GENERA OF GRASSES OF THE UNITED STATES. 
97 
glumes reduced to short or minute awns, the first usually obsolete, 
both often wanting in the upper spikelets; lemmas convex, rigid. 
Fig. 48. — Sitanion hystrix. Plant, X I spikelet with rachis joint attached and floret, 
X 3. 
tapering into long awns, 5-nerved, the nerves obscure except toward 
:he tip ; palea about as long as the body of the lemma. 
97769°— 19— Bull. 772—7 
