Oxeye Identification: Flowers sunflowerlike with yellow rays and an orange disk. The rays are fertile in that they have a small, forked pistil at the base (this is not present in true sunflowers). Disk elevated and rounded. Leaves heart-shaped with short petioles and toothed outer margins. Leaves in opposite pairs. Plant 2 to 5 feet in height.
Similar Species: Ox Eye can easily be mistaken for species of Helianthus with opposite leaves. The leaves are broader and more heart shaped than most species of sunflowers except for the thin-leaved sunflower. The lower, larger leaves of Thin-leaved Sunflower, however, have the base of the leaf abruptly narrowed and running down the petiole as wings.
Flowering period: July to September.