Chartreuse foliage gives year round interest. Nicely contrasting dark blue flowers. The root of the genus name Centaurea is centaur, which is Greek for healing. In Greek mythology, Chiton the Centaur used plants of this genus to heal his wounded foot. Although we haven't used this plant for this purpose, it has certain soothing properties for the garden. The flowers are reminiscent of the annual Bachelor Buttons, thus giving rise to its common name.