866 THE AMERICAN NATURALIST. 
Since reading the above concerning Martynia, J. B. S. Norton, 
of the Botanical Garden, St. Louis, informed me that he had 
often seen the points hanging on the feet of cattle or horses 
on the prairies of Kansas, where the plant in many places has 
become a bad weed. In some instances several points were 
seen attached to one foot. 
MICHIGAN AGRICULTURAL COLLEGE. 
