QUESTIONS 271 



species in each group, (b) To what extent do the larkspurs cause poisoning 

 (i) of cattle and (2) of sheep? On what type of range do larkspurs commonly 

 grow? 



4. (a) What parts of the larkspur plant are poisonous to stock, and at 

 what time in the season is poisoning most liable to occur? (b) What amount 

 of larkspur must cattle ordinarily consume to cause death? (c) What are 

 the symptoms of larkspur poisoning? (d) Discuss fully the remedial and 

 preventive measures recommended for the control of larkspur poisoning. 



5. (a) How would you recognize death camas? (b) Are all species of 

 Zygadenus poisonous? (c) What parts of the plant are believed to contain 

 toxic substances? {d) What grazing animals are most seriously affected by 

 the grazing of death camas? {e) What amount, by weight, of death camas 

 must be consumed by sheep to cause death? 



6. (a) What are the typical symptoms of death camas poisoning? {b) 

 What remedial or preventive measures should be recognized on the range? 



7. (a) Describe the characteristics of water hemlock, {b) What is the 

 distribution and habitat of the genus Cicuta? (c) To what extent are grazing 

 animals poisoned by water hemlock? {d) What parts of the plant are poison- 

 ous? 



8. (a) How would you recognize the symptoms of water hemlock poison- 

 ing? {b) Discuss fully the control and prevention of losses from water hemlock 

 on the range. 



9. (a) Under what conditions should lupines be listed as poisonous plants? 

 {b) What parts of the lupine plant are to be suspected as poisonous? (c) To 

 what extent are foraging animals poisoned by eating lupine? {d) What 

 amount of the poisonous parts of lupines must be consumed by sheep to cause 

 death? How are cattle affected by grazing on lupine? 



10. Discuss fully the symptoms and methods of control of lupine poisoning 

 on pasture lands. 



Note. — The bibliography for the general subject of stock-poisoning 

 plants is placed at the end of Chapter XIV (page 289). 



