Endogens. CII. Hydrocharidaceae. Frog's-Bit Family. 585 - Elodea, Michx. Fl. I., 20. (Water-Weed.)

(2208.) E. Canadense, Planchon. Michx. Fl. I., 20.

Udora Canadensis, Nutt. Gen. II., 242.

U. verticillala, Spreng. Hook. Fl. II., 193.

Anacharis Canadensis, Planchon. Gray, Man. Ed. V. 495. Macoun,

Cat., No. 1756. Serpicula occidentalis, Pursh. Fl. I., 33.

Very abundant in still waters of rivers, and in lakes and ponds throughout Quebec and Ontario. Although it makes a luxuriant growth in summer, it never chokes Canadian streams, as the frosts of winter destroy it. (Macoun.) Souris River, Assiniboia. (J. M. Macoun.) Canada to the Saskatchewan. (Hooker, Fl.)

590. Aplectrum, Nutt. Gen. II., 19v. (Putty-Root.)

(2215.) A. hyemale, Nutt. Hook. Fl. II., 194.

Cymbidium hyemale, Pursh, FL, II., 593.

Corallorhiza hiemalis, Nutt., Journ. Acad. Phil. III., 139.

Rather rare in rich woods. Beechwood, near Ottawa. (Lt. Col. Wm. White.) Miriwin's woods, near Prescott, Ont. (Billings.) Wm. Anderson's woods, Prince Edward Co., woods near Belleville, Hastings Co., and in Simon Terrill's woods, Brighton, Northumberland Co., Ont. (Macoun.) Rich woods, not common near London, Ont. (Burgess.) Mandannin, Lambton Co., Ont. (J. Morrison, Jr.) Between Norway House and Cumberland House, on the Saskatchewan River. (Hooker FL)

595. Arethusa, Linn. Gen. 1014. (Arethusa.)

(2230.) A. bulbosa, Linn. Hook., Fl. II., 201; Pursh, Fl. II., 590.

Peat bogs, common eastward. Newfoundland. (Cormack.) New Harbor, Newfoundland. (Rev. A. Waghorne.) Halifax and Mahone Bay, Lunenburg Co., N.S. (Sommers, Cat.) Peat bog, North West Arm, Halifax, N.S.; also in a bog at North Sydney coal mine, Cape Breton. (Macoun & Burgess.) Glenelg, GuysboroCo., N.S. (Faribault.) Richibucto, Fredericton, Norton, Chipman, and Musquash, N. B. (Fowler, Cat.) St. Stephen, N.B. (Vroom.) Very rare in Gomin's woods and swamp near Quebec. (Thomas.) Swamp at Three Rivers, Q., 1822. (Dr. Holmes.) Mer Bleue, near Ottawa. (Fletcher, Fl. Ott.) Big swamp, Murray, Northumberland, Co., Ont. (Macoun.) Mossy bogs, Westminster Ponds, London, Ont. Very rare. (Burgess.)