GENERA OF GRASSES OF THE UNITED STATES. 



151 



Montana and Texas. Sporobolus wrigJitii Munro, saccaton , is much 

 taller, with a large but narrow panicle. This is found from Arizona 

 to western Texas. 



Most of the per- 

 ennial species of 

 Sporobolus are pal- 

 atable forage, 

 grasses, but few 7 of 

 them are abundant 

 enough to be of im- 

 portance. On the 

 Arizona Plateau, S. 

 interruptus Vasey 

 is an important 

 range grass. It is 

 called black sporo- 

 bolus, because of 

 the dark, narrow, 

 loosely flowered 

 panicle. 



70, BLEPHARONETJKON 

 Nash. 



Spikelets 1 -flow- 

 ered, the rachilla 

 disarticu lating* 

 above the glumes; 

 glumes subequal, 

 rather broad; 

 lemma 3-nerved, 

 the nerves densely 

 pilose ; palea 

 densely pilose be- 

 tween the two 

 nerves. 



A perennial grass 

 with an open, nar- 

 row panicle. Spe- 

 cies one ; southwest- 

 ern United States 

 and northern Mex- 

 ico. 



Type species: Vilfa 

 tricholcpis Torr. 



Blepharo neuron 

 Nash, Bull. Torrey 

 Club 25: 88. 1898. 

 Only one species men- 

 tioned, B tricholepiS FIG. 85. Saud dropseed, Nporo&oZus cryptandrus. Plant, 

 (Tor.) Nash. X i; spikelet and floret, the palea splitting, X 5. 



