292 



WEED FLORA OF IOWA 



Figure 167A 



Figure 167B 



Fig. 167-A. Glandular trlchome from viscid pod of Moth Mullein (Verbascum 



blattaria) . 

 (Drawing L. H. Pammel and Charlotte M. King.) 



Fig. 167-B. Distribution of Mullein. 



rotate, yellow or rarely white; stamens unequal, the 3 upper 

 shorter, woolly, with short anthers ; the 2 lower smooth with larger 

 anthers ; trichomes many-celled, branched with central axis. 



Distribution. — From Nova Scotia west across the continent. 

 Southwest to Missouri and Kansas and Utah. Common in waste 

 places, especially in eastern Iowa. 



Extermination. — Mullein is easily destroyed by cutting the plant 

 off a few inches below the surface of the ground. This may be 

 done in the autumn after the appearance of the root leaves, or in 

 the second season when the plant shoots up. 



Toadflax (Linaria vulgaris Hill.). 



Description. — Persistent, deep-rooted perennial, l%-2^ ft. high, 

 with erect, slender stem; leaves smooth, sessile, crowded, alternate- 

 linear, somewhat fleshy ; flowers in racemes, showy, pale yellow and 

 orange lips; corolla 2-lobed, closed; seeds small, dark brown to 

 black and roughened; flowers from June to October. 



Distribution. — Introduced from Europe first as a cultivated 

 plant from whence it has spread to roadsides, meadows, and waste 

 places. Somewhat widely distributed in this state, but particularly 

 common in Clayton, Allamakee and "Winneshiek counties; local in 

 Story county. 



