708 Order 155.— CYPERACE^E. 



170 C. retr6rsa Schw. 6 Spikes about 3, rarely 1, often with a few pong, at 

 the base; ? spikes 4 — G, oblong, cyl., approx., dense-flowered, with long ar.d 

 leafy bracts, the lowest often remote and long ped. ; perig. ovate-inflated, 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. Tho lower spikes sometimes have 1 or 2 smaller spikes 

 attached to them. 



L71 C. Gchweinitzii Dew. 5 Spikes 2, rarely 1, upper long and slender, lower 

 with a few perig. at the base; $ spikes 2 — i, oblong, cyl, subapprox., subreturved, 

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

 rostrat?, inflated, nerved, glabrous, bifurcate, longer than the subulatf, substtaceottt 

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

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



L72 C. mirata Dew. & Spikes 2 or more, long-cyl., near, loose, with long, 

 linear, rough-awncd gls. ; $ spikes 2, long-cyl., stalked, lax-flowered, suberect, 

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

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

 krog-pediceled, equaling or longer than the narroiu, rough-atoned gl. ; culm 2f, 

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

 green. — Greece, N. Y. (Bradley). (C. aristata, Boott, &c., but very different.) 



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

 quite hose-flowered, pendulous, subdistant, with filiform ptd.; perig. ovate, globous, 

 inflated, glabrous, long-rostrate, hispid, a littlo 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. $ Spikes 2 to 4, slender, tho highest long-cyl indric, the 

 next shorter; 2 sjrikh 2, often 3, long-cyl., loose, remote, bracteate, only lha 

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

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

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

 places, N. Y. to I1L (Vasey). (C. vesiearia ft. Boott., &c.) 



175 C. lacustris Willd. $ Spikes 3 — 1, erect, sessile ; $ 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 — :ff, scab- 

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

 Marshes. Common. (C. riparia Muhl. nee Gooden.) 



176 C. riparia Gooden. & Spike 3 — 5, oblong, thick, erect, sessile; 2 spikes 

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

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

 nate, or oblong-lanc. gl. ; culm 2 — 3f, scabrous above, leafy below. — Bright green. 

 Mich. (Cooley) and westward. Distinguished from the preceding by its broader, 

 more inflated fruit, and its oblong-ovate, mucronato glume, which often surpasses 

 the perig. 



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

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

 rostrate, longer than tho oblong, awned, greenish glume ; lvs. and sheaths 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. utriculata Boott, (t. 37.) $ Spike3 3 or 4, slender, cyl., long, often 

 bracteate ; 5 spikes about 3, long-cyl., large, often stam. above, subremote, tho 

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

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

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

 shorter than tho broad, stiff, nodous, netted, glaucous lvs. — Abundant in marshy 

 places wide over tho country. (C. ampullacea, ft. Carey.) 



ft. sparsiflora. Spikes all very long (4 to G'), slender, the 2 spikes very 

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

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



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

 cyL, erect, 'quite dense, short-ped., bracteate ; perig. ovatc-globous, a little inflated, 



