Directory of Herbs C ommon Yarrow Achillea millefolium Compositae family Language and mythology Also known as Milfoil, Soldier's Woundwort, and Thousand-seal, this unassuming plant conceals great powers. Considered sacred by some, it is believed to be named after Achilles who used it to staunch blood flow in his army at Troy. The French word millesfeuilles was used to describe this plant's feathery and fern-like appearance. Over time the pronunciation became corrupted and people simply referred to it as Milfoil. This erect herb has fern-like foliage, which is covered with woolly hairs.
Leaves are alternate and pinnately divided into many small segments.
Leaflets are sharply cleft. The fruit is an achene. Pests and disease Powdery mildew, stem rot, rust. Cultivation Yarrow grows easily from seed, or divide clumps in the spring or fall. If it is used as a ground cover, it may be mowed once per year.