14 



February one and two ounces produced no symptoms, while three 

 ounces caused death. The leaves were then about two to three inches 

 tall and the leaflets were not yet unfolded. The results indicate that 

 the leaves at this stage of development are almost as deadly as the 

 tubers. 



In April three feedings were made. Feedings of three and four 

 ounces gave negative results, while eight ounces caused death. The 



Figure 7. The Poison Parsnip Growing in a Wet Meadow. In such 

 locations the plant is easily grubbed out, and the cost of a single 

 poisoned animal would more than pay for the labor required to 

 clear a large area. 



leaflets were now beginning to unfold and the leaves were becoming 

 less toxic. 



Early in May two feedings were made of leaves from which all parts 

 which had not turned green were removed. One feeding was of one 

 pound, and the other of 2J pounds. No symptoms were produced from 

 either feeding. The following day the white and yellow parts, amount- 



