The tall form mentioned by Dr. Gray (Manual 542) as occurring on the islands above Niagara Falls, has been gathered at Point aux Pins, Lake Erie, by Dr. Burgess.

Var. megacephalus, Torr., Bot. N. York II., 326. J. megacephalus, Wood, Bot., 724. Low rich soil or lake margins. Toronto Island, Lake Ontario. (Burgess. Macoun.) Burlington Marsh, near Hamilton, Ont. (Buchan.) Abundant in many places in low wet situations throughout Manitoba, extending west to the File Hills and Elbow of the South Saskatchewan. (Macoun.) Point aux Pins, Lake Erie. (Burgess.)

(2384.) J. Canadensis, J. Gay, var.α , coarctatus, Engelm., Mon. Junc, 473.

J. Canadensis, , J. Gay, La Harpe Mon., 134. J. accuminatus, Torr. Bot., N. York, II., 327. J. aeutiflorus, (3, minor, Hook., Fl. II., 190. (?) Low grounds, especially along lake margins; not uncommon. Bedford and Pictou, N.S. (Sommers, Cat.) River bottom, Whycocomagh, and North Sydney, Cape Breton; border of a lakelet, Canso, N.S. (Macoun.) Rather common in Kent Co.; Bocabec and Chipman, N.B. (Fowler, Cat.) Campbellton, N.B. (Chalmers.) Vicinity of Ottawa. (Fletcher, Fl. Ott.) Borders of various lakes in Hastings, Addington, and Victoria Co's., Ont. (Macoun.) Low sandy places, Port Cock-burn, Muskoka Co.; also in ditches at Leamington, Ont. (Burgess.) Point Edward, Lake St. Clair, Ont.; Lake Mistassini, N.E.T. (J. M. Macoun.) Vicinity of Hamilton, Ont. (Buchan.)

Var. δ. longecaudatus, Engelm., Mon. Junc, 4.74.

J. paradoxus, Gray, Man. Ed. II, 483.

J. polycephalus, , paradoxus, Torr. Bot., N. York, II., 327.

Easily separated from the preceding variety, as it is much taller and has many flowered heads. Common in Kent Co., N.B. (Fowler, Cat.) Gull River, Victoria Co., Ont., and Point Edward, Lake Huron. (Macoun.) Mossy bog, London, Ont. (Burgess. Millman.) Sault Ste. Marie. (Burgess.)

(2385.) J. Mertensianus, Bong. Veg. Sitcha, (1833.)

J. ensifolius, var. minor, Hook., Fl. II., 191, in part.

Wet places along mountain brooks. Camp Akamina, Rocky Mountains, 6,000 feet alt, South Kootanie Pass, 49th parallel. (Dawson.) On the summit of Copper and Castle mountains, Rocky Mountains. (Macoun.) Alpine swamps of the Rocky Mountains, north of the Smoky River; Sitka to Ounalashka. (Hooker, Fl.)

Var. , paniculatus, Engelm., Mon. Junc, 479.

Collected in the Rocky Mountains along the Bow River, by Bour-geau. (Engelmann.)

(2386.) J. Xiphoides, E.Meyer, Var. γ. montanus, Engelm.,

Mon. Junc, 481.

J. ensifolius, var. major, Hook., Fl. II., 191.

Not uncommon in the Rocky Mountains. South Fork of Belly River, 49th parallel; Flathead River, B.C. (Dawson.) In brooks in the Cypress Hills, and westward along the Bow River throughout the Rocky Mountains, and northward along the North Saskatchewan, at Fort Pitt and Edmonton; also along Beaver Creek, in the Selkirk Mountains. (Macoun.)

Var.α. littoralis, Engelm., Mon. Junc, 481.

Abundant along the Somas River, at Alberni, and in marshes covered by high tide at the mouth of that river, on the west coast of Vancouver Island, 1887. (Macoun.)

Var. δ. macranthus, Engelm., Mon. Junc, 482.

J - polycephalus, var. crassifolius, Hook., Fl. II., 190, in part.

Ounalashka, North West coast, and Cascade Mountains. (Engelmann.) Common in ditches and by the margins of brooks, rivers and lakes, near Victoria, Nanaimo, Qualicum and Alberni, Vancouver Island. (Macoun.) Nimpkish Lake, Vancouver Island. (Dawson.) Fort Wran-gel, Alaska. (Meehan.) North West coast; frequent. (Hooker, Fl.)

Var.ε. triandrus, Engelm. Mon. Junc, 482.

J. ensifolius, var. minor, Hook., Fl. II., 190, in part.

From Ounalashka to the Cascade Mountains. (Engelmann.) Abundant on the margins of lakes and by streams, on Vancouver Island, Langford Lake, Horne Lake, and Barclay Sound. (Macoun.) Sitka to Ounalashka. (Hooker, Fl.)

(2387.) J. Nevadensis, Watson, Proced. Am. Acad. XIV., 303.

J. phaeocephalus, var. gracilis, Engelm., Mon. Junc, 484.

Ladner's Landing, and New Westminister, along the Fraser River, B.C., 1883. (Fletcher.) Abundant in marshes at the head of Barclay Sound, and along Chinaman Creek and Somas River that flow into it, on the west coast of Vancouver Island. (Macoun.)

(2388.) J. supiniformis, Engelm., Mon. June, 461.

Stems generally floating in water and often rooting at the nodes. Where the water recedes the plants grow upright and the heads are larger. Small ponds at the mouth of the Somas River, and along Sproat Lake, six miles from Alberni, west side of Vancouver Island, 1887. (Macoun.)