308 



13. Outer glumes 3 ; flowering glumes hard 

 Outer glume 1 ; flowering glumes very 



thin... 



14. Spikelets awnless or with straight awns 

 Spikelets with twisted awns from 



flowering glumes ... 



15. Spikelets hermaphrodite 

 Spikelets unisexual 



16. Flowering glumes enclosing the grain, 



as stiff" as or harder than the outer 

 ones... 

 Flowering glumes and palea small, 

 very thin and transparent 



17. Glume concave, 3-nerved : fertile 



flowers terminal 

 Glume strongly keeled ; axis of spike- 

 let projecting beyond palea 



18. Awn single 



Awn absent or triple ... 



19. Lower glume awned ... 



Lower glume without awn 



20. Awn on glume iv 



Awns on glumes ii and ill 



21. Setae present among spikelets 

 No setae among spikelets 



22. Two empty glumes outside the flowering 



ones 

 Three empty glumes ... 



23. Outer glume minute ... 



Outer glume well developed 



23a.Eachis of spikelets flat prolonged 

 beyond them 



Rachis not prolonged ... 



24. Axis ending in a minute point at back 



of palea 

 Axis bearing several empty shortly 

 awned glumes above fertile flower 



25. Spike digitate ... 



Spikes distant in a long panicle 



26. Spikelets singly sessile or indented ... 

 Spikelets _ indented in pairs, 1 sessile, 



1 pedicillate 



27. Outer glume pectinate... 



Glume not pectinate ... 



28. Outer glume small, truncate, hyaline ; 



panicle branches awned ... 



Outer glume large 



29. Spikelet scarcely indented; glume ii stiff 



6. Panicum (p. 314). 



23. Zoysia (p. 318). 

 15. 



36. 

 16. 

 33. 



17. 



26. 



18. 



24. 

 19. 



21. 



8. Oplismenus (p. 



316). 

 20. 



2. Axonopus (p. 313). 



3. Panicum (p. 313). 



9. Setaria (p. 3161 



22. 



23a. 

 23. 



5. Digitaria (p. 314). 



6. Panicum (p. 314). 



11a. Stenotaphrum 



(p. 317). 

 1. Paspalum {p. 313), 



57. Ci/nodo)i(p. 326). 



25. 



58. Chloris (p. 327). 

 67. Lophatherum (p. 



329). 



27. 



31. 

 36. Eremochloa (p. 

 321). 

 28. 



1 1 '. Chamaeraphis (p, 

 316). 

 29. 

 30, 



