572 MINNESOTA BOTANICAL STUDIES. 



NAIADACEvE. 



Potamogeton perfoliatus L. Sp. PI. 126. 1753. 



Coll.: Ballard 2651, St. Vincent; MacMillan & Skinner 

 173, Maple lake. 



Potamogeton pectinatus L. Sp. PL 126. 1753. 



Coll.: Ballard 2652, St. Vincent; MacMillan & Skinner 

 172, Maple lake. 



SCHEUCHZERIACE^:. . 



Triglochin maritima L. Sp. PI. 339. 1753. 



Coll. : MacMillan & Skinner 112, Dugdale. 



ALISMACE^E. 



Alisma plantago-aquatica L. Sp. PI. 342. 1753. 



Coll.: Ballard 2583, Humboldt ; 2746, Hallock ; Mac- 

 Millan & Skinner 24, 417, Crookston. 



Sagittaria latifolia WILLD. Sp. PI. 409. 1806. 



Coll. : MacMillan & Skinner 10, Crookston ; 370, Holmes. 



Sagittaria arifolia NUTT. ; J. G. Smith, Ann. Rep. Mo. Bot. 



Gard. 6: 32. 1894. 



Coll. : Ballard 2580, Humboldt; 2657, St. Vincent. 

 Previously reported from Minnesota by J. G. Smith in Ann. 

 Rep. Mo. Bot. Gard. 6: 33. 1895. 



NYMPKEACE.E. 



Nymphaea advena SOLAND, in Ait. Hort. Kew. 2 : 226. 1789. 

 Coll. : MacMillan & Skinner 396, Holmes. 



VALLISNERIACE^. 

 Philotria canadensis (Micnx.) BRITTON, Science (II) 2:5. 



1895. 



Coll. : MacMillan & Skinner 23, Crookston. 



GRAMINE^. 



Andropogon scoparius MICHX. Fl. Bor. Am. i : 57. 1803. 

 Coll. : MacMillan & Skinner 254, Crookston. 



Andropogon furcatus MUHL. : Willd. Sp. PI. 4 : 919. 1806. 

 Coll.: Ballard 2598, Humboldt; 2769, Hallock; Mac- 

 Millan & Skinner 357, Shirley. 



