LOCO WEEDS AND OTHER POISONOUS PLANTS 73 



way, butting into other animals and objects. If the sheep does not die in 

 the period of excitement, it staggers until it falls, then lies in a stupor, 

 which in fatal cases gradually grows more pronounced. The pulse and 

 respiration are very high in the acute stages of poisoning, but there is no 

 effect on the temperature except in prolonged cases where the temperature 



PIG. 29. Loco Weed (Aragallus (Oxytropis) Lamberti) natural size. (After Blank- 

 inship, J. W.: The Loco and some other poisonous plants in Montana Agricultural 

 Experiment Station, 1903, p. 80, originally after U. S. Department, of Agriculture.) 



gradually falls to between 98 and 99F. The symptoms may appear in 

 i or 2 hours after the food is eaten, or in other cases nearly 24 hours may 

 elapse. Death may follow quickly, or the animal may live for 2 or 3 days. 

 The result of autopsies show the peripheral blood vessels strongly 

 congested. The left heart is strongly contracted, the lungs and liver 



