430 MONOECIA riUANDRIA. 



C. retroflexa : spikes about 4, subapproximate, ovate, rtie lowest one 

 with a short bract ; fruit ovate-lanceolate, bidentate, scabrous on the 

 margin, spreading and reflexed, as long as the ovate acute glume. 



HAB. Meadows, &c. May, Tj. ; culm 812 inches liigk, subhcx- 

 ang. ; spike 3 4 5. 



C. rosea : spikes 4 6, remote, about 9-flowered, the lowest one with 

 a setaceous bract overtopping the culm ; fruit ovate, acuminate, di- 

 verging and radiate, scabrous on the distinct margin, twice as long 

 as the ovate obtuse glume. 



HAB. Moist woods, &c. May, 7J.; culm 12 inches high; spikes 1 

 inch distant, yell, green. 



C. dispenna : spikes about 3, rather remote, mostly 2-fiowered, some- 

 what erect, the lowest one bracteate ; fruit ovate, rather obtuse, nerv- 

 ed, plano-convex, smooth, with a scabrous margin, entire at the point, 

 twice as long as the ovate, obtuse, submucronate glume. 



HAB. Mountain woods. May June, QJ. ; culm 6 12 inches his'h ; 

 fruit small. 



C. Muhlenbergii : spikes about 5, ovate, crowded at the summit of 

 the culm, bracteate at the base ; fruit broad ovate, compressed, nerv- 

 ed, bifid, somewhat diverging, scabrous on the margin, rather shorter 

 than the ovate mucronate glume. 



HAB. Woods. May, 7J. ; culm 12 feet high; plant dark 

 green. 



C. stipata: spike compound, oblong; spikelets numerous (10 15,) 

 oblong, aggregated, bracteate ; bracts a little longer than the spike- 

 lets ; fruit lanceolate, subterete and smooth below, spreading, biden- 

 tate at the point, which is scabrous, twice as long as the glumes. 



HAB. Swamps. Apr. 7J. ; culm I 3 feet high, thick, small ; spike 

 crowded. 



C. sparganioides : spikelets about 8, many-flowered ; upper ones ap- 

 proximate, lower ones subdistant, bracteate ; fruit ovate, compressed, 

 acuminate, bifid, diverging, scabrous on the margin, twice as long as 

 the ovate, mucronate glume. 



HAB. Meadows. May, 1[.; culm 2 feet high ; 2 4 lowest spike 

 remote. 



C. multijlora: spike oblong, decompound, bracteate, interrupted; spike- 

 lets glomerate, ovate oblong, obtuse ; fruit ovate, acuminate, com- 

 Sressed, crowded, bifid, 3-nerved, serrulate on the margin, at length 

 iverging, rather shorter than the ovate cuspidate glume. 



HAB. Wet meadows. May, 1\. ; culm 2 feet high, obtusely triang. 

 spike subpanic. 



C. setacea : spike oblong, decompound, bracteate ; spikelets glomerate, 

 ovate, obtuse ; fruit ovate, acuminate, compressed, bifid, subdiverging, 

 as lon<r as the ovate-lanceolate awned glume. 



HAB. Meadows. June July, 7J. ; culm 18 30 inches high, acutely 

 triang., snlcate. 



C. paniculata: spike decompound, paniculate, interrupted, the branch e 

 alternate and somewhat remote ; fruit ovate, acuminate, spreading, 

 margined above, bifid. 



HAB. Wet meadows. May, 7J. ; culm 18 inches high; spikes not 

 black in age. 



C. teretiuscula : spike decompound or paniculate, dense, subacute, (often 

 dioecious, at length brown,) spikelets with short bracts at the base ; 

 fruit ovate, acuminate, somewhat gibbous at the base, bidentate, cili- 

 ate-serrulate on the margin. 



