1. GRASS GENERA III
Grasses with Panicoid Spikelets (Beadlike in Appearance)

2. “PANICOID SPIKELET”

3. A) Spikelets with Spines or Bristles

4. Echinochloa (Barnyard Grass)

5. Echinochloa

6. Echinochloa

7. Setaria (Bristlegrass; Foxtail grass)

8. Setaria

9. (Yellow Bristlegrass)
Introduced Setaria
* Setaria pumila
(Yellow Bristlegrass)
* Setaria viridis
(Green Bristlegrass)

10. (Streambed Bristlegrass) (Grisebach’s Bristlegrass)
Native Setaria
Setaria leucopila
(Streambed Bristlegrass)
Setaria grisebachii
(Grisebach’s Bristlegrass)

11. Setaria or Polypogon?

12. Setaria versus Polypogon

13. Cenchrus (Sandbur)

14. Cenchrus (Sand-Bur)

15. B) Panicoid Grasses Lacking Spines or Bristles
First Glume Minute (< .5 mm long)

16. Digitaria (Crabgrass)

17. Digitaria

18. Digitaria sanguinalis (Hairy Crabgrass)
Digitaria ischaemum (Smooth Crabgrass)

19. Digitaria californica (Arizona Cottontop)

20. Digitaria Look-Alikes

21. Digitaria vs. Cynodon vs. Chloris

22. Eriochloa (Cupgrass)

23. Paspalum (Knotgrass)

24. Paspalum (Knotgrass)

25. Paspalum distichum (Knotgrass)
Wetlands, Riparian Edge Habitat

26. C) Panicoid Grasses Lacking Spines or Bristles
First Glume Conspicuous (> .5 mm long)

27. Panicum – Perennial Species
Panicum obtusum
(vine mesquite)

28. Panicum – Perennial Species
Panicum bulbosum (Bulb Panicum)

29. Panicum – Annual Species
Panicum capillare (Fall Witch Grass)

30. PANICOID GRASSES Spikelets with Spines or Bristles: Echinochloa,
Setaria, Cenchrus
B) Spikelets Lacking Spines or Bristles; First Glume
Minute: Digitaria, Eriochloa, Paspalum
C) Spikelets Lacking Spines or Bristles; First Glume
Conspicuous: Panicum