248 



CYPEBACEAE (SEDGE FAMILY) 



517. 



macrokolea. 



short-awned, exceeded by the plump subglobose or obovoid 

 strongly ribbed abruptly beaked perigynia. ( C. Joorii Bailey.) 

 — Swamps and wet shores, Mo. to Fla. 

 and Tex. Aug. Fig. 517. 



150. C. scabrita Schwein. Eather stout, 

 very leafy, 2-8 dm. h.gh ; cuhn sharply and 

 very roughly angled; leaves 6-18 mm. 

 broad, flat, vei-y 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-nerved, 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 G. crinita. 



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

 0.5-1.2 m. high; cuhn 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 obscur^'d by the dense stiff hairs ; scale% 

 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. flliformis, 

 var. latifolia Boeckl.) — Swales and low 

 meadows, N. B. to Sask. and B. C, s. to Pa., 

 Ill,, Kan., etc. June-July. 



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

 dm. high, extensively creeping; culm rather 

 sharply angled, rough, exceeding the 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, 



scales thin-margined, acute or 



518. C. pcabrata. 



519. C. filiforinis. 520. C. Houghtonii. 



prominently nerved and toothed 



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, roughish ; staminate spike 1. 

 rarely 2, sessile or nearly so, 2-5 cm. long ; pistillate spikes 1-3, 

 subapproximate, or rarely the lowest subradical, often staminate 

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

 flowered; pengr?/?2ia ovoid, nerved, stiffly hairy , ^hovt-heokeA, the 

 beak of ten purple and white-hyaline at the orifice, which becomes 

 fixore or less split with age ; scales thin and blunt or acute, shorter 



C. vestita. 



