KMT. 311 



ipon each joint of .the rhaohis, 2 glumes belonging to each 

 Darticular spikelet, and altogether forming a sort of invo- 

 ucre, only the middle spikelet fertile ; lower pale of its 

 lower long-awned from the apex. Spike dense. 



Hordeum. 



Gr. V. 44. 



W. IV. 48. 



Glumes not forming an involucre 518 



578. Apparent spike oblong-linear, ovate-oblong, or 

 sylindric — that is, a much-contracted panicle 579 



One-sided spikes racemed, sometimes 2 onljr. Spike- 

 ets spiked in two rows on the outer side of a triangular 

 •hachis. Glumes coriaceous, laterally compressed, keeled, 

 jristle-pbinted, upper one often awned. Styles long, com- 

 nonly united below. Spartina (597). 



G. 16. 



W. 60. 



379, Pales unequal, mucronate ; and the nearly equal, 

 inear glumes with their bristle-like awns twice their length. 

 ?anicle spicate, densely conglomerated, interrupted, 2-3 

 nches long. Muhlenbergia glomerata, Trin. (587). 



Lower pale with a few, minute teeth at the apex, 

 md awned ; the upper one 2-toothed. Glumes hairy all 

 iver. Contracted, spike-like panicle interrupted. 



Folypogon Mouspeliensis, Desf. 



Gr. II. 8. 



W. I. 8. 



Lower pale tnincato and awnless. Glumes tipped 

 nth either short bristles about i of "their length or awn-like 

 in es, as long as themselves. Spike oblong-ovate, or long, 

 ylindric. Fhleum. 



Gr. L 4. 



W. L 11. 



580. Spikelets in a loose, more or less open, or contracted 

 panicle (or raceme) 581 



Spikelets arranged' in a solitary spike, in a spike- 

 •earing raceme, or in a spike-like, ovoid panicle 694 



581. Lower pale awned s,582 



Lower pale awnless , §88 



