70S ORDER 155. CYPERACE^E. 



170 C. retrorsa Schw. $ Spikes about 3, rarely 1, often with a few perig. at 

 the base; $ spikes 4 6, oblong, cyl., approx., dense-flowered, with long and 

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

 bous, rostrate, bifurcate, nerved, reftexed, twice longer than the lane. gl. ; culrn 

 ]5 30', scabrous above, large, stiff, and leafy. Bright green. In clusters, about 

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

 attached to them. 



171 C. Schweiiiitzii Pew. $ Spikes 2, rarely 1, upper long and slender, lower 

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

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

 rostrate, inflated, nerved, glabrous, bifurcate, longer than the subulate., sulisetaceous 

 gl.; culm 6 12', scabrous above, very leafy. Palo yellowish-green. "\Vet sandy 

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



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

 linear, rough-awned gls. ; 2 spikes 2, long-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. Greece, N. Y. (Bradley). (C. aristata, Boott, &c., but very different.) 



JL73 C. longirostris Ton-. (B. t. 77.) & Spikes 3, short; 2 spikes 23, cyl, 

 quite loose-flowered, pendulous, subdistant, with filiform ped. ; perig. ovate, 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. $ Spikes 2 to 4, slender, the highest long-cylindric, tho 

 next shorter; 2 spikes 2, often 3, long-cyl., loose, remote, bracteate, only the 

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

 serrate on tho 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, N. Y. to 111. (Yasey). (C. vesicaria /?. Boott., &c.) 



175 C. lacustris "\Villd. $ Spikes 3 4, erect, sessile ; 2 spikes 23, erect, 

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

 bifurcate, glabrous, a little longer than the oblong, mucronate gl. ; culm 2 i!f, scab- 

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

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



176 C. riparia Gooden. $ Spike 3 5, oblong, thick, erect, sessile; 5 spike-* 

 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-lane, 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.) 2 Spikes 2 4, cylindric, distant, close- 

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

 rostrate, longer than the oblong, awned, greenish glume ; Ivs. and sheaths villons 

 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.) $ Spikes 3 or 4, slender, cyl., long, often 

 bracteate ; 2 spikes about 3, long-cyl., large, often stam. above, subremote, the 

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

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

 colored, larger than tho lanceolate, purplf, rough-awned glume- culm 2 to 3f, 

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

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



P. SPARSIFLORA. Spikes all very long (4 to 6'), 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. $ Spikes 2 or 3, cyl., erect; $ spikes 2 or 3, long- 

 cyl., erect, quite dense, short-ped., bracteate ; perig. ovate-globous, a little inflated, 



