Parthenium integrifolium (wild quinine)

Also known as wild feverfew, this lovely plant has aromatic leaves and white pearl-like flowers. Some also say the flowers resemble tiny cauliflowers. Either way, it attracts plenty of pollinators! The sturdy stems and long bloom time make this a winner in the garden setting. 

Fun fact: During World War 1 it was used as a substitute for Cinchona bark to treat malaria.