(2545.) C. Hoodii, Boott, Hook., Fl. II., 211, (1840.) C. congesta, C. A. Meyer, vide, Boott.

In grassy thickets, Cypress Hills, Alberta. (J. M. Macoun.) Nachacco River, and McLeod's Lake, northern British Columbia, lat. 55°. (Macoun.)

(2546.) C. incurva, Lightf. (1777); Hook., Fl. II., 211.

On the summit of the mountain which rises north from Kicking Horse Lake, Rocky Mountains. (Macoun.) Cumberland House, Bear Lake, and Rocky Mountains. (Hooker, fl) Valley of the Mackenzie River. (Richardson.) Greenland. (Lange.)

(2547.) C. Stenophylla, Vahl. (1803); Hook., Fl. II., 211.

C. duriuscula, C. A. Meyer, Cyp. Nov., 214, (1831.) Not uncommon throughout the prairie region, from Portage la Prairie westward to Kananaskis Station in the Rocky Mountains. (Macoun.) Prairie west of Turtle Mountain, Man. (Dawson.) Carleton House, on the Saskatchewan; Rocky Mountains. (Hooker, Fl.)

{2548.) C. chordorhiza, Ehrh.; Hook., Fl. II., 211.

C.fulvicoma. Dew. Sill. Journ. XXIX., 249, (1836); Hook., Ft II., 211. Peat bogs and marshes, generally northward. Shippegan, N.B. (Hay.) Lakeville, Carleton Co., N.B. (Brittain.) Salt Lake, and Ellis Bay, Anticosti; marsh at the mouth of the Kaministiqua, on the left bank. (Macoun.) Marshes, London, Ont. (Burgess. Millman.) Lake Mistassini, N.E.T. (J. M. Macoun.) Peat marsh, Telegraph Trail, lat. 54°, B.C. (Macoun.) Hudson Bay to Cumberland House; Lake Winnipeg, Norway House and Cumberland House, Saskatchewan River. (Hooker, Fl.)

+ + Spikelets male at bottom.

(2549.) C. festiva, Hew. Sill. Journ. XXIX., 246, (1836); Hook., Fl. II., 215.

C. oreades, C. A. Meyer, Bull. Acad. Brux. IX., 248/(1842). Very abundant from the prairie region westward to the Pacific coast, in thickets and meadows. White Mud River, 49th parallel: Michel Creek, Crow Nest Pass, Rocky Mountains. (Dawson.) In coulees and willow clumps, Cypress and Eagle Hills, and northward to Lesser Slave Lake; common in damp meadows and thickets, from Morley through the Rocky and Selkirk mountains, and northward in British Columbia; very abundant in meadows and thickets throughout Vancouver Island. (Macoun.) Cumberland House to Bear Lake; Rocky Mountains. (Hooker, Fl.) Fraser River, near Yale, B.C. (Fletcher.) Lake Lindeman, lat. 59°, B.C. (Dawson.) Shuswap Lake, B.C. (Prof. Fowler.) Greenland. (Lange.)

Var. Haydeniana, W. Boott, Bot. Calif. II., 234, (1880.)

C. Haydeniana, Olney, Bot King's Exp. V., 364, (1871.) On the summits of the higher Rocky Mountains, from Castle Mt. to Kicking Horse Lake. (Macoun.)

Var. gracilis, Olney, Proced. Am. Acad., 407, (1872.)

On the beds of "snow slides" at the summit of the Seikirk Mountains, and at Golden City, in the Columbia Valley, B.C.; abundant in meadows and thickets in many parts of Vancouver Island, especially at Victoria and Nanaimo. (Macoun.)

(2550.) C. athrostachya, Olney, Proced. Am. Acad. VII.,"""393,

(1871.) Grassy thickets and meadows, growing in large clumps.

Abundant in the Cypress and Bear Hills, Alberta; in British Columbia, at McLcod's Lake, lat. 55°; quite common in meadows and thickets in the neighborhood of Victoria, and Nanaimo, Vancouver Island. (Macoun.)

(2551.) C. sychnocephala, Carey, Sill. Journ. IV., 24, (1847.)

C. cyperoides, Dew. Sill. Journ. III., 171, (1847.) Quite common in many localities in Ontario and the prairie region. Always found growing in tufts in ditches and wet, sandy places. Ditches along the Canadian Pacific railway, near Ottawa. (Fletcher, Fl. Ott.) Near the Freight House, Prescott Junction, Ont. (Billings.) Millpond, Madoc Village; in a meadow along the Moira River, Marmora township, and along Crow River, near Marmora village, all in Hastings Co.; abundant along the Port Hope and Lindsay Railroad, three miles south of Lindsay; border of a swamp five miles from Owen Sound, on the road to Southampton, Ont.; abundant on the margin of ponds, from Manitoba westward to near Battleford, on Battle River. (Macoun.) Quite common in gravel and wet sand, on the west shore of Lake Winnipeg. (J. M. Macoun.)

* * * Spikelets distinct or nearly so. + Spikelets male at top.

(2552.) C. tenella, Schkuhr, Riedgr. 104, (1801.)

C. disperma, Dew. Sill. Journ. VIII., 266, (1824); Hook., Fl. II., 211. C. gracilis, Gray, Sill. Journ. IV., 22, (1847.)

Abundant in cedar swamps and wet woods generally, from the Atlantic to the Pacific. Newfoundland. (Cormack.) Truro, and sphagnum swamp at the head of the North West Arm, Halifax, N.S. (Macoun & Burgess.) Magdalen Islands. (J. Richardson.) Near Pictou, N.S. (McKay.) Damp shady woods, Bass River, N.B. (Fowler, Cat.) Tobique River, N.B. (Hay.) Bogs at Salt Lake and Jupiter River, Anticosti. (Macoun.) Island of Orleans, Q. (St. Cyr.) Madeline River, Gaspé, Q. (Porter.) Recollet Swamp, Montreal. (C. F. McCrea.) Abundant at Sugar Bush Lake, Montcalm Co., Q. (D' Urban.) Dow's Swamp and other places at Ottawa. (Fletcher, Fl. Ott.) Marshy swamp near Prescott Junction, Ont. (Billings.) Kemptville, Ont-(Porter.) Cedar swamps and borders of ponds throughout central Ontario, and to Lake Superior and all the northern forest region. (Macoun.) Vicinity of Hamilton, Ont. (Logie.) Swampy ground, Komoka, Ont. (Millman.) Swamps at London, Ont.; and Lake of the Woods. (Burgess.) York Factory, Hudson Bay; Oba Lake, Ont. (R. Bell.) Eastern summit of North Kootanie Pass, Rocky Mountains. (Dawson.) In swamps in northern Manitoba, and north-westward to Peace River, lat. 56°; common in swamps at Morley and westward through the Rocky Mountains to Donald in the Columbia Valley; northward through British Columbia to McLeod's Lake, lat. 55°; rare on Vancouver Island, only noted on Mount Mark, near Qualicum. (Macoun.) Common in British America to the Rocky Mountains. (Hooker, Fl.)

+ + Spikelets male at bottom.

(2553.) C. trisperma, Lew. Sill. Journ. IX., 63, (1825); Hook., Fl. II., 213.