MANUAL OF THE GRASSES OF THE UNITED STATES 



577 



times approximate on a short axis 

 3 to 6 cm. long, at maturity spreading 

 or curved, the rachis flat, winged, 

 about 0.7 mm. wide ; spikelets closely 

 set, elliptic, acutish, minutely pubes- 

 cent, about 1.5 mm. long; first glume 

 wanting; second glume about three 

 fourths as long as the spikelet ; sterile 

 lemma as long as the spikelet, with 



Figure 827. — Digitaria sanguinalis. Plant, X X A', two 

 views of spikelet, and floret, X 10. (Norton 566, 

 Kans.) 



Figure 828. — Digitaria horizontalis. Plant, X 1; 

 spikelet and floret, X 10. (Nash 996, Fla.) 



