282 



CYPERACEAE (^SEDGE FAMILY^ 



423. 



bicolor. 



slightly if at all staminate at tip ; scales very sharp and spreading, longer than 

 the perigynia. (C. Haydeni Dewey.) — Me. to Ky., Ont., and la. 



72. C. aiirea Nutt. Low and slender, 0.5-5 dm. high; leaves pale green, 



narrow (1-3 mm. wide); 2 or 3 of the bracts exceeding the culm ; spikes 3-5, 



all but the lowest usually approximate, peduncled or the upper one 



or two sessile, erect, loosely few-flowered or sometimes becoming 



2 cm. long, at maturity yellow or brown, the terminal one fre^ 



quently pistillate above ; perigynium fleshy at maturity, plump, 



nerved, about 2 mm. long, rounded or slightly depressed at tip, 



longer than the blunt white or pale-brown scale. — 



Wet meadows and springy banks, Nfd. to B. C, 



s. to n. Ct., centr. N. Y., n.w. Pa., Ind., Wise, etc., 



mostly in calcareous regions. June-July. Fig. 422. 



/"^^ 73. C. bicolor All. Similar ; spikes mostly 



%^M gLf crowded, only the lowermost subtended by an 



l|r I elongated bract, the others short-bracted or bract- 



, less, the terminal mostly pistillate ; mature peri- 



<^ . aurea. gyj^^^^ ^^ ^^^^ flmi, ichite, pulverulent, tapering to 



the short tip ; scales dark brown or purplish. — Wet ledges and 



gravelly shores, Lab. to n. Me. ; n. shore L. Superior. June-Aug. (Greenl., 



Eu.) Fig. 423. 



74. C. pauciflbra Lightf. Very slender but erect, stiff, 

 0.5-6 dm. high ; leaves very narrow, usually much shorter 

 than the culm ; staminate and pistillate flowers 2-5 ; peri- 

 gynia straw-color, subulate, several times longer 

 than the inconspicuous scales, at maturity 

 deflexed and easily detached. — Cold bogs, Nfd. 

 to Alaska, locally s. to Ct., Pa., Mich., Minn., 

 etc. June, July, (Eu.) Fig. 424. 



75. C. leptalea Wahlenb. Capillary, erect 

 424. C. pauciflora. ^r slightly diffuse, 0.5-5 dm. high ; leaves mostly 425. C. leptalea 



shorter than the culm ; spike 0.4-1.6 cm. long, 

 staminate portion small, the subalternate thin green nervose oblong or narrowly 

 ellipsoid blunt perigynia about twice longer than the brownish mostly obtuse 

 caducous scales. (C. polytrichoides Muhl.) — Bogs and wet 

 meadows, Nfd. to B. C, s. to Pa., the Great Lakes, Mj., Col., 

 and Ore. ; and in the mts. to N. C. June-Aug. Fig. 425. 



76. C. Harpdri Fernald. Similar, 2.5-7 dm. 

 high ; the more crowded spike with strongly 

 overlapping linear-oblong perigynia diudi whitish 

 acuminate scales. — Bogs and swampy woods. 

 Pa. to Fla. and Tex. May-July. Fig. 426. 

 ^6. C. Harperl. 77. C. Fiaseil Andrews. Caespitose ; culm 

 2-5 dm. high, naked or the lower portion in- 

 cluded in loosely sheathing leaves, smooth and stiff ; leaves 

 broad, destitute of midrib, closely many-ribbed, very thick and 

 persistent, pale, 1.5-6 dm. long; spike solitary, the pistillate 

 portion globular, the longer staminate tip oblong ; perigynia 

 straw-colored, papery, ovoid, faintly nerved, 

 much longer than the whitish scales. — Rich 

 mountain woods, Va., W. Va., and south w. ; 

 local. May-July. Fig. 427. 



78. C. Halleri Gunn. Small and slender, 1-6 dm. high ; culm 

 thin and obtuse, smooth or roughish, naked above ; leaves narrow 

 and flat, shorter than the culm ; spikes 2-4, aggregated, 4-8 mm. 

 long, sessile or rarely the lowest short-stalked ; perigynia orbicu- 

 lar to elliptic, nerveless or nearly so, the short beak slightly 

 notched, a little longer than the ovate purple-brown obtuse scales. 

 (C. alpina Sw.) — Cold wet rocks, e. Que., L. Superior region, 

 Rocky Mts., and far north w. July, Aug. (Eu.) Fig. 42$. 



♦' 



427. C. Fraseri x % 



Inflorescence and 



leaf-tip. 



HaUeri. 



