B.— SPIIiELETS PEDICELLATE AND SESSILE; USHALLY" 

 IN PAIRS. 



SpiTcelets not awned, 



Spikelets not sunk in rachls. 



Spikelets in separate male and 



female spikes : — 



Fruiting spikelet enclosed 



in a bo-ny bract ... (97) Colx. 



Fruiting spikelets enclos- 

 ed in the enlarged hard 

 outer glume ... (98) Polytoca, 



Spikelets in a 



cence : — 



Spikelets with 

 hairs 



2-sexual inflores- 

 long silky 



Spikelets sunk in rachis r — 

 Glume smooth 

 Glume pitted 



SpiTcelets awned, 



Spikelets in pairs. 



Spikelets one-flowered : — 

 Spikes densely silvery ... 

 Sp-ikes not silvery 



Spikelets two-flowered : — 

 Glume I tiiberculated. 

 Leaves with tuber- 

 culated hairs 

 Glume I not tuberculated. 

 Leaves without tuber- 

 culated hairs 



Spikelets in triplets or more. 



Spikelets not subtended 

 by a spathe 



(101) Saccharum. 



(114— 1161 Rottboellla:. 

 (117'} Manisuris. 



(100) Pollinia. 

 (119-123, 126, 128—132)' 

 Andropogon» 



(ill) Thelepogoh. 



(102^ — 108) IscHaemum. 



127) Andrb- 



... (124, 125, 

 pogon. 

 Spikelets subtended by a spathe : — 



Spathe strongly ciliate. (Not ciliate in A. gigantea.) 



Male whorl present 

 Male whorl absent 

 Spathe not ciliate 

 Male whorl absent 

 Male whorl" present 



(133—135) Anthistiria. 



(138) Pseudanthistiria. 

 (Silky ciliate in L Wightii) 

 (112, 113). Apluda. 



(136-137) Iseilema. 



