Filipendula ulmaria, commonly known as meadowsweet or mead wort, is a perennial herb in the family Rosaceae that grows in damp meadows. Sometimes referred to nature's aspirin, meadowsweet is one of the most common herbs, growing wild throughout Europe and Asia, and naturalized to grow throughout North America's Eastern coast. It was one of the three sacred herbs renowned by Druids, along with vervain and water-mint.