172 



Fig. 468. Sporobolus simplex Scribn. U. S. Dept. Agr. Div. 

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

 seed. — A low, densely ciespitose, leafy aunual 0.5 to 1.5 dm. 

 high, with smooth culms, short, fiat 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 are hardly one-half as 

 long as the mucronate-pointed flowering glumes. — Moist places 

 in the mountains of Colorado and Idaho. July-September. 



