Flaveria campestris is an annal herb up to 90 cm (3 feet) tall. It produces a tightly packed corymb of up to 100 small flower heads. Flowers are yellow, sometimes lacking ray flowers, other times with only a single ray flower per head. Each head has 5-8 disc flowers.Johnston, John Robert. Proceedings of the American Academy of Arts and Sciences 39(11): 287. 1903.Powell, Albert Michael. 1979. Annals of the Missouri Botanical Garden 65(2): 626-628 description and commentary in English, distribution map on page 608
