DESCRIPTIVE MANUAL 



291 



Extermination. — Both of the jimson weeds are easily destroyed 

 by cultivation. They produce an enormous amount of seed which 

 probably retains its vitality for a considerable length of time. How 

 long, however, has not been determined. 



SCROPHULARIACEAE, MULLEIN FAMILY. 

 Snapdragon and Simpson honey plant belong to this family. 



Mullein (Verbascum thapsus L.). 



Description. — A tall, densely woolly annual or biennial herb 2-6 

 ft. high; leaves oblong, thick, covered with branched hairs, the 

 basal leaves margined, petioled ; flowers in long dense spikes ; corolla 



1 ig. 



167. Mullein (Verbascum thapsus). A hairy biennial, common road- 

 side weed ; gravel hills along Mississippi river, old fields. 

 (Photographed by Colburn.) 



