576 MINNESOTA BOTANICAL STUDIES. 



Carex utriculata BOOTT; Hook. Fl. Bor. Am. 2: 221. 1840. 

 Coll.: MacMillan and Skinner 139, Maple lake; 381, 

 Holmes. 



Carex retrorsa SCHWEIN. Ann. Lye. N. Y. i : 71. 1824. 

 Coll. : MacMillan & Skinner 423, Crookston. 



Carex fusca ALL. Fl. Fed. 2 : 269. 1785. 



Coll. : MacMillan & Skinner 133, Maple lake. 



Carex cristatella BRITTON, in Britton & Brown, 111. Fl. 1 : 357. 



1896. 

 Coll. : MacMillan & Skinner 249, Red Lake Falls. 



Carex sychnocephala CAREY, Am. Journ. Sci. (II.) 4 : 24. 1847. 

 Coll. : MacMillan & Skinner 307, Crookston. 



ARACE^E. 



Arisaema triphyllum (L.) TORR. Fl. N. Y. 2 : 239. 1843. 

 Coll. : MacMillan & Skinner 237, Gentilly. 



Calla palustris L. Sp. PI. 968. 1753. 



Coll. : MacMillan & Skinner 174, Maple lake. 



Acorus calamus L. Sp. PI. 324. 1753. 



Coll. : MacMillan & Skinner 282, Thief River Falls. 



LEMNACEJE. 

 Lemna trisulca L. Sp. PI. 970. 1753. 



Coll. : Ballard 2654, St - Vincent ; MacMillan & Skinner 

 410, Holmes. 



Lemna minor L. Sp. PI. 970. 1753. 

 Coll. : Ballard 2546, Fergus Falls. 



JUNCACE^E. 



Juncus balticus WILLD. Berlin Mag. 3: 298. 1809. 



Coll.: MacMillan & Skinner 136, Maple lake; 401, 

 Holmes. 



Juncus vaseyi ENGELM. Trans. St. Louis Acad. Sci. 2:450. 



1866. 

 Coll. : MacMillan & Skinner 135, Maple lake. 



Juncus dudleyi WIEGAND, Bull. Torr. Club, 27: 524. 1900. 

 Coll.: MacMillan & Skinner 137, Maple lake; 276, 

 Wylie. 



