Field mushroom
A grassland relative of cultivated button mushrooms.
Suillus luteus
Русское название: Маслёнок обыкновенный
Associated with pine roots and important in forest nutrient exchange. Appearance varies with rainfall and maturity. The species name is useful for ecological study but cannot by itself certify that a wild specimen is suitable to eat.

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 ↗Europe and regions with introduced pines
Soils near pine trees, mycorrhizal partner
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.