172 



Fig. iCyS. Sporobolus simplex Scribn. U. S. Dept. Agr. Div. 

 Agros. Bull. 11 : 48, fig. 6. July, 1898. Mountain Drop- 

 seed. A low, densely ctespitosc, leafy annual 0.5 to 1.5 dm. 

 high, with smooth culms, short. Hat leaves, and linear panicles 

 2 to 4 cm. long. Spikelets 2 to 2.3 mm. long, with broadly ob- 

 tuse or truncate empty glumes (a), which arc hardly one-lialf as 

 long as the uiucronate-pointed flowering glumes. Moist places 

 in the mountains of Colorado and Idaho. July-Sei)teml)er. 



