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, 1, 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. and K. 
in Rohl. Fl. D. J,.845 (1828). 
P. zizii RotH. Tent. Fl. Germ. I. 75 (1788). 
P. angustifolius Op. Bohm. Gerd. 23 (1823). ; 
P. proteus f. zizii CHAM. and SCHLECHT. Linn. II. 201 (1827). 
P. lucens var. minor UPHAM, FI. Minn. 1386 (1883). 
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. II, 
370; Hart., Fl. Scand. I, 433. 
Europe; Asia? 
North America: Q., Ont. to N. Eng., N. J. and Fla.; 
W. to Minn. and Kan. 
Minn. valley: N. E. district, rare; ponds and lakes. 
HERB.: Herrick 288, Minnetonka. 
Potamogeton illinoensis MoronG, Bot. Gaz. V. (1880). 
Wats. and Coult., Gray’s Man. 6 ed. 561; Upham, Fl. Minn. 1387. 
North America: W. N. Y. to Ills., Iowa and Minn. 
Minn. valley: Reported from S. edge; ponds and lakes. 
Potamogeton pusillus Linn. Spec. 127 (1758). 
P. acutifolius Pr. Fl. Cech. 87 (1819). 
P. gramineus Mer. FI. Par. II, 70 (1836). 
P. bverchtholdit Firs. in Berchth. Fl. Bohm. II, 277 (18389). 
P. mucronatus NymM. Syll. 387 (1854-55). 
Wats. and Coult., Gray’s Man. 6 ed. 563; Britt., Fl. N. J. 258; Upham, 
Fl. Minn. 137; 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; Engl. Ascherson, Nat. Pflanz. 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. 
