(2456.) E. septangulare, With.; Hook., Fl. II., 181.

E. pellucidum, Michx., Fl. L, 166; Pursh, Fl. I., 92, In soft mud on the borders of lakes and poods. Newfoundland. (Br. Morrison.) Halifax and Mahone Bay, N.S. (Sommers, Cat.) Pictou Co., and Magdalen Islands, N.S. (McKay.) Caledonia, Guys-boro Co., N.S. (Faribault.) In a small lake, North Sydney, Cape Breton. (Macoun & Burgess.) Lily Lake, Dark Lake, "Welsford, and St. Stephen, N.B. (Fowler, Cat.) Tadousac Lake, Q. (A. T. Drummond.) Trembling Lake, Argenteuil Co., Q. (D'Urban.) Border of Partridge Lake, and Gull Lake, Addington Co.; Hooper's Lake, Hastings Co.; very common in the small lakes in Peterboro and Victoria Co's., Ont.; also Birch Lake, north-east of Lake Superior. (Macoun.) Abundant in a lake two miles from Sudbury, Ont, (Fletcher.) St. Joseph Island, Georgian Bay. (J. Bell.) Pancake River, Ont,, near its mouth, growing on mud in a little cove. (R. Bell.) Port Cockburn, Lake Joseph, Muskoka Co., Ont. (Burgess.) Canada to the Saskatchewan. (Hooker, Fl.)