/ 

 CAREX. CLX. CYPERACE^E. 583 



II. Stigmas three. 



D. Spikes androgynous. Monoecious. 



! Stamens at the summit. 



a. Spike single. 



53. C. POLYTRicHolDEs. Muhl. (C. microstachya. MX.} 



Spike oblong, terminal ; perig. 3 8, oblong, alternate, subtriquelrous, gla- 

 rous, emarginate, twice longer than the ovate and obtuse, and rarely mucro- 

 tate glume ; st. 4 12' high, very slender, with setaceous and subradical leaves. 

 Common in wet and cold grounds. 



54. C. LENEOGLOCHIN. Ehrh. (C. pauciflora. Lightfoot.} 



Spike about 4-flowered, with 1 or 2 tf flowers at the apex ; perig. lanceo- 

 late, subtriquetrous and tapering, 'much reflexed, twice longer than the oblong- 

 lanceolate glume; st. 3 8' high, with subradical and linear leaves. In Ashfield 

 and Hawley, Mass., in a marsh, P&rler. 



b. One or more radical peduncles with a single spike. 



55. C. PEDUNCULATA. Muhl. 



Spikes about 5, 3-sided, distant, long, recurved, pedunculate; perig. obo- 

 vate, triquetrous, recurved at the apex, commonly glabrous, a little longer than 

 the oblong or obovate, mucronate glume; st. 4- 12' high, triangular, rather 

 procumbent; sta. sometimes removed a little from the 9 spiket Common in 

 woods. Flowers early in the spring. 



56. C. WILLDENOWII. Schk. 



Sts. or radical ped. 1 3 ; spike commonly single, stameniferous above, or 

 the stamens removed a little ; perig. 3 6, alternate, loose, oblong and inflated a 

 little, tapering at the base and conic-rostrate above ; 9 glumes ovate and acute, 

 the lower ones long and leaf-like, much surpassing the stem. On dry grounds, 

 common throughout the U. S. One variety has the $ spike distinct ; another 

 is destitute of the long and leafy scales, and is frequent at the North as well as 

 in Flor. 



57. C. STENDBLII. Kth. 



Sts. or radical ped. 1 8' long ; spike commonly single, stameniferous 

 above ; perig. 1 4, subglobose or ellipsoid and inflated, alternate, stipitate, 

 terete and conic-rostrate, with an oblique orifice ; 9 glumes usually long and 

 leafy ; Ivs. smooth, soft, narrow, longer far than the stems. Jefferson Co., N. Y., 

 and in Ohio and the Western States. 



58. C. BACKII. Boott. 



Ped. radical, 1 4f high, stiff, thick or large; spike single, commonly sta- 

 meniferoas above, short ; perig. ovate, globose, smooth, conic-rostrate, entire at 

 the orifice, when mature pear-shaped, the beak articulated to the fruit; 9 glumes 

 usually long and leaf-like, enclosing the fruit; Ivs. radical, flat, thick, rough or 

 fabrous and short. Jefferson Co., N. Y. and Arctic Am. The three preceding 

 species are closely related, and yet look very different. 



2. Spikes staminate at the base. 

 c Spikes one, often more. 



59. C. SQUARROSA. 



Spikes 1 4, oblong, cylindric, obtuse, upper one attenuated below at firsi 

 by the decurrent, $ flowers, all very densely flowered ; perig. ovate, subglobose, 

 long-rostrate, 2-toothed, horizontal, glabrous and subsquarrose, longer than the 

 lanceolate glume ; st. 1 2f high, slender for the large spike or spikes ; lower 

 spikes pedunculate. Large and fine. It is C. typhirea MX. when only one spike 

 is present. 



ft. ( C. typhinoides. Schw.) Spikes 2, the lower on a very long peduncle, and 

 both longer and smaller. 



E. Spikes dioecious. 



60. C. SCIRPOlDEA. MX. 



Spike oblong, cylindric, acutish ; J* glume oblong, obtusish ; perig. ovate, 

 (oval), subrostrate, pubescent, longer than the ovate, acutish glume, scarious 

 on the edge ; st. 410' high, erect ; Irs. flat and long. White Mts., N. H., Oafa . 



