96 



FIRST BOOK OF GRASSES 



4. AGROSTIDE^, timothy tribe 



Like Festucese reduced to its 



lowest terms; spikelets 1- 



flowered. 

 Lemmas awnless or awned, the 



awn from back or summit. 

 Glumes sometimes awned, 



sometimes suppressed. 

 Inflorescence a panicle. 

 [Contains redtop and 

 timothy.] 



FIG. 86. 



5. CHLORIDES, grama tribe 



Spikelets 1- to several-flowered, 

 sessile on one side of a con- 

 tinuous rachis. 



All but the lowest floret com- 

 monly sterile and variously 

 modified. 



Inflorescence of two to several 

 1-sided spikes, solitary, race- 

 mose or digitate. 

 [Contains grama-grasses.] 



FIG. 87. 



6. NAZIE^E, curly-mesquite 

 tribe. 



Spikelets 1- or 2-flowered, in 

 fascicles, the whole falling 

 from the main axis entire. 



[Not a natural tribe, some of 

 the genera included not 

 being closely related.] 



FIG. 88. 



