Meadow buttercup
Ranunculus acris is a species of flowering plant in the family Ranunculaceae, and is one of the more common buttercups across Europe and temperate Eurasia. Common names include meadow buttercup, tall buttercup, common buttercup and giant buttercup.
Photo: By Christian Fischer, CC BY-SA 3.0, https://commons.wikimedia.org/w/index.php?curid=4058986