IMPORTANT POISONOUS PLANTS 109 



California. Said to be poisonous to cattle. Also the D. nudicaule which 

 has narcotic properties. 



Delphinium menziesii DC. Western purple larkspur. 



Common in Montana and Westward. According to Drs. Wilcox and Chest- 

 nut it is poisonous, although Dr. Nelson fed 24^4 pounds of fresh leaves to 

 sheep without injury. Montana and west. 



Delphinium geyeri Greene. Wyoming Larkspur. 



Common in Wyoming, Colorado, and Nebraska. It is known as the 

 poison weed. 



Delphinium recurvatum Greene. Larkspur. 



Common in Southern California. Said to be fatal. 



Delphinium scopulorum Gray. Tall Mountain Larkspur. 



Rocky Mountains to Canada. The Canadian Department ot Agriculture 

 states that it is poisonous to cattle. 



Delphinium trolliifolium Gray. 



Common along the Pacific Coast, especially California, Washington, and 

 Oregon. It is known as cow poison in Humboldt county, California. Chesnut 

 says perhaps it is not equally poisonous throughout all stages of its growth. 



Aconitum uncinatum L Wild Monk's-hood. 



Native to a limited area in northeastern Iowa, Wisconsin and Eastward 

 Contains aconitin. Root, flowers and leaves are poisonous. 



Aconitum napellus L. European aconite. 



Commonly cultivated in gardens. This plant is powerfully toxic ; it con- 

 tains several important alkaloids, as aconitin, pseudoaconitin, and aconin. Bod- 

 ily heat is reduced by aconite. Winslow states that the smallest fatal dose to 

 a man is a teaspoonful of aconite, equivalent to about gr. XXX of the crude 

 drug. The minimum lethal quantity of aconitin is 1-16 of gr. for man. Large 

 doses produce death by paralyzing the heart. 



Aconitum columbianum Nutt. 



Common in the Rocky Mountains and westward. In swamps near springs 

 and banks at higher altitudes in Colorado and Utah. 



Aconitum noveboracense Gray. Aconite. 



Northern States. 



Aconitum reclinatum Gray. Trailing Wolf's-bane. 



Alleghany Mountains. 



Helleborus viridis L Green Hellebore. 



This plant is sometimes an escape from cultivation from Long Island to 

 West Virginia. All parts of the plant are poisonous and have long been so 

 recognized in Europe. 



Anemone nemorosa L. Wood Anemone. 



The common wind flower is said to be a local irritant. Common in woods 

 of N. States. 



Anomene patens, var. Wolfgangiana, (Bess.) Koch. Crocus, Sand flower. 

 Pasque flower. Wind flower. 



This plant is local in central and southern Iowa, but in northern Iowa it 

 is common on gravelly knolls, also in 111., Wis., British America, Rocky Moun- 

 tains, Nebr., Col., New Mexico. It is a well known irritant containing the 

 bitter substance anemonin. 



Clematis virginiana L Virgin's bower. 



This plant is widely distributed in the state along with other species of the 



