DESCRIPTIVE MANUAL 



273 



Fig. 157-A. Distribution of Germander. 



L, H. Pammel in the Weekly Register says: "Germander is a 

 troublesome weed found in many parts of northern Iowa. It pro- 

 duces root-stock very much like mint and quack grass. Each sev- 

 ered portion produces a new plant, and for this reason it is some- 

 what difficult to destroy. The only way to exterminate this weed 

 is by thorough cultivation. Plowing in the fall during the dry 

 season, then plowing again in the spring and giving thorough cul- 

 tivation during the growing season should destroy the weed with- 

 out difficulty." 



Catnip (Nepeta cataria L.). 



Description. — A perennial, erect herb, 1-3 ft. high; leaves ovate, 

 cordate, coarsely serrate, petiolate, whitish, downy underneath; 

 flowers in cymose clusters; corolla whitish, dotted with purple; 

 trichomes several-celled, rough, thick-walled. 



Distribution. — Native to Europe; widely naturalized in the 

 northern states. 



Extermination. — Give the same treatment as to motherwort. 

 Chemical Composition. — According to the University of Min- 

 nesota*, it is as follows : — 



