46 METASPERMAE OF THE MINNESOTA VALLEY. 
Elodea canadensis Ricu. and Micux. FI. N. Am. I, 20 (1808). 
Serpicula occidentalis PursH, FI. Am. 38 (1814). 
Udora canadensis Nutr. Gen. II, 242 (1818). 
Serpicula verticillata MuUHL. Cat. (1818). 
Apalanthe schweinitzii PLANCH. Ann. Sci. Nat. 3, XI, 75 (1839). 
Anacharis canadensis PLANCH. Ann. Mag. and Nat. Hist. 2 ser. I, 
86 (1848). 
Udora occidentalis Kocu, Syn. 771 (1843-45). 
Anacharis alsinastrum Bas. Ann. Nat. Hist. 81 (1848). 
Wats. and Coult., Gray’s Man. 6 ed. 496; Britt., Fl. N. J. 229; Upham, 
Fl. Minn. 139; Wats., Fl. Calif. II, 129; Chap., Fl. So. St. 450; Mac., Fl. 
Can. II, 1; Hook., Fl. Gt. Brit. 382; Richt., Pl. Eur. 21; Herd., Fl. Eur. 
Russ. 124; Engl., Ascherson, Nat. Pflanz. II, 1, 251; Cov., Fl. Ark. 221; 
Hart., Fl. Scand. I, 403; Webb., Appx. Neb. 22. 
Introduced in Gt. Britain, C. Hur. and Russia. 
North America: Q., Ont. to Saskatchewan and Assini- 
boia; S. to Oregon and Mendocino Co., Calif.; S. to N. Eng., 
N. J. and N. Car.; W. to Minn., Neb., Ark. and Mo. 
Minn. valley: Forest district; abundant; rivers, 
streams and lakes. 
HerRsB.: Ballard 605, Prior’s Lake, Scott Co.; Ballard 
822, Page Lake, Carver Co.; Ballard 823a, Jordan, Scott Co.; 
Taylor 317, Janesville; Oestlund 189, Minnehaha; Holzinger 270, 
Winona Co.; Holzinger 271, Winona Lake. 
VALLISNERIA Linn. Gen. 741 (1737) Em. Mich. 
Physkium Lovur. Fl. Cochinch. 662 (1790). 
Nechamandra PLANCH. Ann. Sci. Nat. 3, XI, 78 (1849). 
?Lagarosiphon HAary. Hook. Journ. Bot IV, 230 (1842) part. 
Benth. and Hook., Gen. Pl. III, 450, 451; Durand, Ind. Gen. Phan. 
383; Engler and Prantl, Nat. Pflanz. 2, I, 251 (Ascherson and Giirke); 
Schenck, Palaeophyt. 390. 
Living species: 2; tropical and subtropical regions, 
extending into temperate N. and S. America. 1 sp. tropical 
Asia and Isl. of Socotra (African region); 1 sp. circumdiffused. 
Fossil species: Hocene, Aix (Saporta) 1sp.; Jurassic 
of Siberia, 1 sp.? (Schenck) 
Vallisneria spiralis Linn. Spec. 1015 (1753). 
Physkium natans Lour. Cochinch. 662 (1790). 
Valhsneria americana Micux. Fl. N. Am. II, 220 (1803). 
V. jacquiniti SAVI. Oss. 12 (1816). 
V. spiralis var. americana TORR. Comp. 365 (1824). 
V. jacquiniana Eicuw. Fl. Casp. Cauc. 2 (1831). 
Wats. and Coult., Gray’s Man. 6 ed. 496; Britt., Fl. N. J. 229; Mic., Fi. 
Can. II, 1; Chap., Fl. So. St. 450; Upham, Fl. Minn. 139; Nym., Fl. Eur.; 
Led., Fl. Ross. IV, 46; Richt., Pi. Eur. 2t; Herd. Fl. Eur. Rudy 124; 
Engl., Ascherson and Girke, Nat. Pflanz. IT, 1, 252; Cov., Fl. Ark. 221. 
