The yarrow plant is also known by many other names, such as carpenter’s plant, bloodwort, knight’s milfoil, old man’s pepper, staunchgrass and nosebleed, to name a few. Aside from its wispy leaves, another distinguishing characteristic of yarrow is its blossoms. Yarrow flowers are tiny and grow in flat-topped composite clusters at the top of the plant’s stems. They flower from June to October, and are either rose- or lilac-colored or white. Yarrow originated from Europe.