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Ink Caps, scientifically known as Coprinopsis atramentaria, are mushrooms characterized by their unique deliquescent behavior, where the caps dissolve into an inky fluid as they mature. They are commonly found in grassy areas, disturbed ground, and urban environments. While young, they are edible, but they contain coprine, which can cause a disulfiram-like reaction when consumed with alcohol.
How to Identify
- Cap
- The cap is initially bell-shaped, expanding to become flat with age. It is typically gray to brownish-gray in color and may have a slightly furrowed surface.
- Gills
- The gills are closely spaced and free from the stem. They start white and turn black as the mushroom matures, eventually dissolving into an inky fluid.
- Stem
- The stem is slender, hollow, and white to grayish in color. It is smooth and lacks a ring.
- Flesh
- The flesh is thin and fragile, with a mild odor when young.
- Fruiting body
- The fruiting body is delicate and prone to rapid deterioration, often dissolving into an inky liquid as it matures.
- Habitat
- Ink Caps are commonly found in grassy areas, disturbed ground, and urban environments, often growing in clusters.
Key Facts
- Cap surfaces: Slightly furrowed
- Growth Form: Clustered
- Spore Print: Black
- Body color: Gray to brownish-gray
- Odor: Mild when young
- Flesh bruises: Does not bruise
- Height: 5-15 cm
- Cap Diameter: 2-5 cm
- Nutrient gathering: Saprophytic
Toxic
Moderate ToxicityInk Caps contain coprine, which can cause a disulfiram-like reaction when consumed with alcohol. Symptoms include flushing, nausea, vomiting, and palpitations. The severity of the reaction varies depending on the amount of alcohol and mushrooms consumed.
Quick Check
- Odor: Mild
- Fruiting: Dissolves into inky fluid
- Substrate: Grass, disturbed soil
Where to Find
Grasslands
Grassy areas such as lawns and meadows.
Disturbed Soil
Disturbed ground including gardens and roadsides.
Urban Areas
Urban environments such as parks and vacant lots.
Finding Tips
Clustered Growth
Look for clusters of mushrooms growing close together.
Cap Shape
Check for mushrooms with caps that are initially bell-shaped and later flatten out.
Gill Color
Observe the gills, which start white and turn black as the mushroom matures.
Similar Species
Coprinus comatus
A species of mushroom
Also known as: Alcohol Inky
Scientific Classification
- Phylum
- Basidiomycota
- Class
- Agaricomycetes
- Order
- Agaricales
- Family
- Psathyrellaceae
- Genus
- Coprinopsis
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