311 



60. Spikelets 1 sessile and 2 pedicelled in 



each bract ... 

 Spikelets more than 3 in each bract . . . 



61. Spike surrounded by a whorl of male 



flowers 

 Male flowers not in a whorl ... 



62. Inflorescence enclosed by cylinder of 



florets 



Inflorescence fanshaped, globose or 

 paniculate ... 



63. Two short spikes in each bract 



Many fascicled spikes in each bract ... 



64. Outer glume thin, enveloped in long 



sUky hairs ; panicle large ... 

 Outer glume stiff, usually longer than 

 the outer hairs 



65. Spikelets awned 



Spikelets awnless 



66. Rachis caniculate 

 Rachis filiform ... 



67. Glumes ciliate ... 



Glumes glabrous 



68. Spikelets in pedicellate spikes... 



Spikelets in threes, 1 sessile between 2 

 pedicellate ... 



69. Spikelets all distinctly pedicellate and 



panicled 

 Spikelets sessile or subsessile 



70. Awn long and twisted ... 

 Awn none or straight and short 



71. Flowering glumes surrounded by long 



dense silky hairs ; tall reeds with 

 large panicles 

 Spikelets glabrous or shortly hairy ... 



72. Flowering glume 3-fid 



Flowering glume aristate 



73. The long hairs on flowering glumes ... 

 The long hairs on rachis 



74. Spikelets small with 2 flowers 

 Spikelets flat, with 3 or usually many 



flowers 



78. 



