IPM1007, Revised November 2009
Perennial weed that is similar in appearance to the garden chrysanthemum but with persistent rhizomes that may be spread or transported by cultivation equipment. Leaves are 2 to 4 inches long, 1 to 3 inches wide, simple, alternate, deeply lobed, and have a distinctive aroma. Leaves on the upper portions of the plant are more deeply lobed and may lack petioles. Leaf undersides are covered with soft, white to gray hairs, while upper leaf surfaces may be smooth to slightly hairy. Stems may reach 5 feet in height and become woody with age. Flowers are inconspicuous and occur in clusters at the top of plants.
Order publications online at http://extension.missouri.edu/explore/shop/ or call toll-free 800-292-0969.