258 



WEED FX,ORA OF IOWA 



Wild Comfrey {Gynoglosswm virginmnum L.)- 



Description. — ^Perennial . hirsute herb with simple stem 2-3 ft. 

 high, leafless above; stem leaves lanceolate-oblong, clasping by a 

 heart-shaped base; Bowers on long peduncles, pale blue, small; fruit 

 broad, nutlets not margined, convex on the upper surface. 



Distriiutidn.-^GoT3imon in woods of the central Mississippi val- 

 ley. New Brunswick to Ontario, Florida, Louisiana to Texas. Com- 

 mon in eastern to central Iowa near woods. 



Exterminaiion. — Sometimes persistent in newly made fields in 

 the northern states. Cultivation for a few seasons will remove the 

 weed. 



Fig. 148. Wild Comfrey {Cynoglossum virginianum) . Woodland pastures. 

 (Photographed by Colburn.) 



