LIST OF HIGHER SEED-PRODUCING PLANTS. 133 
LEMNA Linn. Gen. 798 (1787). 
Telmatophace ScHLErp. Linn. XITI, 391 (1839). 
Spirodela SCHLEID. 1. c. (1839). 
Benth. and Hook., Gen. Pi. III. 1001; Durand, Ind. Gen. Phan. 451; 
Engler and Prantl, Nat. Pflanz, 2, TIT. 163, 164 (Engler); Schenck, Palaeo- 
phyt. 378. 
Living species: 7; temperate and tropical regions. 
Russia, 3; Europe, 4; N. America, 6; Canada, 8; Rocky mts., 3; 
S. Sts., 38; 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. Carn, 1142 (1772). 
Lemna vulgaris var. B. Lam. Enc. Meth. III, 464 (1789). 
Lemna minima Humps. 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. 8. St. 442; Nym., Fl. Eur.; Led., Fl. 
Ross. IV, 17; Gris., Fl. W. I.; Hook., Fl. Gt. Brit. 425; Richt., Pl. Eur. 175; 
Herd., Fl. Eur. Russ. 122; Enyl., Nat. Pflanz. II. 3, 164; Wats., King Exp. 
336; Cov., 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. Hl. II, 245 (1848). 
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. 
. Hprs.: Sheldon 118, Elysian. 
Lemna trisulea Linn. Spec. 970 (1753). 
Lenticula trisulea Scop. Fl. Carn. 1148 (1772). 
Lemna cruciata Roxs. Fl. Ind. III, 566 (1832). 
L. intermedia RUTHE, ex. Schleid. Linn. XIII, 391 (1839). 
Staurogeton trisulcus ScHUR. Hn. 636 (1866). 
Wats. and Coult., Gray’s Man. 6 ed. 552; Britt., Fl. N. J. 254; Upham, 
Fl. Minn. 134; 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. Te 
Nym., Fl. Eur.; Led., Fl. Ross. IV, 17; Richt., Pl. Eur. 175; Herd., Fl. Eur. 
Russ. 122; kngl , Nat. Pflanz. II, 3, 164; Wats., King Exp. 336; Cov., Fl. 
Ark. 228; Hart., Fl. Scand. I, 430. 
Europe; Asia; Australia; South America; Africa. 
