38 



MANUAL OF POISONOUS PLANTS 



with the Loco disease of the United States. Many forage plants of excellent 

 repute such as white clover, alfalfa, lotus and other plants, may produce 

 tympanites. 



Fig. 8. Common Horsetail (Bquisetum arvense), the plant causing E)quisetosis. 1. Fer- 

 tile stems terminating in cones a. 2, Sterile stem. a. rhizome tubers. 3. Sporophyl with 

 sporangia. 4. Sporangia opened to discharge spores. 5, 6, 7. Spores with spiral elaters. 

 After Wossidlo. 



Symptoms: difficult breathing; the poison enters the circulation and stops 

 the action of the lungs and heart when the animals stagger and die. 



