CATALOGUE OP CANADIAN PLANTS. 75 



all still waters throughout central Ontario. {Macoun.) Common in 

 marshes at Hamilton, Ont. (Buchan.) Marshes at Kingston, Ont. 

 {Millman.) Small lakes, Eed Eiver prairie and Jjake of the Woods, 

 49th parallel. (Dawson.) Ponds, Souris Plains, Assiniboia. (J. M. 

 Macoun.) In ponds throughout the prairie region, on the Cypress 

 Hills and north to Peace Eiver and Little Slave Lake ; common in 

 ponds and quiet rivers at Cedar Hill, Nanaimo, and Alberni, Vancouver 

 Island. (Macoun.) Canada to lat. 58". {Sooker, Fl.) 



(2413.) L. minor, Linn. ; Hook., Fl. II., 169.; Pursh, PI. I., 22. 



Frequent in ponds from the Atlantic to the Pacific. Magdalen 

 Islands, N.S. (McKay.) In ponds at Truro, and in ditches at Pictou, 

 IST.S. (Macoun.) Petitcodiac, N.B. (Fowler, Cat.) Vicinity of Ottawa. 

 (Fletcher, FL Ott.) Conway's Creek and other places near Prescott, 

 Ont. ; common. (Billings.) Very common in ditches and shallow 

 pools throughout central Ontario. (Macoun.) Marshes near Hamilton, 

 Ont. (Buchan.) Common in the Lake of the "Woods and in small 

 ponds on the Eed Eiver prairie. (Dawson.) Abundant in pools 

 throughout, the whole prairie region, extending northward to the 

 Athabasca and Peace rivers, and westward to Quesnel, on the Fraser 

 Eiver, and throughout Vancouver Island. (Macoun.) Canada to lat. 

 58°. (Hooker, Fl.) 



(2414.) L. polyrrhiza, Linn. ; Hook., PI. IL, 169 ; Pursh, Fl. I., 22. 

 Spirodela polyrrhiza, Schleid. ; Coult. Rooky Mount. Flora, 360. 



Scarcely so common as the other, but just as widely distributed. In 

 still water near Louisburg, Cape Breton. (Macoun.) Sussex, N.B. 

 (Fowler, Cat.) Common around Montreal, 1821. (Dr. Holmes.) Com- 

 mon in still water around Ottawa. (Fletcher, Fl. Ott.) Conway's 

 Creek and other localities near Prescott, Ont. (Billings.) In ponds, 

 Gananoque, Ont. (Prof. Fowler.) Marshes and ponds everywhere 

 throughout central Ontario, especially in the still waters of the Eiver 

 Trent, and Eice Lake. (Macoun.) Marshes at Hamilton, Ont. {Buchan.) 

 Pelee Point, Lake Erie. (Burgess.) Stagnant pools near London, 

 Ont. (Burgess, Millman.) Occasionally in pools and still waters west 

 of Porcupine Mountain, Man., and westward to Little Slave Lake; 

 rather rare on Vancouver Island, but not uncommon at Alberni, on 

 the west coast. (Macoun.) Cumberland House, on the Saskatchewan.. 

 (Hooker, Fl.) 



