186 



VETEKINAEY HYGIENE 



who found that Lolium was only poisonous to horses in con- 

 siderable doses, two to six pounds, more than is ever likely 

 to be obtained by ordinary grazing or in hay. The poison 

 is known as Temuline and is said not to affect oxen, but 

 poisons other animals, including man. It produces vertigo, 

 and symptoms of loss of co-ordination. 



Fig. 49. — Darnel {Lolium temulentum) . 



These are not the only poisonous grasses. Bromus 

 catharticus is a purgative, Festuca quadrivalvis, a grass grow- 

 ing in Peru, and the Molinia ccerulea, a common upland 

 grass in Europe, are both poisonous to cattle. In Mongolia 

 a species of Sti2}a intoxicates horses, while in New Mexico 



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