yarrow

noun3

1. •
   Any of several pungent Eurasian and North American herbs, of the genus Achillea, used in traditional herbal medicine.
2. •
   Common yarrow, Achillea millefolium, the type species of the genus.

   • The Yarrow, where-with-all he stops the wound-made gore: — 1612
3. •
   (UK) A green woodpecker, of species Picus viridis.