IMPORTANT POISONOUS PLANTS 



119 



This plant is frequently cultivated in the north and west, and in numer- 

 ous places is an escape from cultivation. Native to N. Y. and Alleghany Mts. 

 The roots, leaves and bark are very poisonous to man. Contains robinin. 



Robinia viscosa Vent. Clammy locust. 



Cultivated as an ornamental plant; the roots are somewhat poisonous. 



Astragalus mollissimus Torr. 



A loco-weed from Neb. to New Mexico and Wyoming. 



Astragalus hornii A. Gray. 



Poisonous in Arizona and adjacent regions. 



Oxytropis lamberti Pursh. Stemless Loco Weed. 



Found in the western part of Iowa, along the Missouri River and its- 

 tributaries, very abundantly. One of the conspicuous loco or crazy weeds of 

 the west. 



Coronilla varia L. Coronilla. 



An escape from cultivation in the West. It has long been regarded as a 

 poisonous plant in Europe. 



Fig. 19d. Chick Pea (Cicer arietinum) said to 

 be poisonous. 



Phaseolus lunatus Linn. Lima bean. 



Investigations carried on in Europe seem to indicate that the lima bean 

 leaves in the wilted condition contain hydrocyanic acid. According to Guig- 

 nard practically all varieties, whether wild or cultivated, were found to con- 

 tain a principle which when acted upon by an enzyme yields hydrocyanic acid. 

 Prolonged boiling, however, extracts the greater part of it, but it is not 

 destroyed, consequently this water should not be used, as it contains the sub- 

 stance which is converted into hydrocyanic acid. 



Phaseolus multifiorus Willd. Scarlet Runner. 



