594 MINNESOTA BOTANICAL STUDIES. 



Lactucapulchella (PURSH) DC. Prodr. 7: 134. 1838. 



Coll. : Ballard 2547, St. Vincent; 2617, Humboldt ; 2712, 

 Northcote ; 2723, Kennedy; MacMillan & Skinner 31, 

 Crookston. 



Agoseris glauca (PURSH) GREENE, Pittonia, 2 : 176. 1891. 



Coll.: Ballard 2735, Kennedy; 2791, Warren; Mac- 

 Millan & Skinner 43, Crookston. 



Hieracium canadense MICHX. Fl. Bor. Am. 2: 86. 1803. 



Coll.: Ballard 2768, Hallock ; 2799, Warren; MacMillan 

 & Skinner 84, Dugdale ; 114, Maple Lake. 



Nabalus albus (L.) HOOK. Fl. Bor. Am. i : 294. 1833. 



Coll.: Ballard 2627, St. Vincent; 2781, Warren; Mac- 

 Millan & Skinner 76, Dugdale. 



Nabalus racemosus (Micnx.) DC. Prodr. 7: 242. 1838. 



Coll. : Ballard 2559, St. Vincent; 2609, Humboldt; Mac- 

 Millan & Skinner 59, Crookston; 263, St. Hilaire. 



AMBROSIACE^E. 



Iva xanthifolia(FRESEN.) NUTT. Trans. Am. Phil. Soc. (II.) 7: 



347. 1841. 

 Coll. : Ballard 2659, St. Vincent; 2716, Kennedy. 



Ambrosia trifida L. Sp. PI. 987. 1753. 



Coll. : Ballard 2567, St. Vincent, 2704, Northcote. 



Ambrosia artemisiaefolia L. Sp. PI. 987. 1753. 

 Coll. : Ballard 2513, Fergus Falls. 



Ambrosia psilostachya DC. Prodr. 5: 526. 1836. 



Coll. : Ballard ' 2538, Fergus Falls ; 2689, Northcote ; 

 2790, Warren; MacMillan & Skinner 331, Crookston. 



Xanthium canadense MILL. Gard. Diet. Ed. 8, no. 2. 1768. 

 Coll.: Ballard 2511, Fergus Falls; 2677, St. Vincent; 

 2764, Hallock; MacMillan & Skinner 217, Crookston. 



COMPOSITE. 



Vernonia fasciculata MICHX. Fl. Bor. Am. 2 : 94. 1803. 

 Coll. : MacMillan & Skinner 50, Crookston. 



Eupatorium maculatum L. Amoen. Acad. 4: 288. 1755. 



Coll.: MacMillan & Skinner 121, Maple lake; 391, 

 Holmes. 



