768 Order 155.— CYPERACE^. 



170 C. retr6rsa Scliw. f. Spikes about 3, rarely 1, often viMh a few perig. at 

 the base; S spikes 4 — G, oblong, cyl., approx., dense-flowered, with long and 

 leafy bracts, the lowest often remote and long ped. ; perig. ovate-infiated, subglo- 

 bous, rostrate, bifurcate, nerved, reflexed, twice ' longer than the lane, gl.; culm 

 15 — 30', scabrous above, large, stiff, and leafy. — Bright green. In clusters, about 

 pools of water, common. The lower spikes sometimes have 1 or 2 smaller spikes 

 attached to them. 



171 C Sohv^einitzii Dew. S Spikes 2, rarely 1, upper long and slender, lower 

 with a few perig. at the base ; ? spikes 2—4, otlong, cyl, subapprox., subrecurved, 

 rather close-flowered, lowest often long-ped. ; perig. ovate-oblong, tapering above, 

 rostrate, inflated, nerved, glabrous, bifurcate, longer than the subulate, svhseiaceous 

 gl; culm 6 — 12', scabrous above, very leafy. — Pale yellowish-green. "Wet sandy 

 grounds, KT. Y., N. J., and northward. 



172 C. mirkta Dow. S Spikes 2 or more, long-oyl., near, loose, with long, 

 linear, rough-awned gls. ; 2 spiJces 2, hng-cyl., stalked, lax-flowered, suberect, 

 bracted, yellowish, staminate at apex; perig. lance-ovate, slender, long-conic, ros- 

 trate, scarcely inflated, scabrous, oblique at the long-cuspidate beak, diverging, 

 long-pediceled, equaling or longer than the narrow, rough-awned gl; culm 2f, 

 erect, very rough, stiff, shorter than the stiff, rough edged Ivs. ; light-yellowish 

 green. — (jreece, N. Y. (Bradley). (0. aristata, Boott, &o., but very different.) 



173 C. longirostris Torr. (B. t. 77.) 3 Spikes 3, short; 9 spikes 2 — 3, cyl, 

 quite loose-floivered, pendulous, suhdisiani, wim filiform ped. ; perig. ovnte, globous, 

 inflated, glabrous, long-rostrate, hispid, a little longer than the lance or ovate, cus- 

 pidate gl. ; St. 15 — 30', rather slender, stiff, .leafy below. — Bright green. On light 

 soil of hedges in N". England and N. York, common. 



174 C. Vaseyi Dew. S Spikes 2 to 4, slender, the highest long-cylindrio, tho 

 next shorter; 9 spikes 2, often 3, long-oyl., loose, remote, bractcnte, only ihn 

 lowest long-ped. ; perig. ovate-ohlong, inflated, long-terete-rostrate, somewhat triq., 

 serrate on the bifurcate beak, glabrous, veined, much longer than the lance-oblong 

 glume ; culm about 2f, erect, stiff, shorter than the rough Ivs. ; bright green. — ^Wet 

 places, K. T. to 111. (Tasey). (0. vesicaria /3. Boott, &c.) 



175 C. laciistris "Willd. i Spikes 3 — i, erect, sessile ; 9 spikes 2 — 3, erect, 

 oblong, cylindric, short-pedunculate ; perig. ovate-oblong, tapering or lanceolate, 

 bifurcate, glabrous, a little longer than the oblong, mucronate gl. ; culm 2 — 3f| scab- 

 rous above, erect and large, with long and large leaves and bracts. — Light green. 

 Marshes. Common. (C. riparia MuliL neo Gooden.) 



176 C. riparia Gooden. i Spike 3 — 5, oblong, thick, erect, sessUo; 5 spikes 

 2 — 3, erect, oblong, often long-oylindrio ; perig. ovate-elliptic, contracted into a 

 short, bifurcate beak, glabrous, about equaling or shorter than the ovate, mucro- 

 nate, or obloug-lauc. gl. ; culm 2 — 3f, scabrous above, leafy below.^Bright green. 

 Mich. (C'ooley) and westward. Distinguished from the preceding by its broader, 

 more inflated frait, and its obloiig-ovate, mucronate glume, which often surpasses 

 the perig. 



177 C. aristata R. Br. (B. t. 58.) S Spikes 2 — 4, cylindric, distant, close- 

 flowered, erect ; perig. ovate, oblong, nerved, deeply bifid, very glabrous, long- 

 rostrate, longer than the oblong, awned, greenish glume ; Ivs. and slieaths villous 

 on the under side ; st. a. foot or more high. — Bright green. "Watertown, N. Y, 

 far west and north. Is not this very closely related to No. 160 ? 



178 C. utrioulata Boott, (t. 37.) & Spikes 3 or 4, slender, cyl., long, often 

 braoteate ; $ spikes about 3, long-oyl., large, often stam. above, subremote, the 

 lowest tapering below, loose and stalked, with bracts surpassing the culm ; perig. 

 oval-oblong, drawn into a terete, tapering, bifurcate beak, smooth, veined, straw- 

 colored, larger than the lanceolate, purple, rough-awned glume; culm 2 to 3f^ 

 shorter than the broad, stiff, nodous, netted, glaucous Ivs. — Abundant in marahy 

 places wide over the country. (0. ampuUacea, /?. Carey.) 



/?. SPAESIFLOKA. Spikes all very long (4 to 6'), slender, the 9 spikes very- 

 loose, and more so below, the lowest long-pedunculate ; perig. smaller and 

 glume longer. — Watertown, N. Y. (Crawe). 



179 C ampullacea Good. S Spikes 2 or 3, cyl., erect ; 2 spikes 2 or 3, long- 

 oyl, erect, quite dense, short-ped., braoteate ; perig. ovate-globous, a littk inflated. 



