Achillea is a genus of flowering plants comprised of approximately 85 distinct species that are distributed across North America, Eurasia and North Africa.

Known by the common names of Yarrow or Milfoil, these strongly scented perennials have alternate leaves, which are simple to 3-pinnately dissected. For the inflorescence: heads are generally radiate, in flat-topped clusters; The ray flowers are few, white, pink, or yellow. Disk flowers are typically many, and corollae are short, white to purple or yellow. Fruits are oblong to obovate.