584 MINNESOTA BOTANICAL STUDIES. 



Chamaerhodos erecta (L.) BUNGE, in Ledeb. Fl. Alt. i : 430. 



1829. 



Coll. : MacMillan & Skinner 375, Holmes. 

 Not previously reported from Minnesota. 



Geum virginianum L. Sp. PI. 500. 1753. 



Coll.: MacMillan & Skinner 213, Crookston ; 250, Red 

 Lake Falls; 369, Holmes; Ballard 2557, St. Vincent. 



Agrimonia hirsuta (MUHL.) BICKNELL, Bull. Torr. Club, 



23:509. 1896. 

 Coll. : MacMillan & Skinner 354, Shirley. 



Rosa arkansana PORTER, Syn. Fl. Col. 38. 1874. 



Coll.: Ballard 2681, Northcote ; MacMillan & Skinner 

 328, Crookston. 



POMACES. 



Crateegus coccinea L. Sp. PI. 476. 1753. 



Coll. : Ballard 2562, St. Vincent. 



The determination of this is doubtful. It is the common form 

 in northwestern Minnesota and Manitoba. 



DRUPACE^:. 



Primus americana MARSH, Arb. Am. in. 1785. 



Coll. : MacMillan & Skinner 192, 315, Crookston. 



Prunus serotina EHRH. Beitr. 3 : 20. 1788. 



Coll. : MacMillan & Skinner 168, Maple lake. 



PAPILIONACE^. 



Lotus americanus (NUTT.) BISCH. Litt. Ber. Linnasa, 14: 132. 



1840. 

 Coll.: Ballard 2771^, Hallock. 



Psoralea argophylla PURSH, Fl. Am. Sept. 475. 1814. 



Coll.: Ballard 2608, Humboldt; MacMillan & Skinner 

 49, Crookston. 



Amorpha fruticosa L. Sp. PI. 713. 1753. 



Coll. : Ballard 2505, Fergus Falls ; MacMillan & Skinner 

 160, Maple lake. 



Amorpha nana NUTT. Fras. Cat. 1813. 



Coll. : Ballard 2800, Warren ; MacMillan & Skinner 356, 

 Shirley. 



