Field mushroom
A grassland relative of cultivated button mushrooms.
Pleurotus ostreatus
Русское название: Вёшенка обыкновенная
Widely cultivated as food, this wood-decaying fungus helps recycle nutrients in forests. Wild shelf-like fungi can be confused with other species. Commercially grown mushrooms are easier to trace than unidentified forest collections.

Never decide to eat a wild mushroom from a photograph or online description. A mistake can be fatal. For mushroom ingestion or suspected poisoning, contact emergency medical services or a poison centre immediately, even if symptoms have not appeared.
Irish Poisons Centre mushroom safety ↗Temperate regions worldwide
Decaying hardwood logs and standing dead trees
Images and brief descriptions are for learning, not for reliably identifying a specimen. Take particular care with poisonous plants and mushrooms.
Identification is never guaranteed by a photo. Scientific names are used to reduce confusion between local names.