LIST OF HIGHER SEED-PRODUCING PLANTS. 133. 



LEMNA Linn. Gen. 798 (1737). 



Telmatopliace Schleid. Linn. XIII, 391 (1839). 

 Spiroclela Schleid. 1. c. (1839). 

 Benth. and Hook., Gen. Pi. III. 1001; Durand, lucZ. Gen. P/ian. 451 ; 

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

 phyt. 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 {Heei'); 

 Samland {Conweniz). 



Lemiia minor Linn. Spec. 970 (1753). ' 



Lentkula minor Scop. F1. Carn. 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. 6ed. 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. Pllanz. II. 3, 164; Wats., King Exp. 

 336; Gov., Fl. Ark. 228; Hart., Fl. Scand. I, 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; Ballard 9, Chaska. 



Lemna perpusilla 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 trisuica Linn. Spec. 970 (1753). 

 Lenticula trisuica Scop. Fl. Carn. 1143 (1772). 

 Lemna cruciata Roxb. Fl. Ind. Ill, 566 (18.32). 

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

 Staurogeton trisulcus ScnUR. En. 636 (1866). 

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

 Fl. Minn. 135; 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. I.; 

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

 Russ. 122; Engl , Nat. Pflanz. II, 3, 164; Wats., King Exp. 336; Gov., FL 

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



Europe; Asia; Australia; South America; Africa. 



