97. GRAMINEJS. 



terminal sometimes ternate. Inflores- 

 cenoe usually of spikes or panicled spikes, 

 the rachis of the spike articulate 

 (exc. Apluda). Flowering glume smaller 

 than the empty ones, hyaline, usually 

 awned or reduced to an awn base. 



a. Spikelets all 1-sexual only the males 

 2-8-nate, in a separate inflorescence 

 or part of inflorescence from the female. 



Fruiting spkts. conspicuous by the large hard 

 white bracts . 8. Coix. 



Fem. spkts. with long cottony stigmas. Frt. 

 exposed (Maize ) . . . • • 9, Zea. 



b. Spikelets 2-sexual ( fls. often 1-sexual) 



or one of each pair 2-sexual. 



1. Spkts. of each pair" similar (subsi- 

 milar in Pogonatherum) and homo- 

 gamous, if heterog. then fem. pedi- 

 celled. Spikes not subtended by 

 spathes. 



t Spkts. many in hirsute or silky spikes which 

 are solitary digitate or fascicled (Or 

 sub-panicled in Ischsemum spp.) 



i, Gl. I of sessile "spkt. convex or 

 dorsally flattened with narrowly 

 inflexed margins. 



Gl. IV very much reduced.' Pale as short as the ovary 10. Tollinia. 



Gl. IV distinct and its pale longer than the ovary . 11. IschcerMim. 



ii. Gl. I of sessile spkt. laterally 



compressed. Awns two . . 12. Pogon ath crttm 



tt Spkts. in a dense silvery-hairy thyrsus or 

 spreading panicle. 



Both spkts. of the pairs pedicelled. Stem t-Z ft. .. 13. Imperuta. 



Pairs of one sessile and one pedicelled spkt. Gl. IV 

 awnless . 14. Gacvharum. 



As in Saccharum but Gl. IV distinctly awned . 15. Erianthus. 



2. Spkts. often dissimilar, always hetero- 

 gamous, 1-fld. Sessile spkts. usually 

 2-sexual, pedicelled male or neuter 

 (rarely 2-sexual in Apluda). 



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