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, 
y MING > 
SOO 
lia. 48.—Sitanion hystriz. Plant, % 4; spikelet with rachis joint attached and floret, 
3 
tapering into long awns, 5-nerved, the nerves obscure except toward 
the tip; palea about as long as the body of the lemma. 
97769°—19—Bull. 772——_7 
