PLANTS POISONOUS TO STOCK. 



233 



peniuuiganate of potash in the form of a drench : 5 to 10 grams for an 

 adult sheep or pig, 15 to 20 grains for a horse, and 30 to 50 grains for an 

 ox, dissolved in a pint or two pints of water. 



* Delphinium ge:yeri.— The Wyoming larkspur is well known through- 

 out ^Yyoming, Colorado, and Nehraska under the name of poison weed. 



Fig. 84. — Dwarf larkspur (Drljihiniian 

 tricorne), one-third natural size. 



Fi(i. S.5. — Cursud crowfoot (Eanunciiliis 



scclcratnu.) 



It is reported to he the most troublesome plant to stock in AVyoming. the 

 dark-green tufts of foliage being especially tempting in spring when the 

 prairies are otherwise dry and barren. 



Delphinium recuryatum. — This species of larkspur grows in wet sub- 

 saline soil in the southern half of California. It has been reported from 

 San Luis Obispo county as fahil to animals. 



Delphinium scopulorum. — The tall mountain larkspur of the Eocky 

 Mountains has been reported to the Canadian Department of Agriculture 

 as poisonous to cattle in the high western prairies of Canada. 



Delphinium trolliifolium. — This plant is common throughout the 

 coast region of northern California, Oregon, and Washington. In 



