796 



MANUAL OF POISONOUS PLANTS 



commonly found when this forage is cut for hay. It is extremely doubtful 

 whether the Senecio occurring in the western part of Iowa is responsible for 

 this disease. The groundsel or mug-wort {Senecio ^alsamitae) blooms in May 



Fig. 454a. Burdock (.Arctium Lappa). 1, general view of plant; 2, single flower; 3, 

 scales of involucre hooked. These heads annoying to stock. (U. S. Dept. Agrl.) 



