90 GEOLOGICAL SUKVET OF CANADA. 



657. RUPPIA, Linn. Gen. 175. (DITCH-GRASS.) 



(2451.) R. maritima, Linn. ; Pursh, Fl. I., 121 ; Hook., F\. II. 170. 

 Generally in salt ponds by the sea-coast. Abundant at Yarmouth, 

 N.S., and in salt ponds at Baddeck, Capo Breton. (Macoun.) Growing 

 under water in estuaries of rivers flowing into' the Gulf of St. Law- 

 rence, New Brunswick coast. (^Fowler, Cat.) St. Andrews, N.B. 

 ( Vroom.) Pokeseudie Gully, (Gloucester Co., N.B. (Say.) Growing 

 profusely in the northern end of Old Wives Lakes, Assiniboia, near the 

 Canadian Pacific Eailway; in salt ponds at Qualicum and Alberni, 

 Vancouver Island. (Macoun.) 



658. ZANNICHELLIA, Linn. Gen. 1034. (HORNED 

 PONDWEED) 



(2452.) Z. palustris, Linn.; Pursh, Fl. I., 4 : Hook., Fl. II., 170. 

 Freshwater, and brackish ponds and ditches; not rare. In the salt 

 marsh near Truro, and at Yarmouth, N.S. ; salt ponds at Baddeck, 

 Cape Breton. (Macoun & Burgess.) Growing under water in streams 

 rendered brackish by the tides. Eichibucto and Spurr's Cove, N.B. 

 (Fowler, Cat.) Salt Lake, Anticosti. (Macoun.) Not uncommon at 

 Ottawa. (Fletcher, Fl. Ott.) Pools bj' the St. Lawrence River, at Pres- 

 cott, Ont. (Billings.) Marshy ponds near Rednersville, Bay of Quinte, 

 and in a ditch between Taylor's Hill and ^the River Moira, Belleville, 

 Ont. (Macoun.) Lake Mi(?tassini, N.E.T. ; Moose Mountain Creek, Man. 

 (J. M. Macoun.) In "The River that Turns," near the Elbow of the 

 South Saskatchewan, and numerous brackish ponds throughout the 

 prairie region. (Macoun.) 



659. ZOSTERA, Linn. Gen. 1032. iGRASS-WRACK.) 



(2453.) Z. marina, Linn. ; Pursh, Fl. I., 2. 



Between high and low tide on both the east and west coasts. Hali- 

 fax, N.S. (Sommers, Cat.) On the sea-coast at Yarmouth, and on 

 McNab's Island, Halifax Harbor, N.S. (Macoun.) Common along 

 the coasts of Nova Scotia and Newfoundland. (McKay.\ Growing 

 under water in shallow places along the Gulf coast, N.B. (Fowler, Cat.) 

 Salt Lake, Anticosti ; common around the Bay of Chaleur and up the 



