590 CYPERACE.E. (SEDGE FAMILY.) 



perifrynia ovjil-triangular, narrowed to each end, the point either strongly or 

 sometimes siiglitly recurved. — A most polymorphous sjiecies ; very eommon 

 in ()i)en woods, cojjses, &e. The leading tbrms were collated by Dr. Boott as 

 follows. — The typical form taken by him (C. striiitula, Mkhr.) has the leaves 

 long and narrow (2"-4" wide), spikes ahout 1' long and loosely flowered ; peri- 

 gynia with a slightly recurved or almost straight point, their scale c,\ee])t the 

 lowest nearly pointless ; sterile spike mostly conspicuous and long-pcdundcd. 



— Var. STVLOKLE.XA, Boott. (C. stylofle.xa, Dew. C. fusiformis, C/ia/nwm.) 

 Slender, the weak filiform culms l°-2^° long; fertile spikes 2-4, short, 5-10- 

 Howered, the lowest on a long setaceous peduncle ; bracts mostly shorter than 

 the culm ; pcrigynia more tapering or triangular-fusiform, the point commonly 

 recurved. New Jersey {C. F. Austin), renn. (Piqf. Por(fr), and southward. 



— Var. PLANTAGfNEA, Boott (var. patulifolia of former edition. C. planta- 

 ginea, Scfik:), has the root-leaves 5"- 7" broad, otherwise as in the typical form. 



— Var. iNTEUMKDiA, Boott (C. anceps, Willd., Schk:), includes various slender, 

 narrow-leaved forms, with loosely-flowered spikes, but otherwise as the next. 

 — Var. BLA.NDA (C. blanda, Z>eu;. C. laxiflora, var. striatula, Ed. 2), includes 

 narrow-leaved forms, 6' -18' high, with the sterile spike usually short or 

 club-shaped and nearly sessile ; the fertile oblong and dense, the uppermost 

 approximate ; bracts much surpassing the culm ; pcrigynia obovate with a short 

 abruptly bent point; scale usually awn-pointed. — Var. latifolia, Boott, has 

 a broadly and very sharp-angled culm, and very broad leaves and bracts 

 (8" -15" wide), inconspicuous sterile spike, the fertile ones cylindrical and 

 loosely flowered, but the broad perigynium much longer than the truncate or 

 abruptly short-pointed scale. 



•t- -t- Pen'(ji/ni(i denselij striate, or as if finely wrinkled rather t/inn nerved, of a firm 

 texture, obscurely triangular, with a callous orifice : style thickened ahore the base : 

 scale ivUh the soiwwhat H-nemed keel extended into a stout roufjh uwn or point, 



90. C. oligoearpa, Schk. Fertile spikes small, 3 - 8-flowered ; the 

 point of the perigynium straight or slightly oblique, not recurved ; leaves 

 rough only on the edge; sheaths smooth. (C. Sartwelliana, Guy.) — Woods, 

 W. New England to Illinois and Kentucky. — Culm slender, 6'- 12' long. 



91. C. Hitehcockiana, Dew. Fertile spikes .very loosely 3- 5-flowered ; 

 apex of the pciigynium recurved ; sheaths and upper side of the Imres roughly 

 pubescent. — Woods, New England to Illinois and Kentucky. — Culml°-2° 

 high, stouter, and fruit larger than m the last. 



§ .5. Pirigyniuin vu'lhout a beak, smooth or downy, not inflated, obovoid-triquetrons, 

 with a minute obliquely bent white and membranaceous point, reddish-brown 

 or olive-colored at maturity : bracts reduced to colored sliealhs, or with a short 

 green prolongation : leaves all radical, narrow or bristle-shaped. — DigitXt.i;. 



92. C. eblirnea, Boott. Sterile spike solitary ; tha fertile 3-4, erect, about 

 b-floinrfd, (ij)pro.riiiialid and elevated on long stalks aliove the staminale spike : the 

 lowest sometimes a little remote; pcrigynia obscurely nerved, smooth and shin- 

 ing, rather longer than the broad and obtuse membranaceous whitish scale. 

 (C. alba, var. sctifolia, Dew.) — Limestone rocks. N. New England to Kentucky, 

 aiid northward. — A delicate species, with very slender culms, 4'- 10 high, and 



