WEEDY GRASSES 



163 



forming a clinging mat. Crab grass is found throughout 

 the Southern States and extends less abundantly into 

 many of the Northern States. It is rare in the Western 



36. Crab Grass. The upper part of a flower stem with six 

 spikes of flowers. 



States. Crab grass is a good forage plant in the South 

 and is not infrequently utilized for hay. The seed is 

 not sown but volunteer growth is used. The less com- 

 mon Syntherisma ischaemum is distinguished by its 

 smooth sheaths. 



