60 FIRST BOOK OF GRASSES 



no special difficulty, except those of buffalo-grass, 

 to be studied later. 



SUMMARY 



In this group the spikelets are sessile in 1 -sided 

 spikes, solitary, digitate, or racemose. In most of 

 the genera the upper florets are sterile, their lemmas 

 greatly modified, or they are wholly suppressed. 



REVIEW 



Collect the inflorescence of Bermuda-grass, yard-grass, any 

 of the grama-grasses, or of any available grass with 1-sided 

 spikes. Note the arrangement of the spikes on the main axis; 

 distinguish the individual spikelets and identify their parts. 



