IMPORTANT POISONOUS PLANTS 135 



Occasionally cultivated in the north, but scarcely hardy. Poisonous like 

 the preceding. 



Bignonia capreolata L. Cross Vine. 



A tall climbing vine with large orange colored flowers; from Virginia to 

 Louisiana. Said to be poisonous. 



Tecoma radicans (L) Juss. Trumpet Creeper. 



Climbing vine, large tubular orange and scarlet flowers. New Jersey to 

 Iowa, Texas to Florida. Said to be poisonous, several exotic species are poison- 

 ous. 



Rubiaceae. Madder Family. 

 Cephalanthus occidentalis L. Buttonbush. 



This plant commonly occurs in low grounds, especially along river courses. 

 The leaves contain a poisonous principle, cephalanthin, a very bitter glucoside. 



Caprifoliaceae. Honeysuckle Family. 



Triosteiim perfoliatum L. Feverwort, Horse-gentian. 



Widely distributed in woods. Some species of the genus were used by the 

 Indians as a cure for fevers and early practitioners in this country used the 

 root as an emetic. The physiological action of the plant is to produce vomiting. 



Sambucus canadensis L. Elderberry. 



Dr. Rusby states that the plant is poisonous. The elderberry is widely dis- 

 tributed in the U. S. and the flowers of this are commonly used to prepare a tea. 

 Contains coniin. 



Sambucus racemosa L. Red-berried Elder. 



Northern states and Rocky Mountains. Northeastern Iowa. Suspected. 



Symphoricarpos orbiculatus Moench. Coral-berry. 



Common in the south, occurring on sterile or rocky soils and on borders of 

 woods. Reported as poisonous. 



Symphoricarpos mollis Nutt. Coral Berry. 



This plant is said to contain saponin according to Greshoff. The S. race- 

 mosus Michx. Snowberry. Across the continent northward. Greshoff found 

 saponin in leaves but not the fruit. Cases of poisoning have been reported in 

 the old world. 



Lonicera involucrata (Richards) Banks. Rocky Mountain Honeysuckle. 



Common in the Rocky Mountains. It is said to contain saponin in con- 

 siderable amounts. Several other species contain saponin and may be regarded 

 as poisonous. 



Diervilla Lonicera Mill. Bush Honeysuckle. 



Common in woods, north. Not reported as poisonous, but the Japanese D. 

 Japonica DC is regarded as poisonous. It contains saponin. 



Cucurbitaceae. Gourd Family. 



Some of the exotic genera of this family, like the Bryonia dioica known as 

 the poison berries, and the Trichosanthes palmata, are poisonous. 



Sicyos angulatus L. Bur Cucumber. 



Eastern North America. The barbed prickles are irritating and injurious 

 to many persons according to Dr. Halsted. 



Boleria sp. 



One or more species of the genus regarded as poisonous in California ac 

 cording to Chesnut. 



