Yellow stainer
Agaricus xanthodermus
The yellow stainer is a white-capped mushroom with a skirt-like ring. Its stem base turns bright yellow at once when cut, and it gives off an unpleasant, sweetish phenol smell. It causes serious gastric upset in most people and is behind about half of all Agaricus poisonings.
Where it's found
Woods, lawns, gardens and hedgerows in autumn, feeding on decaying matter.
Distribution
Common in North America, Europe, West Asia including eastern Anatolia and Iran, North Africa and southern Africa; introduced to Australia.
Similar species
Identification suggestions (from the community or from AI) and the information here may be wrong; this app never confirms that anything is safe to eat. Do not consume wild plants, mushrooms or seafood without expert confirmation. Nothing here is medical advice.