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. Digilaria. 

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

 usually submarginal. Lower glume absent. 



Paspalum. 



14. Spikelets 1 llowered. No male or barren llorets ... 15 

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



and 1 or more male or barren llorets 10 



15. Glumes shorter than the glabrous valve (Jynodon. 



Glumes longer than the ciliate valve Microchloa. 



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



or rudimentary llorets 17 



Spikelets with 2 or more perfect llorets 20 



17. More than one spike in the infloresence Chloiis. 



Spike solitary 18 



18. Spikelets awned Cteiihim eonciniuim. 



Spikelets awnless 19 



19. Upper glume much longer than the lower 



Harpechloa 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 umbel led, sometimes 



with 2 below the umbel 23 



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



Valves entire 22 



22. Tips of raehilla joints fringed with minute hairs. 



Pogonaitluia falcata. 

 Tips of raehilla 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 llowered Prionantliium pholiuroides. 



Spikelets 4-9 llowered. (See aiso 113) Brizopyrupi. 



25. Spikes terminated by a spikelet Elcusine. 



Point of the rachis of the spike naked, projecting. 



Dactyloctenium aegyptiaeuni. 



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 if 71 



