90 GEOLOGICAL SXJRVEY OF CANADA. 



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



(2451.) R. maritima, Linn. ; Pursh, Fl. I., 121 ; Hook., Fl. II. 110. 

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

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

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

 rence, New Brunswick coast. (Fowler, Gat.) 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, 

 Vaocouver Island. (Macoun.) 



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

 PONDWEED) 



(2452.) Z. paiustris, Linn.; Pursh, PI. 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.) Wot uncommon at 

 Ottawa. (Fletcher, Fl. Ott.) Pools by the St. Lawrence Eiver, at Pres- 

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

 and in a ditch between Taylor's Hill and jthe Eiver Moira, Belleville, 

 Ont. (Macoun.) Lake Mistassini, N.E.T. ; Moose Mountain Creek, Man. 

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

 South Saskatchewan, and numerous brackish ponds throughout the 

 prairie region. (Macoun.) 



659. ZOSTERA, Linn. Gen. 1032. (GRASS-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, Gat.) On the sea-coast at Yai'mouth, 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, Gat.) 

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



