Figure 125.Yarrow (Achillea millefolium)
Millefolium, milfoil, thousand-leaf, thousand-leaf clover, gordoloba, green arrow, soldiers' woundwort, nosebleed, dog daisy, bloodwort, sanguinary, carpenter grass, old-man's-pepper, cammock.
Yarrow is very common along roadsides and in old fields, pastures, and meadows in the eastern and central United States and Canada. Closely related forms occur in the Western States
This weed is from 10 to 20 inches high and has many finely divided, feathery dark-green leaves. From June to September the plant produces flat-topped panicles consisting of numerous small, white flower heads. It has a strong odor.
The tops, collected when the plant is in flower.