582 MINNESOTA BOTANICAL STUDIES. 



Oxygraphis cymbalaria (PURSH) PRANTL, in Engl. & Prantl, 



Nat. Pfl. Fam. 3: Abt. 2, 63. 1891. 



Coll.: Ballard 2508, Fergus Falls; 2645, St. Vincent; 

 2788, Warren; MacMillan & Skinner 409, Holmes. 



Thalictrum purpurascens L. Sp. PI. 546. 1753. 

 Coll. : MacMillan & Skinner 32, Crookston. 



BERBERIDACEjE. 



Caulophyllum thalictroides (L.) MICHX. Fl. Bor. Am. i : 205. 



1803. 

 Coll. : MacMillan & Skinner 286, Thief River Falls. 



MENISPERMACE^:. 



Menispermum canadense L. Sp. PI. 340. 1753. 



Coll.: Ballard 2661, St. Vincent; MacMillan & Skinner 

 194, Crookston. 



CRUCIFER^E. 



Thlaspi arvense L. Sp. PI. 646. 1753. 



Coll. : Ballard 2573, St. Vincent; 2579, Humboldt ; 2690, 

 North cote. 



Roripa palustris (L.) BESS. Enum. 27. 1821. 



Coll. : Ballard 2709, Northcote ; MacMillan and Skinner 

 214, Crookston. 



Roripa hispida (DESV.) BRITTON, Mem. Torr. Club, 5 : 169. 



1894. 

 Coll. : Ballard 2639, St. Vincent. 



Sophia hartwegiana (FOURN.) GREENE, Pittonia, 3 : 95. 1896. 

 Coll. : MacMillan & Skinner 363, Crookston. 



Erysimum cheiranthoides L. Sp. PI. 661. 1753. 



Coll. : MacMillan & Skinner 5, 197, Crookston. 



CRASSULACE.E. 



Penthorum sedoides L. Sp. PI. 432. 1753. 



Coll.: MacMillan & Skinner 231, Crookston; Ballard 

 2780, Warren. 



