584 MINNESOTA BOTANICAL STUDIES. 
Chamerhodos erecta (L.) Bunce, in Ledeb. Fl. Alt. 1: 430. 
1829. 
Coll.: MacMillan & Skinner 375, Holmes. 
Not previously reported from Minnesota. 
Geum virginianum L. Sp. Pl. 500. 1753. 
Coll.: MacMillan & Skinner 213, Crookston; 250, Red 
Lake Falls; 369, Holmes; Ballard 2557, St. Vincent. 
Agrimonia hirsuta (Munu.) BickneLy, 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. 
POMACE. 
Crategus coccinea L. Sp. Pl. 476. 1753. 
Coll.: Ballard, 2562, St. Vincent. 
The determination of this is doubtful. It is the common form 
in northwestern Minnesota and Manitoba. 
DRUPACEZ. 
Prunus americana Marsu, Arb. Am. 111. 1785. 
Coll.: MacMillan & Skinner 192, 315, Crookston. 
Prunus serotina Euru. Beitr. 3:20. 1788. 
Coll.: MacMillan & Skinner 168, Maple lake. 
PAPILIONACEZ. 
Lotus americanus (NuTT.) Biscu. Litt. Ber. Linnea, 14: 132. 
1840. 
Coll.: Ballard 2771%, Hallock. 
Psoralea argophylla Pursu, Fl. Am. Sept. 475. 1814. 
Coll.: Ballard 2608, Humboldt; MacMillan & Skinner 
49, Crookston. 
Amorpha fruticosa L. Sp. Pl. 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. 
