222 



CYPERACEAE (SEDGE FAMILY) 



870. 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. aenea 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. adiista 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, 8-15 

 mm. long, forming a dense ovoid or ellipsoid 

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

 barely 1 mm. wide, firm, slightly nerved 



, . or nerveless. Meadows, ditches, and wet 

 872. C. sychnocephala. ' 



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



25. C. gynocrates Wormsk. Culms 0.6-3 dm. high, mostly 

 exceeding the setaceous leaves; spikes 0.5-2 cm. long, some 8 - 3 c <r v ~ l>cra tes 

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

 others staminate above, with one or more pistillate flowers below, others thick- 

 cylindric and strictly pistillate, with 6-12 rather plump subterete but thin-edged 



strongly nerved conic-beaked perigynia. (C. Sedowskiana 



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 thin mar- 



gins, strongly convex on the outer, 



flattish and feio-nerred or nerveless 



on the inner face. Bogs and mead- 

 ows near the coast, locally from Lab. to N. J. ; rarely 

 inland to Vt., Ont., N. Y., Mich., and Minn. May-Aug. 

 FIG. 374. 



27. C. stellulata Good. Caespitose ; the culms rather 

 wiry, 1-4 dm. high ; leaves shorter than or equaling the 

 culms, 1-2.5 mm. wide ; inflorescence linear-cylindric, 

 1-3 cm. long, of 2-6 subapproximate or slightly remote 

 subglobose or subcylindric 3-12-flf>ieered spikes; perigynia finally yellowish, 

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



374. C. exilis. 



875. C. stellulata. 



