HOW TO KNOW THE GRASSES 



Tribe V. AGROSTIDEAE. Spikelets consisting of 

 two glumes and a single fertile floret. There are 

 never any sterile or rudimentary florets. Spikelets 

 disarticulating above or below the glumes. In- 

 florescence an open or spikelike panicle. Fig. 14. 

 Pages 102-129. 



Figure 14 



Tribe VI. ZOYSIEAE. Spikelets various, usually 

 with one or two fertile and some rudimentary 

 sterile florets. The spikelets drop from the rachis 

 of the inflorescence in little groups. A small 

 tribe, mostly found in the dry regions of the 

 Southwest. Inflorescence spikelike. Fig. 15. 

 Pages 129, 130. 



Figure 15 



Tribe VII. CHLORIDEAE. Spikelets with one 

 to several florets, arranged in two rows 

 on the under-side of one to many spikes. 

 Fig. 16. Pages 131-143. 



Figure 16 



Tribe VIII. PHALARIDEAE. Spikelets with enlarged 

 glumes and one perfect terminal floret, with one 

 or two staminate or sterile florets or little scales 

 below it. The sterile florets fall attached to the 

 perfect one. Disarticulation above the glumes. 

 Fig. 17. Pages 144, 145. 



Figure 17 



Tribe IX. ORYZEAE. Each spikelet consists of a single 

 fertile floret. The glumes are lacking or reduced to 

 minute ridges at the tip of the pedicel. Fig. 18. Pages 

 146, 147. 



Figure 18 



11 



