12 



Flowering glumes rounded on the back. Five or 

 more perfect flowers. Grain glabrous. 

 Seed deeply furrowed ... ... 62. Amphibromus. 



Awn terminal between the rigid lobes or lateral awns 



of the glume 



Spikelets one-flowered (large with long awns)... 63. Anisopogon. 

 Spikelets several-flowered ... ... ... 64. Danthonia. 



Tribe VI. ASTKEPTJE. Spikelets with several or in a few genera only one 

 or two bisexual flowers, the rhachis usually produced and often bearing one or 

 more empty glumes above them. Flowering glume unawned or with one or 

 more terminal untwisted awns. Palea prominently two-nerved or two-keeled, 

 usually as long or nearly as long as the glume. 



(The rhachis is not produced above the perfect flowers in Miliese, and in a 

 few species of other subtribes.) 



Subtribe I. Pappophorese. Spikelets one or several flowered, in a dense 

 compound head, or in a spikelet or looser panicle. Flowering glumes rounded 

 on the back, with three or more nerves leading to three or more terminal 

 lobes or teeth, all unawned, or the central one or all tapering into untwisted 

 awns. 



(See also Chloris, which has often a small awn or narrow lobe on each 

 side of the awn, and a few Festucacese have the hyaline tip two-lobed in 

 front of or on the side of the awn.) 



Spikelets with one perfect flower (one or more ad- 

 ditional male flowers or empty glumes in 

 Pappophorum). 

 Lobes of the flowering glumes three. Spikelets 



capitate. 



Lobes of the flowering glume all with long 

 points or fine awns. Khachis not pro- 

 duced above the flower... ... ... 65. Amphipogon. 



Central lobe only of the flowering glume 

 awned. Rhachis continued in a small 



bristle 66. Echinopogon. 



Lobes of the flowering glume nine (in the N.S.W. 

 species). Spikelets in a short dense or 

 loose panicle ... ... ... ,.. 67. Pappophorum. 



Spikelets with several perfect flowers. 



Spikelets sessile in two rows on one side of one 

 or two simple spikes, flowering glume 

 three-lobed, the central lobe alone 

 awned 68. Astrebla. 



Spikelets paniculate. 



Flowering glume with three narrow awned 



lobes 69. Triraphis. 



Flowering glume with three unawned lobes 



or teeth 70 Triodia. 



Subtribe II. Chloridese. Spikelets one or several flowered, sessile in 

 simple secund or unilateral spikes, which are either solitary or digitate, or 

 scattered on a common rhachis. Flowering glumes usually keeled, entire and 

 unawned, or with one, rarely three untwisted awns. 



