CATALOGUE OF CANADIAN PLANTS. 83 



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

 name mentioned above, and are likely in their collections now. 



(2432.) P. Spirillus, Tuckerman, Amer. Journ. Sci.YI. (2,Ser.) 228. 



P. diversifolius, Hook., Fi. II., 172. 



A lovely species growing in flowing water, chiefly in the Laurentian 

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

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

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

 streams, North Hastings, at Partridge Lake, GJ-rimpsthorpe and in Crow 

 Eiver at Marmora Iron Works ; Gull Eiver, 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. setaceus, Pursh, Fl. I., 120. 



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



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

 suspect that the plants referred here are P. Spirillus, there is no rea- 

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



(2434.) P. rufescens, Schroder ; Hook., Fl. II., 172. 



P.fluitans, Pursh, Fl. I., 120. 



P. natans, \ar.fluitans, Torrey. ; Bot. N. York II., 254. 



Apparently a rare but widely diffused species. St. Stephen, N.B. 

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

 Gaspe", Q. ; abundant in flowing water in the Eiver Trent, at the 

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

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

 Current Eiver, Lake Superior. (Macoun.') Eiver Mistassini, near Lake 

 St. John, Q. (Michaux.) Eapids of the Niagara Eiver, near Bath 

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

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

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

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

 Bay. (Hooker, Fl.) 



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



226. 



Apparently very rare or overlooked. Tobique Lakes, N.B. (Hay.) 

 Abundant at Ottawa.*A form with remarkably long stipules. (Fletcher, 

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

 Bath Island, Niagara Eiver. (Tuckerman.) 



