OXEYE DAISY, Chrysanthemum leucanthemum L. 1, entire plant showing flower heads; 2, ray flower or petal; 3, disk flower; 4, seed; 5, base of plant with numerous stems. Perennial, reproducing by rhizomes and seeds. Root system fibrous. Stems smooth, seldom branched, 1 to 3 feet (30 to 90 cm) high. Leaves alternate, simple, usually conspicuously lobed, especially near base of plant. Flower heads occurring singly at the ends of the stems, 1 to 2 inches (2.5 to 5 cm) in diameter. Ray flowers with white petals, disk flowers yellow. Seeds oval, usually curved, with one side straight and other convex, 1/16 inch (1.5 mm) long, with a prominent knoblike scar on top. Seeds black with 8 to 10 white or gray ridges or ribs. Found in old pastures, especially those low in fertility. Not a problem in cultivated fields.