GRA.SSES OF IOWA. 



375 



free extract varies from 33.12 to 49.55 per cent and the results 

 are irregular for the successive periods of growth. The ash 

 varies from 10.24 to 14.84 per cent and is highest in the young 

 samples. 



The above results are supplemented by the selection of 

 other analyses of this grass from other sources. 



IN FRESH OR AIR-DRY MATERIAL. 



WATER FREE SUBSTANCE. 



Sample 1 I 3.40 



Sample 2 i 3.40 



Sample 3 2.07 



FALSE COUCH GRASS. 



The false couch grass {Agropyron pseudo-re pens) is very 

 closely allied to the common quack grass, as its name indi- 

 cates. It produces tall and leafy stems, which are much softer 

 than those of A. occidentale. It occurs in moist meadows in 

 this state. It forms compact bunches, with stout stems grow- 

 ing from about eighteen inches to two and a half feet tall. 

 The spikes are from four to seven inches long and somewhat 

 stouter than in quack grass, the aw^ns being very short. This 

 is an excellent forage plant. It is indigenous from central 

 Iowa northward. Thus it occurs in the vicinity of Jewell 

 Junction, and is reported also by Mr. R. I. Cratty from the 

 northern part of the state. 



OTHER WHEAT GRASSES. 



The Agropyron tenernm, Vasey, though not a native to -many 

 parts of this state, has been naturalized in many places, as in 

 eastern Iowa. It is native to northwestern Iowa. This per- 

 ennial grass produces an abundance of sof o leaves and stems, 



1. U. S. Dept. Agrl. Exp. Sta. Bull. 11:30. 



2. Bull. Agrl. Exp. Sta. S D. 40: 148 



