586 MINNESOTA BOTANICAL STUDIES. 



EUPHORBIACEJE. 



Euphorbia serpyllifolia PERS. Syn. 2 : 14. 1807. 



Coll.: Ballard 2665, St. Vincent; 2682, Northcote ; 2774, 



Warren. 

 Euphorbia glyptosperma ENGELM. Bot. Mex. Bound. Surv. 187 



1859. 

 Coll. : Ballard 2604, 2605, Hallock ; 2734, Kennedy. 



Euphorbia maculata L. Sp. PL 455. 1753. 

 Coll. : Ballard 2664, St. Vincent. 



ANACARDIACE^. 



Rhus glabra L. Sp. PI. 265. 1753. 



Coll. : MacMillan & Skinner 195, Crookston. 



ACERACE^:. 



Acer saccharum MARSH. Arb. Amer. 4. 1785. 



Coll. : MacMillan & Skinner 182, Maple lake. 



Acer negundo L. Sp. PL 1056. 1753. 



Coll. : MacMillan and Skinner 422, Crookston. 



BALSAMINACE^:. 



Impatiens biflora WALT. Fl. Car. 219. 1788. 

 Coll. : Ballard 2500, Fergus Falls. 



VITACE^E. 



Vitis vulpina L. Sp. PL 203. 1753. 



Coll. : MacMillan & Skinner 166, Maple lake. 



Tilia americana L. Sp. PL 514. 1753. 



Coll. : MacMillan & Skinner 320, Crookston. 



HYPERICACE^:. 



Triadenum virginicum (L.) RAF. FL Tell. 3 : 79. 1836. 

 Coll. : MacMillan & Skinner 165, Maple lake. 



CISTACE^E. 



Lechea stricta LEGGETT ; Britton, Bull. Torr. Club, 21 : 251. 



1894. 

 Coll. : MacMillan & Skinner no, Maple lake. 



