98 



6. Spikes 2-6, digitate 73. Cynodon 



6. Spikes many, very slender and distant along a common axis. 



(Bouteloua uniflora may be looked for here.) 



79. SCHEDONNARDUS 



7. Spikelets with 1 hermaphrodite floret, and 1 to several empty 



glumes or awns above 8 



7. Spikelets with 2 to several hermaphrodite florets 11 



8. Spikes digitate or closely approximate; occasionally in appar- 



ent whorls 9 



8. Spikes remote, or the lowest only approximate 10 



9. Flowering glume of the perfect flower with a single awn, or 



awnless 76. Chloris 



9. Flowering glume of the perfect flower with 3 awns. 



77. Trichloris 



10. Spikelets remote; upper sterile glumes reduced to simple awns. 



78. Gymnopogon 



10. Spikelets crowded; prolongation of the rachilla triaristate. 



80. Bouteloua 



11. Spikes few, stout 12 



11. Spikes slender, usually numerous 13 



12. Axis of the spikes terminated by a spikelet; empty glumes awn- 



less 82. Eleusine 



12. Axis of the spikes projecting beyond the spikelets; empty 



glumes, at least the second one, strongly mucronate or awn- 

 pointed 83. Dactyloctenium 



13. Spikes crowded or fasciculate near the apex of the culms, 



flowering glumes long awned 77. Trichloris 



13. Spikes alternating and more or less remote along the common 

 axis; flowering glumes narrow, entire, or 2-toothed, awned 

 or awnless 84. Leptochloa 



