572 MINNESOTA BOTANICAL STUDIES. 
NAIADACE#. 
Potamogeton perfoliatus L. Sp. Pl. 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. 
SCHEUCHZERIACEA. 
Triglochin maritima L. Sp. Pl. 339. 1753. 
Coll.: MacMillan & Skinner 112, Dugdale. 
ALISMACEZ. 
Alisma plantago-aquatica L. Sp. Pl. 342. 1753. 
Coll.: Ballard 2583, Humboldt; 2746, Hallock; Mac- 
Millan & Skinner 24, 417, Crookston. 
Sagittaria latifolia WILLD. Sp. Pl. 409. 1806. 
Coll.: MacMillan & Skinner 10, Crookston ; 370, Holmes. 
Sagittaria arifolia Nurr.; J. G. Smith, Ann. Rep. Mo. Bot. 
Gard. 6%:32. “1604. 
Coll.: Ballard 2580, Humboldt; 2657, St. Vincent. 
Previously reported from Minnesota by J. G. Smith in Ann. 
Rep. Mo. Bot: (Gard: 6:33. 1505. 
NYMPHAACESA. 
Nympheza advena Souanp, in Ait. Hort. Kew. 2: 226. 1789. 
Coll.: MacMillan & Skinner 396, Holmes. 
VALLISNERIACEZ. 
Philotria canadensis (Micux.) Brirron, Science (II) 2:5. 
1895. 
Coll.: MacMillan & Skinner 23, Crookston. 
GRAMINEZ. 
Andropogon scoparius Micux. Fl. Bor. Am. 1:57. 1803. 
Coll.: MacMillan & Skinner 254, Crookston. 
Andropogon furcatus Munt.: Willd. Sp. Pl. 4: 919. 1806. 
Coll.: Ballard 2598, Humboldt; 2769, Hallock; Mac- 
Millan & Skinner 357, Shirley. 
