CATALOGUE OF CANADIAN PLANTS. 167 



Eiver near Prescott. (Billings.) Common in western Ontario. (Bur- 

 gess & Buchan.) North to Bear Lake. (Richardson.) North-east from 

 Mackenzie Eiver. (Hook. Arct. PL) 



(777.) M. verticillatum, Linn. 



In marshes south side of the Bay of Quinte at Belleville, still water 

 and in the "drowned" lands along the Trent, between Hastings and 

 Heely'e Falls, Ont. ; marshes around the base of the Porcupine Moun- 

 tains, Man., Lat. 52. (Macoun.) Marshes, Burlington Bay, Hamilton, 

 Ont. (Logie.) 



(778.) M. heterophyllum, Michx. 



Lakes and rivers, apparently rare. Eiver Trent, near Heely's Falls, 

 Northumberland Co., Ont. North Eiver above Eound Lake, Peterboro 

 Co., Ont. At the mouth of the Sydenham Eiver, Owen Sound, abun- 

 dant ; also in a marsh on the lake shore at Port Stanley, Ont. (Ma- 

 coun.) Niagara Falls. (Maclagan.) Vicinity of Hamilton, Ont. 

 (Logie.) Parry Sound, Georgian Bay. (Burgess.) 



(779.) M. tenellum, Bigel. 



In watery places, Newfoundland. (De Candolle.) Eare at Eichi- 

 bucto, N.B. (Fowler's Cat.) Saguenay Eiver, Q. (A. T. Drummond.) 

 Abundant at the mouth of Buck's Eiver, Stanhope, Victoria Co., Ont. 

 (Macoun.) Lake Joseph, Muskoka, Ont. (Burgess.) 



193. PROSERPINACA, Linn. (MERMAID WEED.) 



(780.) P. palustris, Linn. 



Wet swamps, rather rare. Vicinity of Montreal. (Maclagan.) 

 Banks of the Nation Eiver, eastern Ontario. (Billings.) Marshes along 

 Lakes Isaac and Sky, Bruce Peninsula, also Fishing Islands, Lake 

 Huron. (Macoun.) 



194. HIPPURIS, Linn. (MARE'S TAIL.) 



(781.) H. vulgaris, Linn. 



Pools of water and margins of lakes from Newfoundland, Labrador 

 and Nova Scotia to the Pacific and north to Alaska and the Arctic Sea. 

 This species is widely distributed, and may on the coasts, both east and 

 west, pass into the next. 



(782.) H. maritima, Hellenius. 

 Mouth of Haye's Eiver, near York Factory, Lat. 57. (Richardson.) 



