FINDING NATURE’S TREASURES 
167 
“Fred, if you will get me a little piece of one of the 
plants, I shall show you why it gets its name.’ > 
Fred picked a piece of a plant and gave it to Uncle 
Jack. 
“Now, see the sap comes out,” Uncle Jack said as he 
broke one of the leaves. “The sap of the smart weed does 
not taste good. It smarts or burns when you get some 
in your mouth. If you get very much in your mouth, it 
hurts. The cows soon learn to leave it alone. Fred, are 
you brave enough to taste a very little bit of the sap, if 
I do? 
“Yes,” answered Fred. The others then tasted a lit- 
