46 METASPERMAE OF THE MINNESOTA VALLEY. 



Elodea canadensis Rich, and Michx. F1. N. Am. I, 20 (1803). 



Serpicula occidentalis Pursh, Fl. Am. 38 (1814). 

 Uclora canadensis Nutt. Gen. II, 242 (1818). 

 Seriricula verticillata Muhl. Cat. (1818). 



Apalanihe schweinitzii Planch. Ann. Sci. Nat. 3, XI, 75 (1839). 

 Anacharis canadensis Planch. Ann. Mag. and Nat. Hist. 2 ser. I, 

 86 (1848). 



Udora occidentalis Koch, Syn. 771 (1843-45). 

 Anacliaris ahinastrum Bab, 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. Eur. 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. 



Herb. : 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. 



YALLISNERIA Linn. Gen. 741 (1737) Em. Mich. 

 Physkium Lour. FL Cochinch. 662 (1790). 

 Necliamaiidra Planch. Ann. Sci. Nat. Z, XI, 78 (1849). 

 ?Lagarosiphoii Harv. Hook. Journ. Bot IV, 230 (1842) part. 

 Benth. and Hook., Gen. PI. Ill, 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: Eocene, Aix {Saporta) Isp. ; Jurassic 



of Siberia, 1 sp. ? {Schenck) 



Yallisneria spiralis Linn. Spec. 1015 (1753). 



Physkium mdanti LouR. Cochinch. 662 (1790). 



Valhsneria americana Micux. F\. N. Am. II, 220 (1803). 



V. jacquinii Savi. Oss. 12 (1816j. 



V. spiralis var. americana Torr. Com p. 365 (1824). 



V. jacquiniana Eicnw. Fl. Casp. Cauc. 2 (1831). 

 Wats and Coult., Gray's Man. 6 ed. 496; Britt., Fl. N. J. 229; Mac, Fl. 

 Can. II, 1; Chap.. Fl. So. St. 450; Upham, Fl. Minn. 139; Nym., Fl. Eur.; 

 Led., Fl. Ross. IV, 46; Richt., PI. Eur. 21; Herd., Fl. Eur. Russ. 124; 

 Engl., Ascherson and GUrke, Nat. Pflanz. II, 1, 252: Cov., Fl. Ark. 221. 



