CATALOGUE OF CANADIAN PLANTS. 83 



specimens were sent to Mr. W. M. Canby and Dr. Vasey, under the 

 name mentioned above, and are likeh' in their collections now. 



(2432.) P. Spirillus, Tuckerman, Amor. Journ. Sei. VI. (2,Ser.)228. 

 P. diversifoliw!, Hook., Fl. IL, 172. 

 A lovely specie-s growing in flowing water, chiefly in the Laurentian 

 districts of Ontario. In the Kennebeccasis at Norton ; Lake Utopia and 

 Salmon River, N.B. (Fowler, Cat.) Abundant in the Grand River, at 

 Ottawa. (Fletcher, FL Ott.) In flowing water at Hull, Q. ; in numoious 

 streams, North Hastings, at Partridge Lake, Grimpsthorpe and in Crow 

 River at Marmora Iron Works; Gull River, at Elliott's Falls, and in 

 Mountain Lake above Minden, Victoria Co., Ont. (Macoun.) Norway 

 House, head of Lake Winnipeg, to Canada. (Hooker, Fl.) 



(2433.) P. hybridus, Michx., Fl. I., 101. 

 P. stUtcnis, Piirsli, Fl. I., 120. 



P.jUiformiit, Pursh, Herb. ; Tucker. Amer. Journ. Sci. VI. (2, Ser.) 230. 

 St. James, and St. Slcpheiis, N.B. ( Vroom.) Although we strongly 

 suspect that the plants I'eforrod here are P. Spirillwi, there is no rea- 

 son to doubt the occurrence of the species so far north. 



(2434.) P. rufescens, Schrader ; Hook., Fl. IL, 172. 

 P fluitann, Pursh, Fl. I., 120. 

 p. nakma, \a.T.fluitans, Torrey. ; Bot. N. York II., 254. 



Apparently a rare but widely diff'used species. St. Stephen, N.B. 

 ( Vroom.) In flowing waters, Truro, N.S. ; River Ste. Anne des Monts, 

 Gasp^, Q. ; abundant in flowing water in the River Trent, at the 

 " Narrows" and in Crow River at Marmora Iron Works ; also in the 

 North River, Belmont and in Big Bushkong Lake, Victoria Co., Ont. ; 

 Current River, Lake Superior. {Macoun.) River Mistassini, near Lake 

 St. John, Q. (Michaux.) Rapids of the Niagara River, near Bath 

 Island. (Tuckerman.) Lake Mistassini, N.E.T. (J. M. Macoun.) Michi- 

 picotin River, Ont., and Nelson River. Keewatin. (R. Bell.) Abun- 

 dant in the mill stream at Nanaimo, Vancouver Island. (Macoun.) 

 Ounalashka. (Rothr. Alask.) Stagnant waters, Canada to Hudson 

 Bay. (Hooker, Fl.) 



(2435.) P. lonchiteSjSjTuckerman, Amer. Journ. Sci. VI. (2, Ser.) 

 ' 226. 



Apparently very i-are or overlooked. Tobique Lakes, N.B. (Hay.) 

 Abundant at Ottawa. A form with remai-kably long stipules. (Fletcher, 

 Fl. Ott.) In ponds, London. Ont. (Burgess.) Niagara Rapids, near 

 Bath Island, Niagara River. (Tuckerman.) 



