106 



beyond the flowers ; flowering glumes awnless or rarely 

 with a thin short awn. 

 Genus : L Aira. 



Subtribe EUAVENE.&. 



Spikelets two to many flowered ; rhachilla more or less produced be- 

 yond the flowers ; flowering glumes commonly with a dor- 

 sal or terminal geniculate awn. 

 Genera: 1. Corynephorus ; 2. Deschampsia ; 3. Holcus ; 4. 

 Dupontia ; 5. Graphephorum ; 6. Trisetum ; 7. Avena ; 8 

 Arrhenatherum ; 9. Danthonia. 



Tribe 4.— CHLORIDES. 



Spikelets one to many flowered, sessile and secnnd in two rows 

 along the rhachis of one-sided spikes. 

 Group 1. — One or rarely two fertile flowers in the spikelet. 



Genera: 1, Cynodon; 2. Ctenium; 3. Chloris ; 4. Trichloris; 

 5. Gymnopogon ; 6. Schedonnardus ; 7. Bouteloua. 

 Group 2. — Two to many fertile flowers in each spikelet. 

 Genera: 1. Eleusine; 2. Leptochloa ; 3. Bnchloe. 



Tribe 5.— FESTUCACEJE. 



Spikelets two to many flowered, variously paniculate or rarely 

 racemose. Flowering glumes awnless, or terminated by one to many 

 awns. 



Subtkibe 1.— PAPPOPHOREiE. 



Spikelets usually few-flowered ; flowering glumes three to many 

 awned. 



Genera : 1. Pappophorum ; 2. Cottea. 



Subtkibe 2.— TRIODIEJE. 



Spikelets many-flowered, rarely one or two flowered, rhachilla gla- 

 brous or short pilose ; glumes one to three nerved, or rarely 

 many-nerved, three- toothed, three-divided, or three-awned. 

 Genera : 1. Triodia ; 2. Diplachne ; 3. Triplasis ; 4. Eremb- 

 chloa ; 5. Scleropogon. 



