Plant has green, fern-like fragrant foliage with small yellow, button-like flowers in summer. Leaves are used to make dyes or dried for an insect repellent.  Flowers can be used in cut floral arrangements.  It grows 36-48" tall by 24-30" wide in full sun to part shade in well drained soil.  Can become invasive if not kept under control.  Perennial zone 4-9.