SYNOPSIS or THE GENERA, 



43. Cynostj'rus, [Page 145,] PrtH/c/e spiked. Spikelets two or 



many-flowereJ, fixed upon pectinate bractecc. Glumes two, 

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

 awned at the apex. 



44. Arun'do, [Page 147.] Panicle loose. Spikelets many-flower- 



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

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

 two, unequal^ shorter than the floi'ets. Glumelles two, 

 unequal, 



* ^ Floivers spiked. Spikelets sessile, upon a common stalk or 



rachis. 



f Spikelets inserted on all sides. 



45. Ely'mus, [149,] Inflorescence s^'iked. Spikelets two or three 



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

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

 equal. 



46. Hou'deum, [Page 150.] Inflorescence spiked. Spikelets sin- 



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

 fect. Glumes two, lateral. Glumelles two, the outer valve 

 awned, Fruit closely invested with the glumelles. 



47. Trit'icum, [Page 154.] Inflorescence spiked, Spikelets 



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

 placed transversely, the sides directed to the rachis. Glu- 

 melles two, lanceolate ; the external one mostly aivned at 

 the apex. 



48. Brachy'i'odium, [Page IGO,] 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. 



40. Lo'lium, [Page 1C2.] /jj^oresce/jce a two-sided spike. Spike- 

 lets alternate, comi)resse(l, many-flowered. Gluma a single 

 valve. Glumelles two, nearly equal ; the outer valve awn- 

 less, or with an awn below the apex, 



50. Rottbol'ha, [Page 165.] Inflorescence a two-sided spike. 



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

 valves, sometimes single, lateral. Glumelles two, awnless, 

 imbedded in the nolclies of the rachis. 



51. Knap'pia. [Page 166,] luflorescencc racemose, simple. 



Glumes two, truncated, nearly equal, awnless, Glumelles 

 two, equal, obtuse, awnles.s, hairy. 



