182 BULLETIN 772, U. S. DEPARTMENT OF AGRICULTURE. 



times sufficiently abundant locally to be an important forage 

 grass, and is not infrequently used for hay. The European 

 form has 2-flowered 

 spikelets. 



90. SPARTINA Schreb. 



Spikelets 1-flow- 

 ered, much flattened 

 laterally, sessile and 

 usually closely im- 

 bricate, on one side 

 of a continuous ra- 

 chis, disarticulating 

 below the glumes, 

 the rachilla not pro- 

 duced beyond the 

 floret; glumes 

 keeled, l-nerved 5 



FIG. 108. Slough-grass, Beckmannia erucaeformis. 



X 5. 



Plant, X 



spikelet and floret, 



