CLASSIFICATION OF ANGIOSPERMS. 68i 



from New York to Texas, contains tliymol, ibymoquinone, liydro- 

 thymoquinone, carvacrol, cymene, and limoncne. 



Nepeta Cataria (catnip) is a perennial herb naturalized in 

 the United States from Europe (Fig. 373). It contains a bitter 



Fig. 374. (b) A mass of Ground Ivy {Nepeta hederacea) growing on an embankment, 

 with (a) Spring Beauty {Claylonia virginica). 



principle, tannin, and an oxygenated volatile oil. .\ cpcta hede- 

 racea or GROUND IVY is a creeping perennial herb with blue bilabi- 

 ate flowers and reniform leaves (Fig. 374). It contains a bitter 

 principle and volatile oil. Cunila origanoidcs, or American dit- 



