CYPERACE^. 291 



10 C Stipata. 5iffm erect, smooth, saccular. Z<at)e» channeled, ligulate. 

 TSpikes niimoroiis, compound, bracteatc, with the bracts longer than the spike- 

 lets. Glumes membranaceous. Palcce ovate, serrulate. Frud lanceolate, 

 bi-dentate. 



n\. Apri'— May. Wet lards. 1-3 ft. 



11 C Sparganoide?. S/em erect, nearly terete. Lcai-e^ numerous, striat«, 

 Flowers in 6-S sessile spikis, immcro is. Bracts longer tlian the spikes. 

 Glumes mucronate. Palea; expanding, serrate. Fruit ovate, compressed, 

 bifid, double the leng'di of the glume. 



% April— May. Damp soils. 1-2 ft. 



12 0. Mtii.TiFLorvA. ^'/rm scabrous, Sangled. /.eaves narrow, rigid, long- 

 er than the s'em. Spike compound, oblong, spikeleis clomeraie, ovate, ob- 

 long, obtuse. Glumes lanceolate, brownish. Fruit ovate, acuminate, com- 

 prc^sed, 3-ncrved, serrulate on the margin, diverging when mature, thorter 

 than the chimes. 



% May. Moist lands. 12-18 in. 



Ce) Spikes nurncrous, the upper florets fertile. Stigmas 2. 



13 C LAtfopoDioiDEs. Stem erect, obtusely 3-angled, scabrous towards the 

 summit. Leaves sheathing the stem at the ba^e, ligulate. i:pik(s numerous, 

 eliptic crowded. Bract beneath the lowest, very long, overtnpping the stem. 

 Fruit bi-cuspidate, erect, lanceolate, with a serrulate margin, long.r than the 

 glume. 



% May. Wetlands. 1-2 ft. 



14 C ScopARiA. S/em obtnsc-ly angled. Leare? linear, with scabrous mar- 

 gins towards the summit. Spikes 5-8, alternate, eliptic, lowest one bracteate. 

 Glumes o\siie, membranaceous. Fruit ovate-lanceolate, margined, smooth, 

 bi-cuppianfp, longer than the irlumes, nerved. 



% May. Swamps. 1-2 ft. 



15 C FcEVA. Stem obtusely 3-anglcu, scabrous near the summit, furrow- 

 ed. Spikes numerous, the lower ones compound, the upper ones aggregated. 

 Palea serrulate, larger than the ciliate glumes, the lowest bract lai-gest^ sub- 

 ulate 



% May— June. Marshes. 1-2 ft. 



16 C Festucacea. Stem erect, slonder, sometimes decumbent. Leaves 

 narrow. Flowers in linear spike?. 5-8, aproximate. Bract.< small. Glumes 

 lanceolate, membr;innceous. Fruit beaked, winged, serrulate along the 

 margins, white or green. 



% .May. Damp soils. 2-3 ff. 



17 C SciKPOiDEs. iS/e»7^ errct, sknder, slightly 3-angled. ieai'M narrow, 

 ibe lower ones short. Spikes 4-6, ovate, the uppermost one clavate. Glume 

 email. Puhce ovate, 2-toothed. Fruit ovale, hi dentate, longer than the 

 glume. 



% May. Swamps. 6-12 in. 



(/) Sterile and fertile spikes distinct. Stenle spikes solitary. 



18 C Ci^sPiTOSA. Stem erect., blender, 3-angled, striate. Zeaues linear, 

 acute, with scabrous margins, fertile spikes cylindrical, Generally 3, nearly 

 sessile, sometimes with sterile fltiretsatthe summit. Bracts lo'ug. Fruit 

 ovate, obti.se, longer than the £rlume. 



% May. In bogs. 12-18 .n 



19 C Crinita. Stem acutely angled, concave, serrulate. Leaves chan- 

 neled, ylnbroiis Fer/j/e ppikes .?-4, pendulous, each generally terminated 

 by a number of sterile florets. Glumes ovate, with a subulate point. Paleee 

 ovate, not divided at the summit, shorter than the glume. Fruit eliptic, with 

 a short beak, shorter than the iiliime. 



% April— May. Swamps. 1-2 ft. 



20 C AciTTA Stem 3 angled, scabrous, leaves narrow, with scabrous 

 margins, the upper ones sessile, the lower sbeaihin?. Sterile spikes 1-3; 

 fertile 3-4. nod.lintr, cylindrical, ihe upper ones sessile, with sterile florets at 

 the summit G'umes acute. Palets ovate, entire. Fruit oblonff. 



% April— May. In bogs. 1-2 [l 



