Wheeler: THE FLORA OF THE RED RIVER VALLEY. 597 



Rudbeckia hirta L. Sp. PL 907. 1753. 



Coll.: Ballard 2563, St. Vincent ; MacMillan & Skinner 

 41, Crookston. 



Rudbeckia laciniata L. Sp. PI. 906. 1753. 



Coll.: Ballard 2660, St. Vincent ; MacMillan & Skinner 

 205, Crookston. 



Ratibida columnaris (SiMs) D. DON; Sweet, Brit. Fl. Gard. 2: 



361. 1838. 



Coll.: MacMillan & Skinner 75, Maple lake, 365, 

 Holmes. 



Helianthus annuus L. Sp. PI. 904. 1753. 

 Coll. : Ballard 2675, St. Vincent. 



Helianthus scaberrimus ELL. Bot. S. C. & Ga. 2: 423. 1824. 

 Coll.: Ballard 2601, Humboldt ; 2703, Northcote ; 2739, 

 Hallock ; MacMillan & Skinner 333, Crookston; 367, 

 Holmes. 



Helianthus maximiliani SCHRAD. Ind. Sem. Hort. Goett. 1835. 

 Coll.: Ballard 2572, St. Vincent ; 2696, Northcote ; 2727, 

 Kennedy; MacMillan & Skinner 352, 353, Shirley. 



Helianthus grosse-serratus MARTENS, Sel. Sem. Hort. Loven. 



^ 1839. 



Coll.: MacMillan & Skinner 295, 429, Crookston; 378, 

 Holmes. 



Helianthus tuberosus L. Sp. PI. 905. 1753. 



Coll. : MacMillan & Skinner 203, Crookston ; 392, Holmes. 



Bidens Isevis (L.) B.S.P. Prel. Cat. N. Y. 29. 1888. 



Coll.: MacMillan & Skinner 264, St. Hilaire ; 362, 

 Crookston; 371, Holmes. 



Bidens cernua L. Sp. PI. 832. 1753. 



Coll. : MacMillan & Skinner 9, Crookston. 



Bidens frondosa L. Sp. PI. 832. 1753. 



Coll.: Ballard 2623, Humboldt; 2678, St. Vincent ; 2710, 

 Northcote; 2733, Kennedy; 2763, Hallock; MacMil- 

 lan & Skinner n, 38, 207, Crookston. 



Helenium autumnale pubescens (AiT.) BRITTON, Mem. Torr. 



Club, 5: 339. 1894. 

 Coll. : MacMillan & Skinner 146, Maple lake. 



