12 



12. Lower glume distinct (See also 55) Panicum. 



Lower glume minute or 13 



13. Nerves of lower value 5-7 close straight and prominent. 



Lower glume usually present but minute. Digitaria. 

 Nerves of lower valve 5 or fewer. Side nerves curved and 

 usually submarginal. Lower glume absent. 



Paspalum. 



14. Spikelets 1 flowered. No male or barren florets ... 15 

 Spikelets with more than 1 perfect floret, or with 1 perfect 



and 1 or more male or barren florets 16 



15. Glumes shorter than the glabrous valve Cynodon. 



Glumes longer than the ciliate valve Microchloa. 



16. Spikelets with 1 perfect and 1 or more male or barren 



or rudimentary florets 17 



Spikelets with 2 or more perfect florets 20 



17. More than one spike in the infloresence Chloris. 



Spike solitary 18 



18. Spikelets awned Ctenium concinnum. 



Spikelets awnless 19 



19. Upper glume much longer than the lower 



Ilarpechloa capensis. 

 Lower glume slightly longer than the upper ... 



Microchloa altera var. nelsoni. 



20. False spikes numerous, arranged spirally 21 



Spikes or false spikes solitary or umbelled, sometimes 



with 2 below the umbel 23 



21. Valves minutely notched. (See also 88) Dlplaclme. 



Valves entire 22 



22. Tips of rachilla joints fringed with minute hairs. 



Pogonartlu-ia falcata. 

 Tips of rachilla joints not fringed. (See also 88). 



Eragrostis. 



23. Inflorescence a single false spike 24 



More than one spike in the inflorescence 25 



24. Spikelets 2 flowered Prionantliium pholluroldes. 



Spikelets 4-9 flowered. (See also 113) Brlzopyrum. 



25. Spikes terminated by a spikelet Eleusine. 



Point of the rachis of the spike naked, projecting. 



Dactyloctenlum aegyptiacum. 



26. Spikelets with 1 perfect floret, with or without 1 or more 



male or barren florets, or empty valves, below it... 27 



Spikelets with 2 or more perfect florets or very rarely 



with only 1 perfect floret, which has male or barren 



florets or empty valves above it 71 



