GENERA OF GRASSES OF THE UNITED STATES. 
57 
3-ner.vedj the lateral nerves sometimes faint or obscured by stria- 
tions and intermediate nerves; lemmas closely imbricate, firm, the 
pistillate coriaceous, the margins bowed out near the base, acute or 
acutish, 3-nerved, with several intermediate nerves or striatums; 
palea as long as the lemma or shorter, the pistillate coriaceous, in- 
closing the grain. 
