34 METASPERMAE OF THE MINNESOTA VALLEY. 



Living species: 50 ±; fresh and rarel}'^ brackish wa- 

 ters; cosmopolitan. Russia, 25; Europe, 38; N. America, 35 

 (15 endemic); California, 19; Canada, 27; E. Sts., 29; Rocky 

 Mts., 11; PL King., 10; PL WheeL, 4; S. Sts., 10. 



Fossil species: Tertiary; numerous forms described 

 but all rather doubtful; 2 sp. clearer than the rest. Oeningen 

 (A. Br.): S. France (Sajwrta). 



Potamogeton iiatans Linn. Spec. 126 (1753). 

 Wats, and Coult, Gray's Man. 6 ed. 558; Hritt., FL N.J. 257; Webb., 

 FL Neb 97; Upham, FL Minn. 136: Chap., FL So. St. 446: Wats., FL Calif. 

 II, 195; Mac, FL Can. II, 81; Coult., FL Colo. 362; Nym., Fl.Eur.: Led., 

 FL Ross. IV, 23; Hook., FL Gt. Brit. 431; Richt., PL Eur. 11; Herd., Fi. 

 Eur. Russ. 124: EngL, Ascherson, Nat. Pflanz. II. 1 207; Wats., King Exp 

 337: Cov. FL Ark. 228; Hart, FL Scand. T, 431; Rothr., Alask. 445. 



Europe; Asia; Australia; Africa. 



North America: Anticosti, N. S., N. Br., Q., Ont., 

 Owen Sound to Man. and Lake Athabasca; N. to Hudson Bay 

 and Alaska; Vancouver; S. to Calif., Nev., Utah, N. Mex.; E. 

 ±0 N. Eng., N. J. and Fla. 



Minn, valley: Throughout; abundant; ponds, lakes 

 and sluggish streams. 



Herb. : Ballard, 782, Swan Lake, Carver Co. ; Ballard, 

 587, Crystal Lake, Scott Co. ; Ballard, 858, Page Lake, Carver 

 Co.; Ballard 276, Jordan, Scott Co.; Ballard 321, Belle Plaine; 

 Ballard JfSl, Prior's Lake, Scott Co. ; ISheldon 723, Cottonwood 

 river, near Sleepy Eye; Ballard 900, Waconia; Taylor 1072, 

 Douglas Co.; Sheldon 273, Duck Lake, Blue Earth Co.; Sheldon 

 1088, Springfield; Kassube 223, Rocky Lake; Ilerrick 281, Min- 

 netonka; Holzinrjer 265, Winona Co.; Bailey 391, Mud Lake; 

 Sandberg 531, Chisago Co. ; Herb. Sheld. 1693, Minneapolis. 



Potamogeton fluiians Roth. FL Germ. I, 72 (1788). 

 P. nutans var. Jluitans Cham. Adnot. 4 (1815). 

 P. petiolaris Pu. Del. Pr. I, 151 (1822). 



P. nutans var. angustutus M. and K. Rillil. FL D, I, 836 (1823). 

 P. oblongus Mey. Chlor. Hann. 519 (1836). 

 ?P. lonchites Tuckerm. Am. Jour. Sci. 2, VI, 226 (1848). 

 Wats, and Coult., Gray's Man. 6 ed. 560; Britt., FL N. J. 257; Upham, 

 FL Minn. 136; Mac, FL Can. II, 83, 369; Wats., Fl. Calif. II, 196; Coult , FL 

 Colo. .363; Chap., Fl. So. St. 446; Hook., Fl. Gt. Brit., 432?; Richt., PL Eur. 12? 

 Herd., FL Eur. Russ. 124; EngL, Ascherson, Nat. Pllanz. II, 1, 207; Wats., 

 King Exp. 3.37; Hart., Fl. Scand. I, 431; Webb , App.x. Neb. 22. 

 All Europe: cosmopolitan. 



North America: N. Br., Ont. to N. J.; W. to Minn., 

 Iowa, Neb., Mex.; also Washington to Nevada. 



