38 METASPEKMAE OF THE MINNESOTA VALLEY. 



P. acuminatus SCHUM. Enum. Sail. 1,49 (1801). 

 P. volhynicus BESS., R. and S. Syst. Ill, 509 (1818). 

 P. cornutus PR. Fl. Cech. 37 (1819). 

 P. caudatus SEID. Op. Bohm. Gew. 23 (1823). 

 P. proteus f. lucens CHAM, and SCHLECHT. Linn. II, 197 (1827). 

 Wats, and Coult., Gray's Man. 6 ed. 562; Upham, Fl. Minn. 136; Mac., 

 Fl. Can. II. 85: Chap., Fl. So. St. 446?; Wats., Fl. Calif. II. 196; Coult., Fl. 

 Colo. 363; Hook., Fl. Gt. Brit. 432; Nym., Fl. Eur.: Led., Fl. Ross. IV. 26; 

 Richt., PI. Eur. 14; Herd., Fl. Eur. Russ. 124; Hart., Fl. Scand. I 433. 

 Europe; Asia; N. Africa; Australia; W. Indies. 

 North America: N. S., Q., Ont. to Keewatin; S. to 

 Minn., Ark., N. Mex. ; E. to N. Eng. and Fla?. ; also California. 

 Minn, valley: Throughout; infrequent; ponds and lakes. 

 HERB.: Taylor 1002, Glenwood; Oesilund 184, Minne- 

 haha; Her rick 282, Minnetonka; Bollard 600, Prior's Lake, 

 Scott Co. 



Potamogeton praelongus WULF. Roem. Arch. Ill, 331 

 (1803-5). 



P. lucens WEBB. Prim. Hoist. 15 (1780) not Linn. 

 P. flexicaule DETH. Strel. Anz. n 50 (1809). 

 P. Jkxuosus (SCHL. and) WRED. Meckl. Fl. I (1811). 

 P. acuminatus WAHL. Fl. Ups. 116 (1820). 



Wats, and Goult., Gray's Man. 6 ed. 562; Britt., Fl. N. J. 258; Richt., 

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

 Wats., Fl. Calif. II. 197. 

 Europe. 



North America: N. S. to Vancouver; S. to Mass., 

 Minn., Iowa. 



Minn, valley: Forest district; ponds and lakes or 

 sluggish streams. 



HERB.: Sheldon 319, Madison Lake; Bailey 404, Burnt- 

 side Lake. 



Potamogeton lanceolatus SM. Engl. Bot. 1985 (1808). 



P. perfoliatus var. lanceolatus ROBBINS, Gray's Man. 5 ed. (1868). 

 P. perfoliatus var. richardsonii BENNETT, Mac. Fl. Can. II, 370 

 (1890) in part? 



Wats, and Coult., Gray's Man. 6 ed. 562; Coult., Fl.Colo. 363; Wats., 

 Fl. Calif. II. 197; Mac., Fl. Can. II. 86; Upham, Fl. Minn. 137; Hook., Fl. 

 Gt. Brit. 434; Richt., PL Eur. 13; Roth., Wheel. Exp. 268?. 

 Europe. 



North America: Ont. to Rockies and 62 N. lat. ; S. to 

 N. J. , Fla. and N. Mex. ; W. to Pac. coast and Yellowstone 

 basin. 



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

 and streams. 



HERB. : Holzinger 266, Winona Co. ; Bailey 149, Ver- 

 milion Lake, and Sandberg, Hennepin Co., in herb. Morong. 



