222 



CYPEBACEAE (SEIHiK FAMILY) 



370. C. aenea. 



face, nerveless or only slightly nerved at the golden-yellow base. Open prairies, 

 Man. to Kan., and westw. July. FIG. 369. 



22. C. adnea Fernald. Culms smooth and wiry, but 



more or less flexuous at tip, 0.25-1.2 m. high; leaves 



much shorter, rather soft and flat, 2-4 mm. broad ; 



inflorescence loosely cylindric or moniliform, of 3-12 



obovoid mostly clavate-based brownish or ferruginous 



spikes (0.8-2.5 cm. long, in luxuriant plants olten 



peduncled or compound) ; peri- 



gynia loosely ascending, dark 



green or brown when mature, 



4-5 mm. long, 1.9-2.7 mm. broad ; 



achene 1.3-1 .7 mm. broad. Open 



woods, dry banks, or rarely in low 



ground, Lab. to B. C., s. to Ct., 



Mich., etc. May-July. FIG. 370. 

 23. C. adusta Boott. Culms stiffly erect, smooth, 

 2-8 dm. high ; leaves usually shorter, 2-5 mm. broad ; 

 inflorescence erect, dense and stiff, ovoid or cylindric, 

 often subtended by a stiff promi- 

 nent bract, of 3-15 simple or com- 

 pound full and rounded brownish 



spikes (6-12 mm. long) ; perigynia 4-5 mm. long, 2-3 mm. 

 broad; achene 1.8-2.1 mm. broad. Dry woods, gravelly 

 banks, etc., Nfd. to Mt. Desert I., Me., w. to Minn, and far 

 northw. June-Sept. FIG. 371. 



24. C. sychnoc&phala Carey. Culms smooth, 2-6 dm. 

 high ; leaves soft, ascending, 2-4 mm. wide ; bracts very 

 unequal ; spikes 4-10, subcylindric, 8-1 "> 

 mm. long, forming a dense ovoid or ellipsoid 

 head ; perigynia lance-subulate, 5mm. lonjr, 

 barely 1 mm. wide, firm, slightly nerved 

 or nerveless. Meadows, ditches, and wet 



872. G. sychnocephala. 



371. C. adusta. 



and B. C. July, Aug. FIG. 372. 



25. C. gyn6crates Wormsk. Cu Ims 0.6-3 dm. high, mostly 

 exceeding the setaceous leaves; spikes 0.5-2 cm. long, some 373.0. 

 staminate and linear, with oblong mostly blunt-tipped scales, 

 others staminate above, with one or morepistillate flowers below, others thick- 

 cylindric and strictly pistillate, with 6-12 rather plump subterete but thin~e>!<je<( 

 strongly nerved conic-beaked perigynia. (C. Redowskitnm 

 Bailey, not C. A. Mey.) Swamps and bogs, Lab. to 

 Alaska, s. to N. B., Me., N. Y., w. Pa., Mich., and Col. 

 June-Aug. (Eurasia.) FIG. 373. 



26. C. exilis Dewey. Culms rigid, usually much exceed- 

 ing the filiform stiff leaves ; spikes mostly solitary, 1-3 cm. 

 long, staminate, pistillate, or with the flowers variously situ- 

 ated; perigynia ovate-lanceolate, with serrulate tit in mar- 

 gins, strongly convex on the outer, 

 flattish and fcic-nerved or nerveless 

 on the inner face. Bogs and mead- 

 ows near the coast, locally from Lab. to N. J. ; ran -ly 

 inland to Vt., Ont., N. Y., Mich., and Minn. May-An-j;. 

 FUJ. 374. 



27. C. stellulata Good. Caespitose ; the c nlm s ruthrr 

 '////, 1 1 ilm. hi.n'li ; leaves shorter than or equaling the 

 culms, 1-'J.."> MUM. wide ; inflorescence, linear-cylindric, 

 !-:{ cm. /ON;/, of '2 ', sHlxtpproximate or slightly remote 

 snb^lohosc or snlx-ylindric 3-12-_/lo?/v/vJ spikes ; ))cri<n/i<t 



ovate, early ascending, later wide-spreading, faintly nerved or nerveless 



874 C exilis 



.ST. r ). ('. stcllnliit.-i. 



