GRASSES OF IOWA. 



427 



NATURAL CONDITION. 



Cut in September . 



17 31 



WATER-FREE SUBSTANCE. 



2.82 I 9.69 I (7. 01) | 34.43 I 10.94 i 42.12 



The following analysis is given for comparison with the one 

 from this station: 



WATER-FREE SUBSTANCE. 



The same sample contained 56.37 per cent of water in its natural condition. 



Stink Grass {Eragrostis major, Host.) is naturalized from 

 Europe and is widely distributed in Iowa. It emits a strong 

 unpleasant odor and cannot be considered of any agricultural 

 value The E. PursTdi, Schrad, is a native grass throughout 

 the state, particularly in flood plains of streams, along road- 

 sides and in waste places. It is not regarded as having any 

 value for forage purposes. 



Green Pox-tail or Pigeon grass {Setaria viridis, Beauv.) is 

 common throughout the state. It springs up in corn fields 

 after the last cultivation, and affords a small amount of pick- 

 ing after the corn is removed. It is, however, of doubtful 

 value as a forage plant under such conditions. It is also com- 

 mon in stubble fields and when cattle are turned into these it 

 affords forage of much greater value. Pigeon grass is native 

 to Europe. This annual grass is now extensively naturalized 

 in all settled parts of the United States, as well as Australia. 

 The spike is quite compact with numerous spikelets, with 

 bristles longer than the spikelet. The bristles are green. 



1. U. S. Dept. Agrl., Exp. Sta. Rec. 6:1C1. 



