LIST OF HIGHER SEED-PRODUCING PLANTS. 138 



LEMNA LINN. Gen. 798 (1737). 



Telmatophace SCHLEID. Linn. XIII, 391 (1839). 

 Spiroclela SCHLEID. 1. c. (1839). 



Benth. and Hook., Gen. PL III. 1001; Durand, Ind. Gen. Phan. 451; 

 Engler and Prantl, Nat. Pflanz. 2, III. 163, 164 (Engler); Schenck, Palaeo- 

 pfiyt. 378. 



Living species: 7; temperate and tropical regions, 

 Russia, 3; Europe, 4; N. America, 6; Canada, 3; Rocky mts., 3; 

 S. Sts., 3; California, 5-6; PL King, 4; E. Sts., 6. 



Fossil species: 2; Oligocene, Spitzbergen (Heer); 

 Samland (Conwentz). . 



Lemna minor LINN. Spec. 970 (1753). 

 Lenticula minor SCOP. Fl. Cam. 1142 (1772). 

 Lemna vulgaris var. B. LAM. Enc. Meth. Ill, 464 (1789). 

 Lemna minima HUMB. Gen. I, 372 (1815). 

 L. cyclostasa ELL. ex. Schleid. Linn. XIII, 390 (1839). 

 Wats, and Coult., Gray's Man. 6 ed. 553; Britt., Fl. N. J.-254; Webb., 

 Fl. Neb. 97; Wats., Fl. Calif. II, 190;Upham, Fl. Minn. 135; Mac.,Fl. Can. 

 II. 75; Coult., Fl. Colo. 360; Chap,, Fl. S. St. 442; Nym., Fl. Eur.; Led., Fl. 

 Ross. IV, 17; Gris., Fl. W. I.; Hook., Fl. Gt. Brit. 425; Richt., PI. Eur. 175; 

 Herd., Fl. Eur. Russ. 122; EngL, Nat. Pflanz. II. 3, 164; Wats., King Exp. 

 336; Cov., Fl. Ark. 228; Hart., Fl. Scand. 1,430. 



Europe; Asia; Africa; Australia; S. America. 



North America: Throughout; continent below 58 N. 

 lat. 



Minn, valley: Forest district and probably westward; 

 ponds and pools; floating on the surface. 



HERB. : Ballard 610, Chaska; Bollard 9, Chaska. 



Lemna per pus ilia TORR. N. Y. Fl. II, 245 (1843). 

 Wats, and Coult., Gray's Man. 6 ed. 552; Britt., Fl. N. J. 254. 



North America: N. Y. and N. J. to Mich., Wis. and 

 Minn. 



Minn valley: Forest district; floating in ponds and 

 pools. 



HERB.: Sheldon 118, Elysian. 



Lemna trisulca LINN. Spec. 970 (1753). 

 Lenticula trisulca SCOP. Fl. Cam. 1143 (1772). 

 Lemna cruciata ROXB. Fl. Ind. Ill, 566 (1832). 

 L. intermedia RUTHE, ex. Schleid. Linn. XIII, 391 (1839). 

 Staurogeton trisukus SCHUR. En. 636 (1866). 



Wats, and Coult., Gray's Man. 6 ed. 552; Britt., Fl. N. J. 254; Upham, 

 Fl. Minn. 13o; Coult.. Fl. Colo. 360; Mac., Fl. Can. II, 74; Webb., Fl. Neb. 

 97; Wats., Fl. Calif. II, 189; Hook., Fl. Gt. Brit. 425; Gris., Fl. W. L; 

 Nym., Fl. Eur.; Led., Fl. Ross. IV, 17; Richt., PI. Eur. 175; Herd., Fl. Eur. 

 Russ. 122; Hmgl , Nat. Pflanz. II, 3, 164; Wats., King Exp. 336; Cov., FL 

 Ark. 228; Hart., Fl. Scand. I, 430. 



Europe; Asia; Australia; South America; Africa. 



