^ARSx. CLX. CYPERACEiE. 58$ 



II. Stigmas three. 



D. Spikes androgynous. Monoecious. 



!• Stamens at the summit. 



a. Spike single. 



53. C. POLYTRicHoiDEs. Muhl. (C. microstachya. M.v ) 



Spike otlong, terminal ; pcrig. 3—8, oblong, alternate, subtriquetrou<; ela- 

 brous, emarginate, twice longer than the ovate and obtuse, and rarely m'ucro- 

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

 — Common in wet and cold grounds. 



54. C. LENEOGLocHiN. Ehrh. (C. paucifiora. Lightfoot.) 



Spike about 4-flowered, with 1 or 2 ^f flowers at Uie apex ; »enV lanceo- 

 iate, subtnquetrous and tapering, much reflexed, twice longer than the oblon<^- 

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

 and Hawley, Mass., in a marsh, Porter. 



b. One or 7/iore radical peduncles with a single spike. 



55. C. pedunculAta. Muhl. 



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

 vate, triquetrous, recurved at the apex, commonly glabrous, a little lon-'-'er than 

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

 rprocumbent; sia. sometimes removed a little from the Q spike.— Common in 

 woods. Flowers early in the spring. 



56. C. Wh.ldenowii. Schk. 



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

 the stamens removed a little ; pcrig. 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 lealy scales, and is frequent at the North as well as 

 in Flor. 



57. C. Stendelh. 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 lar 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- 

 ineniferous 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 

 scabrous 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. SaUARROSA. 



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

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

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

 lanceolate glume ; 5^ 1— 2f high, slender for the large spike or spikes ; Imcer 

 spikes pedunculate. — Large and fine. It is C. txjphirea Mx. when ouly one spike 

 is present. 



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

 both longer and smaller. 



E. Spikes diaedoiis. 



60. C. SCIRPOiDEA. Mx. 



Spike oblong, cylindric, acutish ; ^ glume oblong, obtusish ; perig. ovate, 

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

 on the edge ; st. 4 — 10' high, erect ; Ivs. flat and long.— White Mts., N. H., OaJct .. 



