232 



CYPERACEAE (SEDGE FAMILY) 



422. C. aurea. 



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

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



72. C. aurea 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 ; spike's :;.",, 

 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 

 crowded, only the lowermost subtended by an 

 elongated bract, the others short-bracted or bract- 

 less, the terminal mostly pistillate ; mature peri- 

 gynia dry and firm, white, 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- 

 g H nia straw-color, subulate, several times longer 



than the inconspicuous scales, at maturity 

 d< flexed 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 



or 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 broutnish mostly obtuse 

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

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

 A W and Ore. ; and in the mts. to N. C. June-Aug. FIG. 425. 



Aft 'V 76. C. Harpdri Fernald. Similar, 2.5-7 dm. 



high ; the more crowded spike with strongly 

 overlapping linear-oblong perigynia and whitish 

 if acuminate scales. Bogs and swampy woods, 



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



77. C. Fraseri Andrews. Caespitose ; culm 

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

 cluded in loosely sheathing leaves, smooth and stiff ; leaves 

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

 persistent, pale, l.fWJ dm. long; spike, solitary, the pistillate 

 globular, the longer staminate tip oblong; perigynia 



straw-colored, papery, ovoid, faintly nerved, 42<> 0<F| 

 much longer than the whitish scales. Rii-h 

 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 

 thina)idnlittis< , smooth or nmghish, naked above ; leaves narrow 

 and flat, shorter than the culm ; spikes 2-4, aggregated. 1-S rum. 

 long, sessileor rarely the lowest short-stalked ; prrigyiiia orbicu- 

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

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

 (C.alphia Sw.) Cold wet rocks, e. <^ue., L. Superior re-ion, 

 428. C. Halleri. Rocky Mts., and far north w. July, Aug. (Eu.) Fiu. 428. 



424. C. pauciflora. 



426. C. Harperi. 



Inflorescence ami 

 leaf-tip. 



