8 DEPARTMENT OF AGRICULTURE BULLETINS 101-125. 



Department Bulletin 125. — Zygadenus, or Death Camas: Page. 



Introduction 1 



Description of zygadenus 4 



Common names of zygadenus 6 



Poisonous species of zygadenus '. . . . 6 



Losses of live stock by zygadenus 6 



Animals poisoned by zygadenus 7 



Symptoms produced by zygadenus poisoning 7 



General statement of experimental work 8 



Symptoms in sheep observed at the Greycliff station 24 



Symptoms in horses and cattle 29 



Autopsies 29 



Toxic and lethal dose of zygadenus venenosus for sheep 30 



Experiments with horses and cattle 34 



Comparative toxicity of different species of zygadenus 35 



Does toxicity vary with locality? 35 



Effect of repeated feeding in producing immunity or increased suscepti- 

 bility 37 



Remedies 37 



Methods of preventing losses 43 



General summary 44 



Literature cited 45 



