GRASSES OF IOWA. 



389 



CHEMICAL COMPOSITION. 



The sample of this grass gave the following results on 

 analysis: 



NATURAL CONDITION. 



WATER FREE SUBSTANCE. 



Sample . 



3.09 I 6 07 I (5.73) | 39.90 | 10.46 | 40.48 



The following analyses from other stations are given for 

 comparison: 



AIR-DRY CONDITION. 



New Mexicu (1) 



North Carolina (2) 



South Dakota (3), Aug. 8, 1892. 



!^2 



O *3 



h X 



43.20 

 46.34 

 37.90 



WATER FREE SUBSTANCE. 



North Carolina (2) 

 South Dakota (3),.. 



8.71 

 10.09 



4.88 

 10.22 



36 12 

 35 57 



1.15 

 2.90 



49.13 

 41.20 



Tickle grass or old witch grass (Panicum capillare) is an 

 annual with coarse, branching stems, from one to three feet 

 high, with hairy sheaths and leaves. The panicles are widely 

 spreading. This is extremely common throughout the state, 

 especially in old cultivated fields, frequently becoming a weedy 

 plant. It possesses very little value as z. forage plant. 



CHEMICAL COMPOSITION. 



But one specimen was analyzed in the station laboratory: 



1. New Mexico Agrl. Exp. Sta. Bull. 17. 1895. 



2. North Carolina Agrl. Exp. Sta. Bull. 90 b. 1893. 



3. South Dakota Agrl. Exp. Sta. Bull. 40:38. 



