SEDGE FAMILY. 305 
40. Carex Houghtonii Torr. Houghton’s Sedge. (Fig. 710.) 
Carex Houghtonii Torr. Ann. Lyc. N. Y.3: 413. 1836. 
Culms rather stout, rough above, erect, 1°-24° 
tall, exceeding the leaves. Leaves and lowest 
bract 2’’-314’’ wide, rough, their margins more or 
less revolute; upper bracts much shorter; stami- 
nate spikes 1-3, stalked, sometimes pistillate at the 
base; pistillate spikes 2 or 3, oblong-cylindric, 14/— 
1%’ long, 3-4” in diameter, erect, rather loosely 
several-many-flowered, the upper sessile, the lower 
stalked; perigynia broadly ovoid, 14%4’’ in diam- 
eter, light green, ascending, densely pubescent, 
prominently many-ribbed, narrowed into a short 
conspicuously 2-toothed beak; scales lanceolate, 
short-awned, hyaline-margined, strongly 1-nerved, 
somewhat shorter than the perigynia; stigmas 3. 
In sandy or rocky soil, Nova Scotia to the Northwest 
Territory, south to Maine, Ontario, Michigan and Min- 
nesota. June—Sept. 
Carex lanuginosa Michx. Fl. Bor. Am. 2:175. 1803. 
Corey Diekormts var. latifolia Boeckl. Linnaea, 41: 309. 
1876. 
Carex filiformis var. Januginosa B.S.P. Prel. Cat. N. Y. 
63. 1888. 
Culm slender, but usually rather stouter than that 
of C. filiformis, sharp-angled and rough above. 
Leaves and lower bracts elongated, flat, not involute, 
1//-2/’ wide, more or less nodulose, sometimes over- 
topping the culm; staminate spikes 1-3, long-stalked, 
sometimes pistillate at the base; pistillate spikes 1-3 
usually distant, sessile or the lower slender-stalked, 
cylindric, 9/’-18’ long, 214//-3/’ in diameter; peri- 
gynia like those of C. filiformis, but rather broader; 
scales acuminate or aristate. 
In swamps and wet meadows, Nova Scotia to British 
Columbia, south to New Jersey, Pennsylvania, Kansas, 
New Mexico and California, June-Aug. 
Y Carex lanugindsa Kansana Britton. 
Plant pale; leaves %4'’-1'’ wide, very rough; perigynia '%4’’ in diameter, the ribs conspicuous. 
Missouri and Kansas. 
42. Carex filiformis L. Slender Sedge. (Fig. 712.) 
Carex filiformis \,. Sp. Pl. 976. 1753. 
Culms very slender, erect or reclining, rather 
stiff, smooth, obtusely angled, 2°-3° long. Leaves 
very narrow, involute, about 1’’ wide, rough on the 
inrolled margins, not overtopping the culm; lower 
bract similar, often equalling the culm; upper bracts 
filiform; staminate spikes 1-3, commonly 2, stalked; 
pistillate spikes 1-3, cylindric, 9’’-15’’ long, about 
3’ in diameter, erect, sessile or the lower distant 
and short-peduncled; perigynia green, ascending, 
oval, densely pubescent, faintly nerved, about 1/’ 
in diameter, tapering into a short 2-toothed beak; 
scales ovate, membranous, sometimes purplish, 
acute or short-awned, shorter than or equalling 
the perigynia; stigmas 3. 
In wet meadows and swamps, Newfoundland to 
British Columbia, south to New Jersey, Pennsylvania, 
Michigan and Minnesota. Ascends to 2000 ft. in the 
Adirondacks. Also in Europe. June-Aug. 
