Scientific Name - Ambrosia artemisiifolia L.
Family - Compositae
Taprooted summer annual with branched stems. Leaves hairy, deeply twice dissected. Male and female flowers separate, green. Reproduces by seed. Fields, pastures, roadsides, and waste places. Occurs in the northwestern and southeastern United States. Also found in Canada, Central and South America, the West Indies, South Pacific and Australia. Native to the United States.