1. Winter annual grass weed ID Joe Armstrong Oklahoma State University

2. All photos, unless noted, were taken by Joe Armstrong. If you would like high resolution versions of these photographs, please contact Joe at joe.armstrong@okstate.edu.

3. rescuegrass Membranous ligule Dense hairs on seedlings Diagram: Weeds of the South

4. rescuegrass Seedheads are flat, awnless

6. cheat (“true cheat”) Membranous ligule Seedhead has awns weeds.ippc.orst.edu twig.tamu.edu Diagram: Weeds of the South

7. cheat

9. downy brome Japanese brome Membranous ligule Diagram: Weeds of the South

10. downy brome Japanese brome weeds.ippc.orst.edu weeds.ippc.orst.edu

11. downy brome Japanese brome

12. Italian ryegrass Membranous ligule Large, clasping auricles Shiny, waxy leaves ALS-resistance ACCase-resistance?? Diagram: Weeds of the South

13. Italian ryegrass

14. wild oat Large, jagged membranous ligule Scattered hairs on leaf and stem twig.tamu.edu Diagram: Weeds of the South

15. wild oat calphotos.berkeley.edu twig.tamu.edu

17. jointed goatgrass Short, membranous ligule Sparse, stiff hairs on leaf margins twig.tamu.edu jointedgoatgrass.wsu.edu Diagram: Weeds of the South

20. jointed goatgrass Can hybridize with wheat jointed goatgrass wheat hybrid twig.tamu.edu

21. feral rye Small, membranous ligule May have small auricles Grows taller than wheat

22. feral rye