86 BULLETIN 365, U. S. DEPARTMENT OF AGEICTJLTTJRE. 



and climatic conditions may delay the time of blossoming, so that 

 no arbitrary date can be given when a' range is safe. D. hioolor 

 probably never grows in sufficient quantities to be dangerous as a 

 poisonous plant. Inasmuch as the experimental work seems to show 

 quite conclusively that sheep may feed upon larkspurs with entire 

 impunity it is desirable in some cases, where there is an especial 

 abundance of larkspur, to use the ranges for sheep rather than for 

 cattle or to combine sheep grazing and cattle grazing in such a man- 

 ner as to keep the areas of low larkspur eaten down by the sheep. 



