IMPORTANT POISONOUS PLANTS 127 



Daucus carota L Carrot. 



The carrot, like the parsnip, causes vesication. Dr. Schaffner says that 

 persons handling the plant are often poisoned, especially when the plant is 

 wet with dew. 



Cornaceae. Dogwood Family. 



Cornus paniculata L'Her. Dogwood. 



Widely distributed in the north. Some regard it as poisonous. 



Cornus paniculata L'Her. 



The fruits of this species are considered by some people to be poisonous, 

 but there are no authentic cases. 



Garrya Fremontii Torr. Dogwood. 



Contains an alkaloid. It may be of interest here to state that the Marlea 

 vitiensis of Australia and the Pacific Islands is poisonous. It would not be 

 strange, therefore, to find that some of the other members of this family are 

 poisonous. 



Ericaceae. Heath Family. 



Epigaea repens L Trailing Arbutus. 



North and East, Alleghany Mountains. Supposed to be poisonous. Con. 

 tains the glucoside ericolin. 



Andromeda polifolia L. Wild Rosemary. 



Arctic America, Adirondack Mountains and in Europe and Asia A. glau- 

 cophylla Link, is the Bog Rosemary, with whitish leaves found in bogs and wet 

 shores from Labrador to Minnesota, and the A. floribunda Pursh. is found in 

 moist hillsides in the Alleghany Mountains from Virginia to Georgia. These 

 plants contain andromedotoxin. 



Rhododendron maximum L. Large Rhododendron. 



Small shrub or tree from Nova Scotia to Ohio and the Alleghany Moun- 

 tains. R. catan'biense Michx., in the high Alleghanies from Virginia to Georgia, 

 known as the Mountain Rosebay, and the California Azalea {R. occidental?) 

 are known to be poisonous, the latter especially to sheep. 



Rhododendron californicum Hooker. California Rhododendron. 



From San Francisco to British Columbia. Cases of poisoning have been re- 

 ported from the Pacific Coast. 



Kalmia angustifolia L Lambkill. Laurel. 



Common on hillsides, pastures, and bogs, from Labrador southwest through 

 the Alleghanies. Known to be very poisonous. The leaves contain andro- 

 medotoxin ; frequent cases of poisoning on record. 



Kalmia latifolia L. Laurel. 



From New Brunswick to Ontario to Pennsylvania and south to the Alle- 

 ghanies. A well-known poisonous shrub. Many cases of poisoning of sheep 

 and cattle are on record from this species, probably the most poisonous of all 

 the members of this genus. K. polifolia Wang., found in bogs, with rose-pur- 

 ple flowers and pale colored leaves, is poisonous. 



Ledum glandulosum Nutt. Labrador Tea. 



Common in bogs of the Northern Rockies, the Cascade Mountains to Cali- 

 fornia. It is said to be poisonous. L. groenlandicum Oeder.. with white flow- 

 ers and rusty wool underneath, occurs in bogs from New England to Wis- 

 consin and Minnesota. Said to be poisonous. 



Leucothoe Catesbaei (Walt.) Gray. 



