594 MINNESOTA BOTANICAL STUDIES. 
Lactuca pulchella (Pursu) 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 Micux. 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. 1: 294. 1833. 
Coll.: Ballard 2627, St. Vincent; 2781, Warren; Mac- 
Millan & Skinner 76, Dugdale. 
Nabalus racemosus (Micux.) DC. Prodr. 7: 242. 1838. 
Coll. : Ballard 2559, St. Vincent; 2609, Humboldt; Mac- 
Millan & Skinner 59, Crookston; 263, St. Hilaire. 
AMBROSIACEZ. 
Iva xanthifolia (FResEN.) Nutr. Trans. Am. Phil. Soc. (II.) 7: 
R476 LO4T. 
Coll. : Ballard 2659, St. Vincent; 2716, Kennedy. 
Ambrosia trifida L. Sp. Pl. 987. 1753. 
Coll.: Ballard 2567, St. Vincent, 2704, Northcote. 
Ambrosia artemisiefolia L. Sp. Pl. 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 Miuu. Gard. Dict. Ed. 8, no. 2. 1768. 
Coll.: Ballard 2511, Fergus Falls; 2677, St. Vincents 
2764, Hallock; MacMillan & Skinner 217, Crookston. 
COMPOSITZ. 
Vernonia fasciculata Micux. Fl. Bor. Am. 2:94. 1803. 
Coll.: MacMillan & Skinner 50, Crookston. 
Eupatorium maculatum L. Ameen. Acad. 4: 288. 1755. 
Coll.: MacMillan & Skinner 121, Maple lake; 391, 
Holmes. 
