mycologist. When in doubt, don't eat it. Spore & Scout accepts no responsibility for identification errors or adverse reactions. If you believe someone has ingested a toxic mushroom, call Poison Control (1-800-222-1222) immediately.