CAEEX C f PERACE^ 701 



nodding on long peduncles and loosely flowered afbase : scales purple or 

 ferruginous, pale in the middle, lanceolate or oblong, ciliate, acute or 

 with a rough awn, rarely obtuse : perigynia oval, ovate, round or obovate 

 abruptly or gradually beaked with the orifice varying from nearly entire 

 to bidentate with serrate teeth, coriaceous, sparingly toothed on 

 the upper margins, compressed lenticular, punctate, broader than the 

 scale. In dry alluvial soil, southern Oregon fo California. 



C. Xebraskensls. Dewey Sill. Journ. xviii, 102. Stems rather stout, 

 erect,s harply angled 1-2 feet high : leaves pale green, 2-3 lines wide, rough- 

 margined, not exceeding the stem: lower bract foliaceoua, sometimes 

 equalling the stem, the upper much shorter and narrower : staminate 

 spikes commonly 2, peduncled : pistillate spikes 2-4, dense, oblong-cylindric, 

 erect, 9-15 lines long, about three lines thick, sessile or the lower on short 

 peduncles: perigynia elliptic or somewhat obovate, short-beaked, the 

 beak 2-toothed, longer than the ovate or lanceolate acute brown scale : 

 stigmas 2. In wet places eastern Oregon and Washington to Nebraska 

 and New Mexico. 



C. aqnatilis Wahl. Kongl. Vet. Acad Handl. (11) xxiv, 165. 

 Stems-KffllerstoutverBet, sharp angled above, smooth ,pr nearly so, 2-4 

 feet high ; leaves elongated, sometimes equalling the stem, 2-3 lines wide : 

 bracts similar to the leaves, the lower exceeding the stem : staminate 

 spikes 1-3, peduncled : pistillate spikes narrowly linear-cylindric, often 

 staminate at the summit, erect or slightly spreading 1-2 inches long, 2-3 

 lines thick, sessile and dense or the lower narrowed and loosely-flowered 

 at the base, and short peduncled : . perigynia elliptic, green, minutely 

 beaked, the orifice entire, longer than or equalling the oblong scale : stig' 

 mas 2 In swamps arid along streams. California to Brit. Columbia and 

 the Atlantic States : also in Europe. 



C. strlcta Lam. Encycl. iii, 387. Stems slender, stifiE, erect, usu- 

 ally in dense tufts, sharply angled, rough above, 1)^-4 feet high : leaves 

 long, rarely exceeding the stem, very roiighon the margins 1-2 lines wide : 

 lower bracts similar, sometimes equalling the stem: staminate spikes 

 solitary or sometimes 2, peduncled : pistillate spikes 2-5, linear-cylindric, 

 often staminate at the top, very densely -flowered, or loose at base ^-2 

 inches long, about 2 lines thick, all sessile or the lower peduncled : perigy- 

 nia ovate elliptic, ascending, acute, a line long or less, minutely beaked 

 the orifice entire or nearly so, longer than the brown purple green-mar- 

 gined' oblong or lanceolate scale: stigmas 2. In swamps, California to 

 Washington and the Atlantic States: 



C. interrupta Bceckl. Linnsea xl. 432. Stems slender, erect, 12-16 

 inches high, aharfjly angled above : leaves elongated, usually exceeding 

 the stem about 2 lines wide; bracts allshorter than the infloresence: atam- 

 nate spike usually solitary, 8-10 lines long, pistillate spikes 3-5, 6-18 lines 

 long, about 2 lines thick," often staminate at the top, densely flowered 

 above, the lower ones loose and often interrupted at base ; sessile or the 

 the lowest one short-peduncled: scales brown with pale midrib and mar- 

 gins, nearly as long as the perigynium, broadly lanceolate appressed: 

 perigynia small, green, elliptical, shortly beaked. Along mountain 

 streams. Western Oregon. 



C. lentlcnlarls Michx. Fl ii, .172. Stemg very slender, erect 1-2 

 feet high : leaves rarely over a line wide, shorter or rarely longer than the 

 stem, slightly rough on the margins: lower bracts similar to the leaves, 

 usually much longer than the spikes : staminate spikes solitary or rarely 2, 

 sessile or short peduncled, often pistillate above: pistillate spikes 2-5, 

 clustered at the summit or the lower distant, sessile or the lower short 

 peduncled: 4-12 lines long, about 2 line^ thick : perigynia ovate or ellip- 

 tic, acute, tipped with a minute entire beak longer than the appressed 



