As one might guess from the varied names, Yarrow Flower was often carried along with military armies on the march for the purpose of slowing and stopping the blood flow of wounds. Indeed, it was written that the Greek hero Achilles even carried it with his army to treat wounds. In the mid ages, the flower's use was extended further, and was a component Gruit, which was used to flavor beers before hops became prevalent. It was also used as a popular vegetable during the 17th century, with leaves providing a pleasant taste when they were used in a manner similar to spinach. Yarrow flowers are also often used in handfasting rituals and weddings, and are believed to be of use in spells of divination.
Today, interestingly, many herbalists have found Yarrow flower to be of great use in treating colds and influenza. There is also some evidence that it provides a positive impact on the circulatory, digestive, excretory, and urinary systems. Herbalists have also applied it in the treatment of allergies that involve mucus problems, perhaps most famously for hay fever.