(2476.) S. caespitosus, Linn.; Torr. Cyp., 319. Eleocharis caespitosa, Link.; Hook., Fl. II., 229.

Chiefly boreal and alpine in habit, but extending across the continent. Peat bog, Sydney Mine, Cape Breton. (Macoun & Burgess.) Richibucto and Lily Lake, N.B. (Fowler, Gat.) Peat bog, Salt Lake, Anticosti, (Macoun.) Summit of Mount Albert, Gaspé, Q. (Macoun. Porter.) Harbor Island, Mingan, Q. (St. Cyr.) Marsh at Chicken Bay, Lake Huron; abundant at Current River and north-east coast of Lake Superior; east coast of Lake Nipigon, Ont. (Macoun.) North shore of Lake Superior. (Agassiz.) York Factory, Hudson Bay; Ford's Harbor, coast of Labrador. (JR. Bell.) Bogs along the base of the Porcupine Mountain, Man.; on boggy soil, from Morley westward through the Rocky and Selkirk Mountains; on the summit of Mount Arrowsmith, alt. 4,800 feet, Vancouver Island. (Macoun.) Throughout Canada to near the shores of the Arctic sea, and in swamps of the Rocky Mountains. (Hooker, Fl.) Ounalashka, and Sitka. (Rothr. Alask.) Greenland. (Lange.)

(2477.) S. subterminalis, Torr.; Hook., Fl. II., 229.

Floating and growing in mud at the bottom of shallow lakes. Petit-codiac, and Quaco, N.B. (Fowler, Cat.) St. Clair Flats, St. Clair River, Ont. (J. M. Macoun.) In water, Blackstone Lake, Muskoka Co., Ont. (Burgess.) Oba Lake, Ont. (B. Bell.) Gull Lake, Addington Co., and in Gull River, Victoria Co.; White River, north of Lake Superior; and in a small lake on Mount Mark, Vancouver Island, alt. 2,500 feet. (Macoun.) Deep standing pools in the Rocky Mountains, near the head waters of the Columbia. (Hooker, Fl.)

(2478.) 8. pungens, Vahl.; Gray, Man. Ed. V., 561.

S. triqueter, Michx., Fl. L, 47.

S. Americanus, Pers.; Pursh, Fl. I., 56.

S. mucronatus, Vahl.; Pursh, Fl. I., 55.

Not uncommon in salt marshes, and on the shores of the Great Lakes; extending from the Atlantic to the Pacific. Newfoundland. (Reeks.) Marshes at Sydney Mines, and Baddeck, Cape Breton. (Macoun.) Pictou, N.S. (McKay.) Common in salt or brackish marshes, New Brunswick. (Fowler, Cat.) Ouatechechou, Q. (St. Cyr.) Gravelly island in the St. Lawrence, opposite Montreal. ( W. F. McCrea.) Along the Rideau River, at Ottawa. (Fletcher, Fl. Ott.) Bank of the St. Lawrence, three miles west of Prescott; banks of the Rideau River, near Ottawa. (Billings.) Hog Lake, North Hastings, Ont.; sands of Presqu'ile Point, Lake Ontario; River Trent, above .Heely Falls, Northumberland Co., and on Britton's Island, Gull Lake, Victoria Co., Ont.; marsh at Chicken Bay, Lake Huron. (Macoun.) Sands of Toronto Island, Lake Ontario. (Millman.) Vicinity of Hamilton, Ont. (Logic.) Shallow water, Parry Sound, Georgian Bay. (Burgess.) Salt marshes at Brandon, and Calgary, N.W.T. (Prof. Fowler.) Borders of salt marshes, Old Wives Lakes, Cypress Hills, and throughout the prairie region generally; common in sandy marshes at Oak Bay, and along the coast of Vancouver Island to Comox; also in marshes at Alberni, on the west coast. (Macoun.) Fort Wrangel, Alaska. (Meehan.) Missinaibi River; marshes of the Saskatchewan and throughout the country to the Arctic regions. (Hooker, Fl.)

(2479.) S. Nevadensis, Watson, Bot. King's Exp. V., 360.

In alkaline marshes along the north end of Old Wives Lakes, and along some of the salt lakes north of the Cypress Hills. (Macoun.) Chinaman's Ranche, above Spence's Bridge, B.C. (Fletcher.)

(2480.) S. lacustris, Linn.; Hook., Fl. II., 229 (Great Club-Eush.)

S. validus, Vahl.; Pursh, Fl. L, 56; Gray, Man. Ed. V., 562; Macoun, Cat. No. 1927.

Common in still water of rivers, and in lakes and marshes from the Atlantic to the Pacific. Newfoundland. (Reeks.) Moser's Lake and Cow Bay, Halifax Co., N.S. (Sommers, Cat.) Annapolis, and Yarmouth N.S. (Macoun.) In still fresh water N.B.; common. (Fowler, Cat.) Campbell-ton, N.B. (Chalmers.) In marshes at Salt Lake, and Ellis Bay, Anticosti. (Macoun.) Vicinity of Ottawa; not common. (Fletcher, Fl. Ott.) Kemptville, Ont. (Porter.) Common around Prescott, Ont. (Billings,) St. Andrews, Q., and Port Colborne, Lake Erie. (McQill Coll. Herb.) Rivers, lakes and ponds, quite common in central and western Ontario.

(Macoun.) Vicinity of Hamilton. (Logie.) In water at London, Ont. (Burgess. Millman.) North shore of Lake Superior. (Agassiz.) Lake Nipigon; and Kaministiqua River, Thunder Bay, Lake Superior. (Macoun.) Lake of the Woods, and Roseau River, Man. (Burgess.) Lake Mistassini, N.E.T.; "Grassy Narrows," Lake Winnipeg; Beren's River and down the Severn River, Keewatin. (J. M. Macoun.) Michi-picotin River, Ont.; Nelson River, Keewatin. (R. Bell.) Moose Factory, James Bay. (Cottar & Dr. Hayden.) Winnipeg and North-west Angle Road; also Trader's Road, Man. (Dawson.) Occasionally in ponds, but particularly at Rush Lake, in the prairie region, extending north to the Peace River; Bow River, at the Kananaskis, Rocky Mountains, and in the Columbia Valley, between Golden City and Donald; not uncommon on the borders of lakes, Vancouver Island. (Macoun.) British America, as far north as lat. 57°; marshes of the Rocky Mountains. (Hooker, Fl.)

Var. occidental is, Watson, Bot. Calif. II., 218. Kootanie Valley, Rocky Mountains, 1883. (Dawson.)

(2481.) S. maritimus, Linn.; Hook., Fl. II., 230, (Sea Club-Rush.)

S. maritimus, ß. macrostachyos, Michx., Fl. I., 32, in part. S. robustus, Pursh, Fl. I., 56, in part.

Salt marshes on the coasts of the Atlantic and Pacific oceans, and borders of salt lakes in the prairie region. Salt marshes at Truro, and Yarmouth, N.S. (Macoun.) Common in salt marshes, N.B. (Fowler, Cat.) Salt Lake, Anticosti. (Macoun.) Saguenay River; Rivière du Loup, Q. (Burgess.) Saline lake near Turtle Mountain, Man. (Dawson.) Marshes at the File Hills, Man., and along Thunder Creek, and Old Wives Lakes, Assiniboia; very abundant in salt marshes at Qualicum, and Nanaimo; also at Alberni, on the west coast, Vancouver Island. (Macoun.) Salt marshes of the Saskatchewan. (Hooker, Fl.)

(2482.) S. fluviatilis, Gray. (River Club-Rush.)

S. maritimus, var. (?) fluviatilis, Torr. Bot. N. York, II., 354. S. robustus, Pursh, Fl. L, 56, in part.

Rather uncommon in river and lake marshes. L'Ange Gardien, and Templeton; Pointe Aux Trembles, Hochelago Co., Q. (Ami.) Marsh along the Rideau River, at the railway bridge, Ottawa. (Fletcher, Fl. Ott.) River St. Lawrence, at Prescott. (Billings.) River Trent, at the terminus of the Marmora railway, and at the "Narrows" above that point; Gull River, above Cameron Lake, Victoria Co., Ont. (Macoun.) Vicinity of Hamilton, Ont. (Logic.) Swampy marsh, Kingston, Ont. (Millman.) Port Colborne, Lake Erie. (McGill Coll. Herb.) Shallow water, Point Pelée, Lake Erie. (Burgess.) Marsh, Lake Shebandewan, west of Lake Superior. (Macoun.)

(2483.) S. rufus, Wahl.; Hook. British Flora, 414.

Blysmus rufus, Link. Salt marshes, chiefly around the Gulf of St. Lawrence. Marshy ground at the mouth of Eel River, Restigouche Co., N.B. (Fowler, Cat.) Abundant at Salt, Lake, and Becscie River, Anticosti; very common in salt marshe3 at Cape Rosier, Gaspé, and at intervals along the coast to Matane, Q. (Macoun.) Shore of River St. Lawrence, Q. (Pringle.) Around salt springs, about a mile up Red Deer River, at the head of Lake Winnipegoosis, lat. 53°. (Macoun.)

(2484.) S. sylvaticus, Linn., var. digynus, Boeck.

S. microcarpus, Presl.; Gray, Man. Ed. V., 564; Macoun, Cat. No. 1931. S. sylvaticus, Linn.; Hook., Fl. II., 230; Pursh, Fl. I., 56. S. lenticularis, Torr. Cyp., 328; Hook., Fl. II., 230.

Not uncommon in flowing water from the Atlantic to the Pacific. Truro, and Annapolis, N.S. (Macoun.) Pictou, N.S. (McKay.) Common in Kent Co.; Campbellton, N.B. (Fowler, Cat.) Brooks, Gaspé Basin, Q. (Macoun.) Montreal, and St. Andrews, Q. (McGill Coll. Herb.) Nipigon House, Lake Nipigon, Ont. (Macoun.) Lake Mis-tassini, N.E.T. (J. Richardson.) Rupert House, James Bay. (J. M. Macoun.) Moose Factory, James Bay. (Cottar & Dr. Hoyden.) Michi-picotin River, Ont. (R. Bell.) Cut Arm Creek, Saskatchewan River, Athabasca River, Peace River, and Lake Athabasca, N.W.T. (Macoun.) Medicine Hat, Alberta. (J. M, Macoun.) Common in Beaver Creek Valley and in other valleys of the Selkirk Mountains; abundant at Victoria, Nanaimo, Qualicum, Alberni, and numerous other places, Vancouver Island. (Macoun.) Canada and Hudson Bay to lat. 57°, and to the headwaters of the Columbia, in the Rocky Mountains; Sitka. (Hooker, Fl.)

(2485.) S. atrovirens, Muhl. Gram. 43.

S. polyphyllus, Vahl.; Pursh, Fl. I., 57.

S. sylvaticus var. atrovirens, Gray, Man. Ed. II. (1856.)

Not uncommon in marshes. Watery places at Halifax, N.S. (Macoun.) Caledonia, Guysboro Co., N.S. (Faribault). Wet meadows and bogs, Norton, and Fredericton; Grand Manan, N.B. (Fowler, Cat.) Quebec, and River Mingan, Lower St. Lawrence. (St. Cyr.) Abundant on the sandy banks of the Rouge River, Argenteuil Co., Q. (D' Urban.) Vicinity of Ottawa. (Fletcher, Fl. Ott.) Common at Prescott, Ont. (Billings.) Low wet meadows and ditches, common in central Ontario.

(Macoun.) Vicinity of Hamilton Ont. (Logie.) Swamps at London, Ont. (Millman. Burgess.) Point Edward, River St. Clair, Ont. (J. M. Macoun.) Fifteen miles up the Kaministiqua River, west of Lake Superior. (Macoun.) Sault Ste. Marie; Oxford Lake and Nelson River, Keewatin. (B. Bell.) Saskatchewan. Hooker, Fl.)