Weed Survey of Indiana 219 



(?); 48, wild artichoke (HeliantJuis tuberosus) ; 49, wild pepper (?); 

 50, sour beet (?); 51, wild corn (Andropogon sorghum drummondii) . 



The specific identity of the weeds listed is doubtful in some cases. 

 The common name wild mustard probably includes not only the true 

 wild mustards in the genus Brassica but also Barbarea vulgaris, which 

 has become exceedingly abundant in Indiana during recent years. In 

 some cases in which two common names are given for what is obviously 

 the same plant (such as narrow-leaf plantain and buckhorn, woodbine 

 and trumpet creeper) only one common name is used in the above com- 

 pilation. The technical names were supplied by the writer. 



The results of the survey indicate that Canada thistle is the worst 

 weed in northern Indiana, wild garlic is the worst weed in southern 

 Indiana and white top, buckhorn, wild morning glory and red sorrel 

 are the leading weeds that are prevalent in all parts of the state. 



