Other common names
Flatspine bur ragweed, sand-bur, annual burweed
Annual bursage grows to 3 feet tall and is common in disturbed sites as well as in various plant communities.
Grayish-green and lobed; covered with short, bristly hairs; oppositely attached to the stem toward the bottom of the plant, and alternately attached above.
Gray-green and bristly.
Produces greenish male and female flowers on the same plant during the summer. Male flowers occur at the ends of branches. Female flowers are spiny and are found in the leaf axils
Grows a slender taproot and many fibrous roots.
Where it grows
Roadsides, vacant lots, pastures, agricultural fields and disturbed areas, dry and moist sandy soils
Annual (lives one year)
Reproduces by seed; burs stick to surfaces, helping spread this weed
Little information is available on the control of annual bursage. As with all annuals, preventing seed production is essential. Control before seedheads are produced.