72 SOURCES OF NECTAR 
posed to be poisonous, and is commonly reported to cause the 
disease known as trembles in animals. Although much of this 
plant grows in the author’s wild garden (Fig. 37), and also about 
the grounds where it is frequently eaten by the family cow, no 
bad effect has ever been noticed. 
Milk sickness is said to be caused by the use of meat, milk, 
Fic. 37.—Masses of white snakeroot in the author's wild garden. 
butter or cheese from animals afflicted with trembles, so that 
snakeroot is popularly supposed to be the indirect cause of milk 
sickness in the human race, as well as trembles in animals. 
Tn his book on poisonous plants, Dr. L. H. Pammel cites a 
number of cases where the disease, trembles, had supposedly been 
produced in animals by feeding them the extract of this plant. 
