220 



CYPEKACEAE (SEDGE FAMILY) 



357. V. honi 

 V. in visa. 



358. C. horm., 



V. Eichii. 

 Terminal spike 

 and perigyniuiu. 



elongate-ovate, ascending or rarely spreading, distinctly abotit 10- 

 nerved on each face; scales lance-atteiituate or aristate. (C. 

 straininea, var. aperta Boott ; C. tenera Brittoii, not Dewey.) — 

 Fresh or brackish marshes, commonest near the 

 coast, e. Que. to Del. and la. ; B. C. June-Aug. 

 P'lG. 356. — Lower small-spiked (5-8 mm. long) 

 l)lants have been separated as var. invisa (W. 

 Boott) Fernald. Fig. 357. 



Var. Richii Fernald. Perigynia 4-5 mm. long, 

 ivith siiborbicular bodies abruptly contracted to con- 

 spicuous loosely ascending or spreading tips. (C. 

 tenera, var. Fernald.) — Mass. to D. C. , Fig. 358. 



13. C. Bicknellii Britton. Culms comparatively- 

 stout, 4-1) dm. higli, smooth except at summit ; leaves 

 asceniling, rather short and firm, 2-4.5 mm. broad ; 

 inflorescence of 3-7 silvery-brown or greenish ovoid, obovoid or subglobose 

 approximate or slightly remote spikes (8-14 mm. long) ; perigynia ascending, 



with broadly ovate or siiborbi- 

 cular bodies, the tips becoming 



conspicuous, broadly loing-mnr- 



gined, when mature becoming 



almost translucent and about 10- 



nerved on each face. (C. stra- 



minea, var. Crawei Boott.) — Dry 



or rocky soil, Me. to Man., N. J., 



O., and Ark. — May-July. Fig. 



359. 



14. C. silicea Olney. Culms 

 slender, stiff, 3-8 dm. high ; leaves 

 erectish, usually glaucous, 2-4.5 

 mm. wide, often becoming involute; 



inflorescence of 3-12 usually remote conic-ovoid and clavate- 

 based u'hitish spikes (1-1.5 cm. long) ; perigynia firm 

 and opaque, 4-5 mm. long, 2.2-3 mm. broad, short-beaked, 

 hroad-vnnged, the body distinctly ^-'j-nerved on the inner, 

 Q-\2-nei'ved on the outer face. (C. foenea, var. subu- 

 lonum Gray.) — Sands and rocks 

 near the sea. Gulf of St. Law- 

 rence to N. J. June-Aug. Fig. 

 360. 



15. C. alata Torr. Culms rather 

 stout, smooth except at summit, 



leaves mostly short and harsh, 

 2.5-4.5 mm. wide, the sheath green and strongly nerved 

 nearly or quite to the narrow .mbchartaceous auricle ; 

 head oblong or ovoid, of 3-8 compact approximate 

 conic-ovoid or subcylindric spikes (8-15 mm. long) ; 

 perigynia appressed-ascending, firm and opaque, broad- 

 winged, very faintly nerved or nerveless, much broader 



than the usually rough-aicned scales. 



(C. straminea, var. Bailey.) — Marshes 



and wet woods. N. H. to Mich, and Fla 



July. Fig. 361. 



16. C. suber6cta (Olney) Britton. 



3-5 irregularly clustered spikes finally taicny or ferruginous ; 



prrigynia ovate, 4-5 mm. long, 2.3-2.8 mm. broad ; scales 



lance-ovate, mostly aionless. (C. tenera, var. Olney; C. alata, 



var. ferruginea Fernald.) — Ont. and O. to Mich., 111., and la. 



Fro. 362. 

 yc2. c. Miij.iecta. 17. C. festucacea Schkuhr. Culms ^tiff, 0.5-1 m. high ; 



359. C. Bicknellii. 



360. C. silicea. 



0.5-1 m. 



high 



361. C. alata. 

 mostly coastal. June, 



Similar ; slender ; tlie 



