33 



15. Innovation buds or young stolons covered with villous 



scales. Culms erect E. gigantea. 



Innovation buds with only basal, scales fugaciously 

 tomentose. Culms ascending from a decumbent and 

 rooting base E. villosa. 



16. Spikelets 1-lf lin. long or if up to 2^ lin. (E. erecta), then 



the upper empty valve with a pair of obscure beard- 

 less ridges, and no definite appendages at the base 17 

 Spikelets 2-4 lin. long. Upper empty and fertile valves- 

 ^ hinged together 20 



17. Empty valves very similar and sub-equal, exserted from 



the glumes 18 



Upper empty valve about equalUng the glumes. Lower J 

 length of the upper 19 



18. Perennial. Spikelets 1J-2J lin. long. Stamens 6. E. erecta. 

 Annual. Spikelets 1 lin. long. Stamens 3. E. delicatula. 



19. Perennial with basal tufts of villous leaves. Valves 



glabrous E. melicoides. 



Annual. Empty valves hairy E. brevifolia. 



20. Suffrutescent. Blades very much reduced or sup- 



pressed 21 



/Not suffrutescent. Blades flat or convolute 22 



21. Culms stout, usually bladeless. Glumes usually shorter 



than the valves E. ramosa. 



Culms slender, sometimes bearing short blades. Glumes 

 slightly exceeding the valves E. aphylla. 



22. Empty valves glabrous 23 



y Empty valves hairy 24 



23. Spikelets erect, 3-4 lin. long. Panicle spike-like ... 



E- subspicata. 



Spikelets nodding on the flexuous rachis of a raceme, 



2J-3 lin. long E. rehmanni. 



24. Annual. Culms J-l ft., 2-3 noded E. pusilla. 



Perennial. Culms 1-2 ft., 4-6 noded E. calycina. 



ELEUSINE. 



Spikes slender. Valves acute E. indica. 



Spikes thick, often curved. Valves obtuse ... E. coracana. 



EN.XEAPOGON. 



1. Awns scaberulous along the margins E. scaber. 



Awns distinctly plumose or ciliate 2 



