Plausible Field Mushroom
Agaricus campestris
White Mushroom in Grass: High Risk of Toxic Lookalikes

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Key Features
- White
- smooth cap
- convex to flat
- Gills free from stem
- dark pink to chocolate brown
- Prominent white ring (annulus) present on stem
- Growing singly in grass/lawn environment
- Stem base appears slightly thickened
Color:
White cap and stem, dark brown gills
Smell:
Unknown
Growth Pattern:
Einzeln
Environment:
Boden/Gras (Soil/Grass)
Habitat & Distribution
Habitat:
Rasen, Wiese (Lawn, meadow)
Distribution:
Europa, Nordamerika, weltweit
Seasonality:
Sommer bis Herbst
Critical Features for Confirmation
- Crucial staining reaction (yellowing) is not visible
- Odor is unknown (critical for ruling out A. xanthodermus)
- Stem base is not fully excavated to confirm absence of volva
Economic Value
Market Demand:
Unknown - high risk of misidentification
Price Range:
N/A
Commercial Use:
None
Similar Species
Yellow-staining Mushroom
Agaricus xanthodermus
Key Differences:
- Flesh stains chrome yellow when bruised, especially at stem base
- Distinctive unpleasant phenolic or ink odor
Destroying Angel
Amanita virosa
Key Differences:
- Gills remain white (never pink or brown)
- Presence of a sac-like volva at the stem base (often buried)
- Stem lacks the typical Agaricus ring structure
Recommended Action
Do not consume. Isolate and dispose of specimen. Critical identification features (staining, odor, stem base) are missing.