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SEDGE FAMILY. 297 
16. Carex ambusta Boott. Blackened Sedge. (Fig. 686.) 
Carex ambusta Boott, Ill. 64. pl. 772. 1858. 
Similar to C. saaatilis, culms slender, erect, 8’/— 
18’ tall, nearly or quite smooth. Leaves nearly or 
quite smooth, elongated, mostly less than 1/’ wide, 
inyolute in drying, nearly erect, shorter than the 
culm; bracts similar to the upper leaves, sometimes 
equalling or overtopping the culm; staminate spike 
solitary, stalked; pistillate spikes 1 or 2, oblong, 
erect, obtuse, densely many-flowered, slender- 
stalked or the upper nearly sessile, 6’’-9’’ long, 
about 3's’ in diameter; perigynia oblong-lanceo- 
late, 114’ long, rather more than 14’ wide, spread- 
ing or ascending, biconvex, smooth, firm, not at all 
inflated, dull, faintly few-nerved at the base, green 
below, dark brown at the summit, tapering into a 
short minutely 2-toothed beak; scales lanceolate, 
dark brown, as long as the perigynia; stigmas 2. 
Labrador, British Columbia to Alaska. Summer. 
17. Carex utriculata Boott. Bottle Sedge. (Fig. 687.) 
Carex utriculata Boott; Hook. Fl. Bor. Am, 2: 221. 
Yh 1840. ; 
Carex utriculata var. minor Boott, loc. cit. 1840. 
Glabrous, culms stout, erect, 2°-4° tall. Teaves 
elongated, nodulose, the upper mostly exceeding’ 
the culm, 2/’-6’’ wide, the midvein prominent; 
bracts overtopping the culm; staminate spikes 2-4, 
linear, stalked, the lower occasionally pistillate at 
the top and usually subtended by a very slender 
bract; pistillate spikes 3 or 4, nearly erect, cylin- 
dric, densely many-flowered or sometimes looser 
near the base, 2’-6’ long, the lower short-stalked, 
the upper sessile, sometimes staminate at the sum- 
mit; perigynia spreading when old, ovoid, light 
green, somewhat inflated, few-nerved, 2//-2%4/” 
long, narrowed into a sharp 2-toothed beak; scales 
lanceolate, the lower awned and slightly longer 
than the perigynia, the upper acute; stigmas 3. 
Marshes, Anticosti to British Columbia, Delaware, 
Ohio, Minnesota, Nevada and California. June-Sept. 
18. Carex monile Tuckerm. Necklace Sedge. (Fig. 688.) 
Carex monile Tuckerm. Enum. Meth. 20. 1843. 
Carex Olney? Boott, Il. 15. fl. 42. 1858. 
Glabrous, culm slender, erect or reclining, 11%4°-3° 
tall. Leaves elongated, rather light green, 114//-214// 
wide, sometimes exceeding the culm, little or not at 
all nodulose; bracts similar, often overtopping the 
culm; staminate spikes 1-4, usually 2 or 3, slender- 
stalked, commonly subtended by short bracts; pistil- 
late spikes 1-3, erect-spreading, cylindric, 1/-3/ long, 
about 4’’ in diameter, many-flowered, rather loose at 
maturity, the upper sessile, the lower one, when 3, 
slender-stalked and usually remote; perigynia yellow- 
ish green, ascending or spreading, ovoid, inflated, 
about 214’ long, rather strongly 8-1o-nerved, tapering 
into a sharp 2-toothed beak; scales lanceolate, acumi- 
nate or awned, shorter than the perigynia; stigmas 3. 
In marshes and wet meadows, Nova Scotia to British 
Columbia, south to New Jersey, Missouri, in the Rocky 
Mountains to Colorado, and to California. June—Aug. 
