36 



24. Valves ovate to ovate-oblong, 1 lin. long: side nerves 



rather inconspicuous. Anthers |-| lin. long- ... 25 



Valves oblong, f-1 lin. long; side nerves prominent. 



Anthers £-§ lin. long 26 



23. Spikelets ovate-oblong, 2£-4 lin. long, olive green to 



leaden grey E. chalcantha. 



Spikelets linear, 4-5 lin. long, yellowish-green. E. pallens. 

 20. Panicle often nodding, contracted. Spikelets up to 8 lin. 



long E. gangetica. 



Panicle erect, very slender, with short branches adpressed 

 to the axis. Spikelets 2-J-4 lin. long 27 



27. Not stoloniferous. Culms 2-3 noded. Spikelets 1-1] lin. 



wide E. elatior. 



Stoloniferous. Culms many noded with decumbent base. 

 Spikelets f-f lin. wide E. sarmentosa. 



28. Annual. Spikelets 1 lin. long, 2-1. rarely 3 flowered, on 



long fine pedicels E. biflora. 



Perennial or if annual then spikelets 3-11 flowered and 



very shortly pedicelled '. ... 29 



20. Creeping in sand E. glabrala. 



Not creeping in sand 30 



30. Glumes very unequal; lower rarely over i lin. long, 



sometimes suppressed 31 



Glumes sub-equal, or if unequal, then lower J lin. long 

 or more, and upper not more than i| times as long 32 



31. Lower sheaths strongly compressed. Spikelets 3-6 lin. 



by 1 lin E. plana. 



Lower sheaths not strongly compressed. Spikelets 2-4 

 lin. by £-f lin E. heteromera. 



32. Valves U-1J lin. long E. caesia. 



Valves about i lin. long or shorter, rarely slightly 



longer 33 



33. Spikelets 4-13 flowered (rarely 3), 2-7 lin. long, rarely 



shorter 3'i 



Spikelets 2-4 flowered, f-2 lin. long 42 



34. Valves 1 lin. long or slightly longer E. eurvula. 



Valves -| to 1 lin. long 35 



35. Spikelets 3-6 flowered, pallid 36 



Spikelets 4-13 flowered, more or less dark grey or 



purple 37 



36. Spikelets about 1 lin. broad. Panicle pyramidal, axils 



naked E. poa. 



Spikelets §-£ lin. broad. Panicle oblong, with bearded 

 axils E. wilmsii. 



