Carex. CLX. CYPERACEiE. 583 



II. Stigmas three. 

 D. Spikes androgynous. Moa(Ecious. 

 !• Stamens at the. smnviit. 

 a» Spike sin ffle. 

 53, C. POLYTRicniJInKs. Mnhl. (C. microstachya. Mr.) 

 Spike oblong, tcnninal ; pcria. 3 — H, oblong, alternate, subtriquctrous, gla- 

 brous, emarginatc, twice longer than the ovate and obtuse, and rarely niuero- 

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

 — Coninion in wet and cold grounds. 



51. C. LENEociLocHiN. Ehrh. (C. pauciflora. LighJfoot.) 

 Spike about 4-flowered, with 1 or 2 J* flowers at the apex ; pcriir. lanceo- 

 late, subtriquctrous and tapering, much retlexed, twice longer than the oblong- 

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

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



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



55. C. PEDL-NCLLAT.V. Muhl. 



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

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

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

 procumbent; .>;/«. .sometimes removed a little from the 9 spike,— Common in 

 woods. Flowers early in the spring. 



56. C. WiLLDENOwii. Schk. 



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

 the stamens removed a little ; pcrig. 3 — 0, 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 g" .spike distinct; another 

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

 in Flor. 



57. C, Stendelii. Kth, 



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

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

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

 leafy ; Its. smooth, soft, narrow, longer far than the stems, — JeffersonCo., N. Y., 

 and in Ohio and the Western States. 



58. C, Backii. Boott. 



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

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

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

 usually long and leaf-like, enclosing the fruit; lis. 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 tJie base. 

 c. Spikes one, often more. 



59. C. SaUARR6SA. 



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

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

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

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

 spikes pedunculate. — Large and fine. It is C. ttiphirea Mx. when only one spike 

 is present. 



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

 both longer and smaller. 



E. Spikes diacious. 



60. C. SCIRPolDEA. Mx. 



Sjnke oblong, cylindric, acutish ; (g glume oblong, obtusish ; perig. ovate, 

 (oval), subrostrate, pubescent, longer than the ovate, acuti.sh glume, scarious 

 on the edge ; 5/, 4 — 10' high, erect ; /r5. flat and long. — White Mts,, N, H., Oakes. 



