Yarrow, also called Yarroway, Knight's Milfoil, Old Man's Pepper and various
other common names, is a member of the daisy family that is native to Europe,
Asia and North America.
Despite the astringent and bitter taste, the flowers
were a popular salad herb and flavoring agent for liquors and beer in the 17th
century. Today, yarrow flower is usually used to make infusions, tinctures and
extracts.