During September the bright yellow blossoms of the Sneezeweed illuminate the low meadows and swamps from one end of the country to the other. The stout, branching stalk rises from two to six feet in height. The firm, pointed, oblong or lance-shaped bright green leaves are sharply toothed and alternating. They possess a bitter taste, and when dried and powdered into snuff, produce violent sneezing. The foliage is believed to impart a bitter taste to milk, when cows forage upon it. The numerous large flower heads are borne on long stems in loose, spreading, rather flat-topped, terminal clusters. From ten to eighteen spreading and drooping ray florets, with three cleft tips surround the yellow or yellow-brown globular disk of tubular florets. The Swamp Sunflower is found from Quebec to Florida, and west to the Northwest Territory and Arizona, and blooms from August to October.