248 



CYPERACEAE (SEDGE FAMILY) 



517. C. macrokolea. 



518. C. scabrata. 



short-awned, exceeded by the plump subglobose or obovoid 

 strongly ribbed abruptly beaked perigynia. ( C. Joorii Bailey, j 

 — Swamps and wet shores, Mo. to Fla. 

 and Tex. Aug. Fig. 517. 



150. C. scabrata Schwein. Rather stout, 

 vei'y leafy, 2-8 dm. high ; culm sharply and 

 very roughly angled; leaves 0-18 mm. 

 broad, flat, very rough; spikes 3-6, scat- 

 tered, the upper 1 or 2 sessile, the remainder 

 often long-peduncled and sometimes nod- 

 ding, 1-6 cm. long, narrowly cylindrical 

 and compactly flowered : perigynia broadly 

 ovoid, prominently few-nerin^d, rough, the 

 beak nearly as long as the body and 

 slightly toothed; scales acute and rough- 

 tipped, green-nerved, about as long as the 

 body of the perigynia. — Wet meadows 

 and glades, e. Que. to Ont., s. to the mts. 

 of S. C. and Tenn., O., and Mich. June-Aug. Fig. 518. — 

 Hybridizes with C. crinita. 



151. C. filif6rmis L. Tall and very slender but erect, 

 0.5-1.2 m. high; culm obtuse, smooth; leaves very long, 



involute-filiform, rough ; spikes 1-3, ses- 

 sile, somewhat scattered, erect, short and 

 thick, 1-5 cm. long, 5-7 mm. thick ; peri- 

 gynia very short-ovoid, the teeth very 

 short, the few nerves obscured by the dense stiff hairs ; scales 

 thin and blunt, about as long as the perigynia. — Bogs and 

 shallow water, Nfd. to B. C, s. to Pa. and the Great Lake 

 region. May-Aug. (Eu.) Fig. 519. 



152. C.lanuginbsaMichx. Similar; lower; 

 culm mostly rough above; leaves flat, 2-5 

 mm. broad ; spikes usually somewhat .slim- 

 mer, the lowest usually peduncled; scales 

 mostly sharper and longer. (C. filiformis, 

 var. latifolia Boeckl.) — Swales and Jow 

 ni^eadows, N. B. to Sask. and B. C, s. to Pa., 

 111., Kan., etc, June-July. 



153. C. Hought5nii Torr. Stiff, 1.5-6.5 

 dm. high, extensively creeping ; culm rather 

 sharply angled, rough, exceeding tlie leaves ; 

 leaves flat and very sharp-pointed ; spikes 

 1-3, sessile or the lowest 

 short-stalked, erect, varying 

 from nearly globular to cylin- 

 dric, 1-4.5 cm. long, 7-12 mm. 

 thick, compact ; perigynia 

 short-ovoid, stiffly pubescent, 



prominently nerved and toothed ; scales thin-margined, acute or 

 awned. — Dry sandy or gravelly soil, e. Que. to Athabasca, s. to 

 n. N. E., N. Y., Mich., and Minn. May-Aug. Fig. 520. 



154. C. vestita Willd. Stout and stiff, 3-8 dm. high, freely 

 stoloniferous ; culm sharply angled, smooth or somewhat rough : 

 leaves narrow and rather short, rougliish ; staminate spike 1, 

 rarely 2, ses.sile or nearly so, 2-5 cm. Umg ; i)i.stillate spikes 1-3, 

 subapproximate, or rarely the lowest subiadical, often staiiiiiiate 

 at top, ellipsoid or short-cyliudric, 0.8-2.8 cm. long, compactly 

 flowered; perigynia ovoid, nerved, stiffly hairy, sliort-beaked, the 

 beak often i>ur|)h' and vliih'-liy alive at the orifice, luhirh berames 

 more or less split ivilh age ; scales thin and blunt or acute, shorter r-ii. c. vesUta. 



.519. C. filiformis. 520. C. Houghtonii. 



