PLANTS POISONOUS TO STOCK. 



233 



permanganate 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 geyeri. — The Wyoming larkspur is well known through- 

 out AYyoming, Colorado, and Nebraska under the name of poison weed. 



Fig. 84. — Dwarf larkspur {Delpliinium 

 tricorne), one-third natural size. 



Fig. 85. — Cursed crowfoot (Banu7iculus 

 scelerahis.) 



It is reported to be the most troublesome plant to stock in Wyoming, 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 fatal 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 



