370 PASTURE MANAGEMENT AND LIVESTOCK PRODUCTION 



X. Comparative forage-value classification of im- 

 portant species of broad-leaved plants. 



Y. Ecological classification of important broad- 

 leaved forage species pertinent to range manage- 

 ment. 



5. Objectionable plants. 



A. Poisonous species. 



a. Important families containing most poison- 

 ous species. 



b. Conditions under which serious poisoning 

 occurs. 



c. General directions for controUing losses 

 from poisonous plants. 



(i) Handling stock, proper class of stock, 



improved range husbandry, etc. 

 (2) Eradication of poisonous species. 



d. Principal poisonous species. 



(i) Discussion of important species em- 

 braced in the most troublesome 

 genera, viz., Delphinium, Zygadenus, 

 Cicuta, Lupinus, Astragalus, and 

 Oxytropis. 



(A) Distribution and habitat. 



(B) Losses of stock and animals 

 poisoned. 



(C) Amount required to cause 

 death. 



(a) Leafage. 



(b) Seed. 



(c) Root. 



(D) Symptoms, remedies, and 

 control. 



e. Species of secondary or local importance. 



B. Mechanically injurious plants. 



a. Extent and character of injuries. 



b. Season of greatest injury, and localities 

 where losses are heaviest. 



