682 A TEXT-BOOK OF BOTANY. 



TANY, is a small perennial herb growing from New York to 

 Florida, and characterized by its pungent aromatic properties. 



Leonurus Cardiaca or MOTHERWORT is a perennial herb nat- 

 uralized in the United States and Canada from Europe. The 



FlG. 375. Flowering tops of Datura fastuosa flava, a variety of a plant growing in the 

 East Indies, the Malay Archipelago, and tropical Africa, containing much the same con- 

 stituents as Datura Stramonium. After Newcomb. 



leaves are 3-lobed; the calyx is 5-nerved and with 5 prickly 

 teeth ; the corolla varies from white to pink or purple. The plant 

 contains a volatile oil of rather an unpleasant odor ; a bitter prin- 

 ciple; two resins and several organic acids, namely, malic, citric 

 and tartaric. 



