IMPORTANT POISONOUS PLANTS 113 



This species is occasionally cultivated and sometimes spontaneous; the 

 milky juice contains some poisonous alkaloids, as papaverin and codein. 



Papaver dubium L. Long Smooth-fruited Poppy. 



Cultivated; native to Europe, naturalized in Eastern North America. 



Papaver orientale L. 



This handsome, showy plant is frequently cultivated for ornamental pur- 

 poses and contains a large amount of milky juice. This plant must be re- 

 garded as suspicious. 



Argemone mexicana L. Mexican Prickly Poppy. 



The Mexican prickly poppy, with pale yellow or yellowish petals, is culti- 

 vated in gardens. The latex not only contains narcotic principles, but the 

 prickly pods sometimes cause mechanical injury and set up inflammation. The 

 latex contains morphin ; common in Texas to Kansas. 



Argemone intermedia Sweet. 



This prickly poppy of the plains contains a narcotic substance in its latex. 

 The prickly leaves of the plant cause serious mechanical injury and inflam- 

 mation. Common from Nebraska to Utah, Kansas and west. 



Sanguinaria canadensis (Dill) L. Bloodroot. 



This widely distributed plant of Eastern North America is well known to 

 nearly everyone. The root is poisonous and contains the principle sanguin- 

 arinae, found in the red latex. It is sharply irritating, especially to mucous 

 surfaces. Contains the alkaloid sanguinarin. 



Chelidonium ma jus L. 



Celandine is occasionally cultivated and spontaneous eastward. The orange 

 yellow juice or latex is an irritant. The fresh juice produces inflammation 

 and blisters, and it poisons the skin if handled so as to crush the leaves or 

 stem. Contains chelerythrin C 01 H 17 NO 4 , with a burning taste, and glaucin. 



Stylophorum diphyllum (Michx.) Nutt. Celandine Poppy. 



Common from Wisconsin to Tennessee and Pennsylvania. According to 

 Schlotterbeck this plant contains the following substances which are regarded 

 as injurious: protopin, stylopin, sanguinarine and others. 



Eschscholtzia Douglasii (Hock & Arn.) Walp. 



Narcotic used to stupefy fish. California. 



Fumariaceae. 



Fumaria officinalis L. Fumitory. 



It has long been regarded as poisonous in Europe. Naturalized in waste 

 places eastward. 



Corydalis aurea Willd. Golden Corydalis. 



A related exotic species which is said to be very poisonous. The above 

 species and others of the family have been considered poisonous. 

 Cruciferae. Mustard Family. 



Lepidium sativum L. Garden Cress. 



Native to Europe, but occasionally escaped from cultivation. The Garden 

 Cress is used as greens. It is a local irritant. 



Lepidium apetalum Willd. Small Pepper -grass. 



Widely distributed in this state, and like the other pepper-grasses, may 

 produce sinapism. 



Radicula armoracia (L.) Robinson. Horse-radish. 



This is poisonous, like the preceding species of this order that have been 



