DESCRIPTIVE MANUAL 



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culms frequently branched near the base ; sheaths loose, smooth or 

 sometimes hispid; leaves broad and flat, 6 in.-l ft. or more long; 

 smooth or roughened, margin roughened; spikelets densely and ir- 

 regularly crowded in several rows along one side of the spikelike 

 branches of the panicle, 1% lines long, outer glume or bract from 

 ■!4:--V^ the length' of the spikelets, second and third glumes smooth, 

 pubescent or hispid along the nerves, fourth glume smooth, awn- 

 less or short awn-pointed. 



Distribution. — Barnyard grass is native to Iowa, also to other 

 parts of North America, and is quite generally distributed, par- 

 ticularly in barnyards, on shores of lakes, streams and in gardens, 

 but is most abundant in low places. 



Extermination — By thorough cultivation and preventing the 

 formation of seeds. 



\ Chemical Com,position. — Chemical analyses of this grass have 

 been reported from Iowa, North Carolina, South Dakota and 

 Mexico. Weems reports the following composition from Iowa ma- 

 terial. 



NATURAL CONDITION 



Pigeon Grass, Foxtail (Setaria glauca (L.) Beauv.). 



Description — An erect annual 1-2% ft, high; with flat leaves; 

 bristly cylindrical spike, from 1-3 in. long; heads slender; bristles 

 tawny yellow; small seeds conspicuously cross-striated and easily 

 distinguished from the next species because of their larger size 

 and by the eross-striation. 



Distribution. — This weed is quite generally distributed in the 

 United States, particularly in eastern states. It occurs every- 

 where in the state of Iowa, particularly in corn fields, where it 

 ex)mes up abundantly, after the corn is "laid by;" also in gardens 

 and in pastures, especially in the fall. 

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