36 METASPERMAE OF THE MINNESOTA VALLEY. 



446; Wats., Fl. Calif. II, 196: Hook., Fl. Gt. Brit., 432: Richt., PL Eur. 13; 

 Herd., Fl. Eur. Russ. 124; Engl., Ascherson, Nat. Pflanz. II, ], 207: Mac, 

 Fl. Can. II, 270; Roth., Wheel., Exp. 268: Hart., FL Scand. I, 432. 



Europe; N. Asia. 



North America: Q., Saskatchewan and Rocky Mts. to 

 Vancouver; S. to Yellowstone and Mono Pass, Calif.; E. to N. 

 Eng., N. J. and N. Car. 



Minn, valley: Forest district and probably W. ; ponds 

 and lakes. 



Herb.: Ballard 899, Waconia; Ballard 860, Page Lake, 

 Carver Co. ; Ballard 859, Page Lake, Carver Co. ; Bailey in herb. 

 Morong, Vermilion Lake. 



Potamogeton gramineus Linn. var. zizii (Roth.) M. andK. 

 in R5hl. Fl. D. I, 845 (1823). 



P. zizii Roth. Tent. FL Germ. I. 75 (1788). 

 P. angitstifolius Op. Bohm. Gerd. 23 (1823). 

 P. proteus f. zizii Cham, and Schlecht. Linn. II. 201 (1827). 

 P. lucens var. minor Upham, Fl. Minn. 136 (lSb'6). 

 Wats, and Coult., Gray's Man. 6 ed. 561; Britt.. Fl. N. J. 258: Mac, Fl. 

 Can. II, 85: Hook., FL Gt. Brit. 433; Richt., PL Eur. 14; Mac, Fl. Can. 11, 

 370; Hart., Fl. Scand. I, 433. 

 Europe; Asia? 



North America: Q., Ont. to N. Eng., N. J. andFla. ; 

 W. to Minn, and Kan. • 



Minn, valley: N. E. district, rare; ponds and lakes. 

 Herb.: Herrick 283, Minne tonka. 



Potamogeton illinoensis Morong. Bot. Gaz. V. (1880). 

 Wats, and Coult., Gray's Man. 6 ed. 561; Upham, Fl. Minn. 137. 

 North America: W. N. Y. to Ills., Iowa and Minn. 

 Minn, valley: Reported from S. edge; ponds and lakes. 



Potamogeton pusillus Linn. Spec. 127 (1753). 



p. acutifolius Pr. Fl. Cech. 37 (1819). 

 P. gramineus Mer. Fl. Par. II, 70 (1836). 

 P. berchthohlii Fieb. in Berchth. Fl. Bohni. II, 277 (1839). 

 P. mucronatus Nym. Syll. 387 (1854-55). 

 Wats, and Coult., Gray's Man. 6 ed. 563: Britt., FL N. J. 258; Upham, 

 Fl. Minn. 1.S7; Mac, Fl. Can. II. 87: Wats., Fl. Calif. II. 198; Coult., FL 

 Colo. 363: Hook., Fl. Gt. Brit.' 435; Led., Fl. Ross. IV. 29: Richt., PL Eur. 

 30; Herd., Fl. Eur. Russ. 124: EnpL Ascherson, Nat. Pllanz. II. 1, 208; 

 Wats., King Exp. 338; Hart., Fl. Scand. I, 435. 



N. Europe; N. Africa; N. and S. America; N. Asia. 

 North America: N. S.. N. Br.. Q., Ont. to Man., Sas- 

 katchewan. Prairie region to Brit. Col., lat. 55° N. ; S. to N. 

 Eng., N. J., Minn., Mo., Uintah Mts., Santa Cruz and the 

 Tuolumne. 



