SYNOPSIS OF THE GENERA. 



43. CYNOSTJ'KUS, [Page 145.] Panicle spiked. Spikelets two o 



many-flowered, fixed upon pectinate bracleoc. Glumes two 

 equal. Glumelles two, nearly equal, the outer pointed, o 

 awned at the apex,. 



44. ARUN'DO, [Page 147.] Panicle loose. Spikelets many-flower 



ed ; the lower floret bearing stamens only, and naked ; tb 

 upper perfect, and surrounded by a tuft of hairs. Glume 

 two, unequal, shorter than the florets. Glumellcs two 

 unequal, 



** Flowers spiked. Spikelets sessile, upon a common stalk o 



rachis. 



f Spikelets inserted on all sides. 



45. ELY'MUS, [149.] Inflorescence spiked. Spikelets two or thre 



from the same point, two or three-flowered. Glumes two 

 both on one side of the spikelet, Glumelles two, nearlj 

 equal. 



46. HOR'DETJM, [Page 150.] Inflorescence spiked. Spikelets sin 



gle-flowered, three together, the lateral ones mostly imper 

 feet. Glumes two, lateral, Glumelles two, the outer valv 

 awned. Fruit closely invested with the gltimelles. 



47. TIHT'ICUM, [Page 154.] Inflorescence spiked, Spikelet 



many-flowered, all fertile. Glumes two, nearly equal 

 placed transversely, the sides directed to the rachis. Gltt 

 melles two, lanceolate ; the external one mostly awned a 

 the apex. 



48. BRACHY'PODIUM, [Page 160.] Inflorescence somewhat race 



mose. Spikelets alternate, somewhat compressed, many 

 flowered; 'footstalks short. Glumes unequal, transverse 

 Glumelles two, the outer valve mostly awned at the ex 

 tremity. 



49. LO'LIUM, [Page 162.] Inflorescence a two-sided spike. Spike 



lets alternate, compressed, many -flowered. Gluma a singl 

 valve. Glumelles two, nearly equal ; the outer val\e awn 

 less, or with an awn below the apex. 



50. ROTTBOL'LIA, [Page 165..] Inflorescence a two-sided spike 



Spikelets alternate, one or two-flowered, Glumes of twi 

 valves, sometimes single, lateral, Glumelles two, awnjess 

 imbedded in the notches of the rachis. 



51. KNAP'PIA. [Page 166.] Inflorescence racemose, simple 



Glumes two, truncated, nearly equal, awnless, Glumclle 

 two, equal, obtuse, nwnless, hairy. 



