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Figure 1. Palmer amaranth stem <br />Figure 2. Palmer amaranth seed head Figure 10. Redroot pigweed seed head <br />Figure 4. Palmer amaranth petiole <br />Figure 5. Waterhemp stem <br />Figure 3. Palmer amaranth seed head <br />Figure 11. Redroot pigweed <br />seed head <br />Figure 8. Waterhemp petiole <br />Figure 9. Redroot pigweed stem <br />Figure 6. Waterhemp seed head Figure 13. Powell amaranth seed head <br />Figure 12. Powell amaranth stem <br />Figure 7. Waterhemp seed <br />head <br />Figure 14. Powell amaranth seed head <br />Figure 15. Palmer amaranth spiny bracts Figure 16. Palmer amaranth seed head <br />Identification, Biology and Control of Palmer Amaranth and Waterhemp in North Dakota (W1916) | www.ag.ndsu.edu/extension 3