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, iy 2 lines long, outer glume or bract from 

 VatV-2 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 Composition. — 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 (Set aria glauca (L.) Beauv.). 



Description — An erect annual l-2 1 /o 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 cross-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 

 comes up abundantly, after the corn is "laid by." also in gardens 

 and in pastures, especially in the fall. 

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