336 MONOECIA.— TRIANDRIA. 



fruit broad-ovate, compressed, nerved, bifid, some 

 what diverging, scabrous on the margin, rather 

 shorter than the ovate mucronate glume. 

 HAB. Woods. May. U. Culm 1—2 ft. high; 

 plant dark green. 



13. C.stipata: spike compound, oblong; spikelets 

 numerous (10 — 15,) oblong, aggregated, bracte- 

 ate ; bracts a little longer than the spikelets ; fruit 

 lanceolate, subterete and smooth below, spreading, 

 bidentate at the point, which is scabrous, twice as 

 long as the glumes. 



HAB Swamps. April. U. Culm 1 — 3 ft. high, 

 thick, small ; spik. crowded. 



14. C. sparganioides : spikelets about 8, many-flower- 

 ed ; upper ones approximate, lower ones subdis- 

 tant, bracteate ; fruit ovate, compressed, acumi- 

 nate, bifid, diverging, scabrous on the margin, 

 twice as long as the ovate mucronate glume. 



HAB. Meadows. May. U . Culm 2 ft. high ; 

 2 — 4 lowest spik. remote. 



15. C. multiflora : spike oblong, decompound, bracte- 

 ate, interrupted ; spikelets glomerate, ovate-ob- 

 long, obtuse ; fruit ovate, acuminate, compressed, 

 crowded, bifid, 3-nerved, serrulate on the mar- 

 gin, at length diverging, rather shorter than the 

 ovate cuspidate glume. 



HAB. Wet meadows. May. U. Culm 2 ft. high, 

 obtusely triang. ; spike subpanic. 



16. C. setacea : spike oblong, decompound, bracteate ; 

 spikelets glomerate, ovate, obtuse ; fruit ovate, 

 acuminate, compressed, bifid, subdiverging, as 

 long as the ovate-lanceolate awned glume. 



HAB. Meadows. June — July. U . Culm 18— 

 30 in. high, acutely triang., sulcate. 



17. C. paniculata: spike decompound, paniculate, in- 

 terrupted, the branches alternate and somewhat 

 remote ; fruit ovate, acuminate, spreading, mar- 

 gined above, bifid. 



HAB. Wet meadows. May. H . Culm 18 in. 

 high ; spikes not black in age. 



18. C. teretiuscula : spike decompound or paniculate, 



dense, subacute, (often dioecious, at length brown,) 

 spikelets with short bracts at the base : fruit ovate. 



