Named after Achilles, who is said to have used it as a treatment for his wounds (Compositae). Yarrow, milfoil. Hardy perennials, for the border or border rock garden. Species cultivated : Border A. filipendulina, large, plate-like heads of yellow flowers in summer; cultivars include ‘Gold Plate’, 4-5 feet, ‘Flowers of Sulphur , 2 feet, soft sulphur yellow flowers and powdered […]