434 CXLII. OBAMINEiE. 



Awn between the teeth of flowering ghime 



proceeding from tlie 3 united middle nerves. 57. Danthonia. 

 Awn below the top proceeding from mid- 

 norve only. 

 Flowering glume compressed, keeled. 



Awn bent or flexuous 58. Tki3ETU3I. 



Flowering glume rounded on back. Awn 



twisted 59. A vena. 



Spikelet with lowest flowering glume imperfect. 



Outer glimies 3-nerved 60. Trichopteeyx. 



Outer glumes many-nerved 61. Cu/ETOBROMUS. 



Spikelets with 2 lowest flowering glume male or 



neuter, awned ; upper fertile, awnless . . . 62. HiEEOcnLOA. 



Subtribe 6. Festfcace^. 

 Stamens never more than 3. 



Spikelet articulated below the outer glumes (as 



in Panicece), 2-4-flowered 63. FiNaERHUTiilA. 



Spikelet articulated above the outer glumes, 

 which are persistent. 

 Grain free, not adhering to upper palea. 

 Kachis of spikelet bearded with long hairs. 



Lowest flowering glume hermaphrodite. 64. Arundo. 

 Lowest flowering glume male or neuter. 65. Puragmites. 

 Kachis of spikelet not bearded with long 

 hairs. 

 One or both outer glumes 5- or more- 

 nerved. 

 Flowering glume many-nerved, deeply 

 divided, into 9-13 nearly equal 



points 66. Pappophorum. 



Flowering glume 9-nerved, obovate, 



2-fid at top 67. ScuisMus. 



Flowei'ing glume 7-nerved, with a 



very long flexuous point .... 68. UROcnKENA. 

 Flowering glume faintly 9-nerved, 



very thin, acute- or short-pointed . 69. Lasioculoa. 

 Flowering glume many-nerved, coria- 

 ceous, pointless or acute (Cape spe- 

 cies with club-shaped hairs ou back) 70. Brizopyrum. 

 Flowering glume 7- or more-nerA^ed, 

 llattish-convex, membranous at top, 

 blunt (in Cape species with very 

 long silky hairs on back) . . . ^. 71. Melica. 

 Flowering glume obsoletely 3-nerved, 



blunt or \vith very short point . . 72. CiioxDROLiENA. 



Outer glume never more than 3-nerved. 



Flowering glume pointed, awned or 



acute ; nerves, when present, 



running into the point. 



Flowermg glume herbaceous, 



1 jointed, compressed, keeled. 



Panicle contracted, branchletb in 



1-sided clusters .73. DACTiLid. 



Flowering glume membranous, 



