248 



CYPERACEAE (SEDGE FAMILY) 



517. C. macrokolea. 



c. scabrata. 



short-awned, exceeded by the plump subglobose or obovoid 

 at mill fly ribbed abruptly beaked perigynia. ( C. Joorii Bailey. ) 

 Swamps and wet shores, Mo. to Fla. 

 and Tex. Aug. FIG. 517. 



150. C. scabrata Schwein. Rather stout, 

 ?>/// leafy, 2-8 dm. high ; culm sharply and 

 renj roughly angled; leaves 6-18 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-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. andTenn., 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 Imuj. 

 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; sr<ili-s 

 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 low 

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

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



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

 dm. high, extensively creeping ; culm ratln'r 

 sharply angled, rough, exceeding the leaves ; 

 leaves flat and very sharp-pointed ; 



1-3, sessile or the lowest 

 short-stalked, erect, varying 

 from nearly globular to cylin- 

 dric, 1-4. 5 cm. long, 7-12 mm. 

 520. c. Honghtonii. thick i compact; perigynia 

 short-ovoid, stiffly pubescent, 



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



awned. Dry sandy or uravrllv soil, e. <jur. to Athabasca, s. to 



n. N. K., N. Y., Mich., and Minn. May-Aim. Fi.;. f>-jO. 



1~>. C. vestita Willd. Stout and 0^ 3-8 dm. high, freely 



stolonifefous f culm sharply angled, smooth or somewhat rough : 



leaves n<irr<>ir ami rather short, rouuhisli ; xtunihuiti' .sy *//< 1. 

 rarely L', sessile or nearly so, >2-~) rut. 'hmg ; pistillate spikes 1-3, 

 subapproximatr, ,, r rarefy the lowest subradical, often staminate 

 at top, ellipsoid or short-cylindrie. <).H-'J.8 cm. long, compactly 

 flowered; pericrania ovoid, nerved, *///tf// huh-y, short-beaked, the 



l<tk often purple and n-liilr-hiinline of tin- nr(rir<>. ir/n'cfi Ixi-nnn* 



more or less *j>/ it "//// ///, ,- scales thin and blunt or acute, shorter JWi. 0, v^tita. 



519. C. tilitor 



