EXPERIMENT STATION BULLETINS. 



291 



Fig. 23 (24). 



Pigeon Grass. Green Foxtail. Setaria 

 viriclis (L.) Beaiiv. {Chaetochloa viridis (L.) 

 Nash.) Stems erect, 30-60 cm. high. Sheaths 

 not compressed, not tinged with red; blades 

 flat, not twisted. Spike-like panicle erect, 

 green, nearly cylindrical, 3-8 cm. long, bristles 

 for each spikelet 1-5, often 10 mm. long, barbed 

 upwards. Very common in cultivated fields, 

 oftener met with in clover seed than any other 

 weed. It much resembles small plants of 

 Hungarian grass; naturalized from Europe. 



Fig. 24 (23; 



Pigeon Grass Yellow Foxtail. SeUirin 

 glavca (L.) Beauv. (Chaetochloa glauca (L.) 

 Scrib.) Stems erect, compressed below, 30-60 

 cm. high; sheaths loose, compressed, more or 

 less tinged with red; blades flat twisted. Spike 

 stiff, simple, cvlindrical usually tawny yellow. 

 5-10 cm. high, awn-like branches, 6-13, barbed 

 upwards. 



A common annual weed found in culti^'ated 

 ground and waste places in many regions of 

 the world. It starts much later than oui 

 other species of pigeon grass, S. viridis. Ir- 

 troduced from Europe. 



